The speed of the photon has been obtained as 8.9 * 10^5 m/s.
What is the speed of the electron?We know that the energy of the photon would be converted to the kinetic energy of the photon s it is moving. We would now go ahead to obtain the energy in joule.
We now have;
Energy in joules = 2.30 * 1.6 * 10^-19
= 3.68 * 10^-19 J
Then we know that;
KE = 1/2mv^2
KE = kinetic energy
m = mass of the electron
v = speed of the electron
Then
v^2= 2KE/m
v = √2KE/m
v = √2 * 3.68 * 10^-19/9.11 * 10^-31
v = 8.9 * 10^5 m/s
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A 10.00kg ball moving at 1,7m/s collides with a 5.00kg ball at rest. If the velocity of the heavier ball is 3,4m/s after the collision, how much velocity will the lighter ball have?(after the collision)
The velocity of Ball B be after the collision is 3.4m/s.
Please explain the law of conservation of momentum and provide two examples.For a collision between two bodies, in accordance with the law of conservation of momentum. Total kinetic energy prior to impact equals total kinetic energy following impact. m1u1+m2u2=m1v1+m2v2. For instance, a gun will recoil after firing a shot. A certain amount of force is applied when the shot is fired and leaves the barrel.
Using the law of conservation of momentum;
mAuA+ mBuB = mAvA+mBvB
Substitute the given values
10(1.7) + 5(0) = 10(3.4) +5vB
17 + 0 = 34 +5vB
17-34 = 5vB
-17 = 5vB
vB = -3.4
vB =3.4m/s
Hence the velocity of Ball B be after the collision is 3.4m/s.
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Consider a field of insects, all of which have essentially the same mass.
a. If the total momentum of the insects is zero, what does this imply about their motion?
b. If the total kinetic energy of the insects is zero, what does this imply about their motion?
If the total momentum of the insects is zero, this means all of the insects are at rest or are moving in opposite of each other. Same if the total kinetic energy is zero.
What is momentum?Momentum is the quantity of motion which is multiplied by the amount of matter moved i.e., mass and the velocity at which it moves. Because, the object is in motion, it is a vector quantity, it has both direction and magnitude. It is determined by the product of the object's mass and the velocity of object.
If the total momentum of the insects is zero, this could mean anything of the two things. Either, all of the insects are at rest or an equal amount of insects are moving in opposite direction of each other which cancels out the total momentum of the insects.
If the total kinetic energy of the insects is zero, this means either all of the insects are at rest or an equal amount of insects are moving in opposite direction of one another which results into canceling out the energy.
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determine the temperature at which the celsius and fahrenheit scales give the same numerical reading (tc
There seems to be one location where the Fahrenheit or Celsius scales meet. At both -40 °C und -40 °F, they are equal.
Why is the Celsius scale so widely used?Because it is used in conjunction with the metric scale, the Fahrenheit scale is more frequently utilized. It makes reasonable that they utilize the Celsius scale as well since the majority of nations use the metric system. It is also simpler to convert from Celsius to Kelvin for this reason.
How is Celsius read?The letters °C or just C can be used to denote temperatures in Celsius as a number of degrees. The temperature difference between boils and ice is 100 degrees Celsius, whereas it is 180 ° Fahrenheit.
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Two carts on an air track have the same mass and speed and are traveling toward each other. If they collide and stick together, find the total momentum and total kinetic energy of the HINT (a) the total momentum O The final momentum is zero. The final momentum is half the initial momentum. O The final momentum is twice the initial momentum. O There is not enough information to tell. (b) the total kinetic energy O The final kinetic energy is zero. OO The final kinetic energy is half the initial kinetic energy. The final kinetic energy is twice the initial kinetic energy. O There is not enough information to tell. (c) Describe a different colliding system with this same final momentum and kinetic energy.
if they collide and remain united then the. Total momentum of the system is zero.
Total momentum by using the Principle of Momentum Conservation.
mVa-mVa=2Vb
final speed and total momentum of system =zero
p=0
Due to the inellastic impact and the same masses and speeds, the system's total kinetic energy is reduced to zero. Before and after a collision, the total kinetic energy are, respectively:
Ka=mv^2
Kb=0
Momentum is the result of a particle's mass and velocity. A vector quantity with both magnitude and direction is momentum. Isaac Newton's second equation of motion states that the force applied to a particle is equivalent to the time rate of change of momentum.
Any grouping of particles has a momentum equal to the vector sum of their momenta. A modification in one particle's momentum is perfectly balanced by a modification in the momentum of another particle, according to Newton's third law, which states that particles exert equal and opposite forces on one another.
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a student is riding a ferris wheel that moves at a constant tangential speed around a vertical circular path of radius r, as shown in figure 1. the student is sitting on a scale. at the instant the moving student is located at point p, the scale exerts a force of magnitude fscale on the student and earth exerts a force of magnitude fgravity on the student, as shown in the free-body diagram in figure 2. which of the following statements provides reasoning that supports and correctly identifies the magnitude of the force that the student exerts on the scale when the student is at point p ?
Answer:B
Explanation:According to newtons 3rd law, the forces must be equivalent
TRUE/FALSE. initial discovery of radioactivity and how it was thought to be the same as another type of light energy emission
Initial discovery of radioactivity and how it was thought to be the same as another type of light energy emission is true statement.
Henri Becquerel made the initial discovery of radioactivity. She investigated the characteristics of x-rays, which Wilhelm Roentgen had discovered in 1895, using naturally fluorescent minerals. In the belief that the uranium would absorb the sun's energy and then release it as x-rays, he placed potassium uranyl sulphate on photographic plates covered in black paper and exposed them to the sun.A study released earlier this month by the Global Carbon Project (GCP), a team of scientists who monitor emissions, predicts that CO2 emissions will increase by 4 point 9 percent in 2021 compared to the previous year.
Due to the COVID-19 pandemic and related lockdowns, emissions decreased by 5 point 4 percent in 2020.
With a 40% share and increasing, the energy sector remains the main source of greenhouse gas emissions.
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you have three light bulbs; bulb a has a resistance of 240 q, bulb b has a resistance of 192 q, and bulb c has a resistance of 144 q. each of these bulbs is used for the same amount of time in a setup like that in the drawing. in each case the speed of the rod and the magnetic field strength are the same. rank the setups in descending order, according to how much work the hand in the drawing must do (largest amount of work first).
The correct sequence will be: A, B, C
Given,
Resistance A = 240 Ω
Resistance B = 192 Ω
Resistance C = 144 Ω
We know that the resistance has relations with Current (I) and Voltage (v)
But to find the work done by the hand,
We will apply the formula of the work,
W = VIt
Replacing V with R/I
Work = (R/I)*I*t
Work= R*t
The time given is same.
So here,
Work = Resistance,
By this derivation, the highest resistance will do the highest amount of work.
Therefore, the work done by Resistance A will be the most and then the work by resistance B and then the work by resistance C.
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what does a frequency of recombination of 50 indicate
A frequency of recombination of 50% indicates that the genes are independently assorting.
Describe the gene?A gene is known as the basic physical and functional unit of heredity. Genes are made up of DNA. Some genes act as instructions to make molecules called proteins. However, many genes do not code for proteins. In humans, it is known that genes vary in size from a few hundred DNA bases to more than 2 million bases.
A frequency of recombination of 50% indicates that the genes are independently assorting which means that the inheritance of alleles at the two loci are independent. If the recombination frequency is less than 50% we say the two loci are linked.
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Problem 12.41 9 of 9 Review A 50 g mass rotates in a vertical plane--call it the xy-plane with the y-axis pointing up--at the end of a 75-cm-long, massless, rigid rod. The other end of the rod is attached to a frictionless pivot at the origin. Part A What is the gravitational torque about the pivot when the mass is 60° above the +x-axis? Give your answer using unit vectors. Express your answer in newton-meters. Enter components of torque, separated by comma. IVO AE ? Tx, Ty,Tz = N·m Submit Request Answer
The value of gravitational torque after solving the expression will be equal to -0.18375 N.mz.
What is Torque?The rotating equivalent of a force in physics or mechanics is called torque. Depending on the topic matter, it may also be referred to as the moment, point in time of force, rotating force, or turning effect. It symbolizes a force's capacity to cause a change inside the bodies natural rotational motion.
As per the given information in the question,
Mass, m = 50 g
Length, l = 75 cm
Gravitational force, [tex]\vec F[/tex] = -mgy
Then, the position vector of the particle will be,
[tex]\vec \tau[/tex] = l(cos 60° x + sin 60° y) × (-mgz)
= -0.18375 N.mz
Therefore,
[tex]\tau_x, \tau_y,\tau_z=0, 0, -0.18375[/tex]
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a wiggle in time is a
Answer:
A wiggle in time is called vibration. A wiggle in space and time is called wave. A wave is disturbance over the space. Distinguish between the propagation of sound waves and the propagation of light waves. Sound waves are mechanical waves.
which of the following lists two ways that transcranial magnetic stimulation is similar to electroconvulsive therapy?
Transcranial magnetic stimulation is similar to ECT in that "both are effective in alleviating depression and no one knows why".
Transcranial magnetic stimulation (rTMS) refers to a drug that treats a type of brain stimulation treatment used to treat sadness and nervousness. It has been being used since 1985. The treatment includes utilizing a magnet to target and fortify certain regions of the brain.
Doctors recommend taking no less than one round of medicine(drug) antidepressants before investigating the likelihood of rTMS. Antidepressants and psychotherapy might be utilized in mix with rTMS.
Therefore, they are similar to each other as these drugs are usually give a suggestion that brain stimulation is effective when treating severe forms of depression. These methods are usually used after other methods have been tried and failed. They involve the stimulation of the brain.
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After taking a hot shower, James steps out of the shower onto the tile floor. The tile felt cold to his feet. Which explanation below best describes James' experience?A.Heat from his feet is transferred to the tile floorB.Heat from the tile floor is transferred to his feetC.Cold from the tile floor is transferred to his feetD.Cold from his feet is transferred to the tile floor
The tile felt by James through his feet is due to the phenomenon on conduction. A) The heat from his feet gets transferred to the cooler tile.
When two objects are touching, and the objects each have a different temperature, then there is a transfer of energy from the hotter to the cooler one. You experience conduction throughout your day. For example, conduction explains why a tile floor feels cold on your feet (the energy from your warm foot is being transferred to the cooler tile floor) or an item taken from a freezer feels cold in your hands (the energy from your warm hand is flowing toward the item you took from the freezer).
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astronomers can now report that active star formation was going on at a time when the universe was only 20% as old as it is today. when astronomers make such a statement, how can they know what was happening inside galaxies way back then? a.they look at a graph that shows the way galaxy redshifts change with time b.they examine the spectra of galaxies (or the overall colors of galaxies) with the highest redshifts they can find c.they look at radio waves coming from nearby active galaxies d.they look at the elements in comets, which formed when our solar system was first forming e.they look at the open clusters in the milky way galaxy
Astronomers can now report that active star formation was going on at a time when the universe was only 20% as old as it is today. when astronomers make such a statement, they examine the spectra of galaxies (or the overall colors of galaxies) with the highest redshifts they can find.
SO option B is correct.
Who are Astronomers?An astronomer is described as a scientist in the field of astronomy who focuses their studies on a specific question or field outside the scope of Earth by observing astronomical objects such as stars, planets, moons, comets and galaxies – in either observational or theoretical astronomy.
Astronomers are known to use redshifts to measure how the universe is expanding, and thus to determine the distance to our universe's most distant and therefore oldest objects.
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the normal component of the magnetic flux density remains continuous across the boundary between two magnetic media
Across the border, the normal component of the flux density is constant. The strength of the tangential field is the second boundary condition, which is B1n = B2n.
Magnetic flux is it constant?Conclusion. In a continuous loop perpendicular to the motion of the electric dipoles in the magnetic material, the magnetic flux is constant and happens. Due to the conductor's constant area and varying magnetic field, the magnetic flux may change.
What is the boundary condition for E across the media interface?There could be a surface charge density at the boundary between two materials. The normal components of the electric field are discontinuous and equal to the surface charge density at the boundary between any two dielectrics, while the tangential components are continuous.
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PRELAB: A MODEL FOR CIRCUITS III: CAPACITORS AND RC CIRCUITS
1. Predict the change in capacitance of a parallel plate capacitor as the area of the plates is increased.
2. Predict the change in capacitance of a parallel plate capacitor as the separation between the plates is increased.
3. Briefly describe the observations you will make in Activity 1-2 of the lab to test one of these two predictions.
4. If you have two identical capacitors, what do you predict will be the capacitance of the two connected in parallel?
5. Briefly describe the observations you will make in Activity 2-1 of the lab to test this prediction.
6. What devices will you use to measure the decay of voltage in an RC circuit?
A parallel plate capacitor has a capacitance of C=fracepsilon_0 Ad, where A is the area of the plates and d is the distance between them. 1) If the area of the plates A_1 grows, then A_1>A C_1=fracepsilon_0 A_1d>fracepsilon_0 Ad C_1>C, which means that the capacitance also grows.
2) If the distance between the plates is increased by d_1, the capacitance decreases because d_1>d C_1=fracepsilon_0 Ad_1 fracepsilon_0 Ad C_1C.
3) Since capacitance is directly proportional to plate area, capacitance also increases with plate area.
Because capacitance is inversely proportional to plate separation, capacitance decreases as plate separation increases.
4) When two identical capacitors are connected in parallel, their equivalent capacitance is C_1 C_1=C+C=2C. 6) The Voltmeter is the device used to measure the voltage decay in an RC circuit.
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three balls are in water. ball 1 floats, with half of it exposed above the water level. ball 2, with a density less than the density of water is held below the surface by a cord anchored to the bottom of the container, so that it is fully submerged. ball 3, of same radius as ball 2, but of greater mass, is suspended from a rope so that it is fully submerged.
The correct statement about the ball 1 is the magnitude of buoyancy force is equal to that of ball's weight.
The upward force exerted on an object that is wholly or partially immersed in a fluid is called upthrust.
Ball 1 is floating on water.
Weight of the ball 1 is Fg = m₁g is acting vertically downward.
Force of buoyancy Fb = ρvg is acting vertically upwards
Net force acting on the ball is zero, Fg = Fb
As the ball 1 floats without sinking, it is in equilibrium.
This means that the net downward force is balanced by the net upward force.
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a. What are the defects of simple cell?
What can I do to make this less expensive, with less cargo damage, and with a sturdy shell condition? Anything less than the amount shown in the image.
The external part of the shell is made of fiberglass. This is probably very expensive. The production team of the above product should experiment with Graphene.
Why should Graphene be considered for the above project?It should be highlighted that graphene is already being utilized in transportation, medical, electronics, energy, defense, and desalination; graphene research is having a significant influence across a wide variety of sectors.
To put things in perspective, one square meter of normal paper is 1000 times heavier than graphene, while a single sheet of graphene large enough to cover a football field weighs less than a gram. Strongest. With a tensile strength of 150,000,000 psi, graphene outperforms steel and Kevlar.
Graphene, a single sheet of carbon atoms, has been hailed as the strongest substance known to man, 200 times stronger than steel, lighter than paper, and with amazing mechanical and electrical capabilities.
Given that graphene is formed of carbon, and carbon is in plentiful supply, it will very certainly be less expensive than fiberglass.
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The voltage across a 10 ohm resistor carrying 5 Amps of current is a. 10 Volts b. 5 Volts c. 1 Volt d. 50 Volts
The voltage of the resistor of resistance 10 ohms is 50 V. The correct option is d. 50 Volts.
What is voltage?Voltage describes the “pressure” that pushes electricity.
To calculate the voltage of the resistor, we use the formula below.
Formula:
V = IR............... Equation 1Where:
V = VoltageI = CurrentR = ResistanceFrom the question,
Given:
I = 5 AR = 10 ohmSubstitute these values into equation 1
V = 5×10V = 50 VHence, the voltage of the resistor is 50 V. Correct option d. 50 volts.
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a student in an electronics lab is studying the electrical properties of pieces of graphite
A cylindrical bit of graphite with a radius of 0.7 mm is subjected to a potential differential of 24 V along its length by the student.
What use does graphite serve?Pencils, lubricants, crucibles, casting facings, polishes, arc lights, batteries, electric motor brushes, and nuclear reactor cores all include graphite. China, India, Brazil, N.korea, and Canada all mine large amounts of it. Graphite was inadvertently created for the first time by Edward G.
What is distinctive about graphite?It is special in that it possesses traits common to both metals and non-metals, including flexibility without being elastic, high thermal and electrical conductivity, high refractoriness, and chemical inertness. Due to its low X-ray and neutron absorption, graphite is a particularly useful material.
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1. If the area of the circle you draw around the vesicle is 24 pixels what would the value of the radius be in pixels? Show your work. 2. Given your answer to Question 1, and the fact that 1um = 5.179 pixels, convert your radius from pixels to m. Show your work
3. To calculate the effective viscosity, you need to know the efficiency of the vesicle motion Supposing myosin motor proteins are moving the vesicles, what is the decimal value for the efficiency, e? (Hint:It is reported as a percent in the lab manual.)
According to the Hardy-Weinburg principle, if there are no forces driving evolution, then phenotype frequencies of such a particular population should remain stable.
How does vesicle movement work?Vesicle movement observations demonstrate that vesicles travel in a specific direction and that they copurify with kinesin motor activity.
According to the available data, kinesin and retrograde motors attach to the correct vesicle to drive vesicle movements in vivo.
Where do vesicles go?Cargo-filled vesicles are transported along the cytoskeleton by means of special motor proteins that attach to them.Different motor proteins are designed to move certain types of cargo in one direction or another along the cytoskeleton. .
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a block is released from rest at point p and slides along the frictionless track shown. at point q, its speed is:
Without any friction (= the force that makes it difficult for an object to slide across or move through something):
Is an air track frictionless?Regardless of any internal changes that may occur, including energy dissipating in one form and reappearing in another, the total energy of an isolated system remains constant.A friction drive belt, as implied by its name, is a track that is tensioned to smooth rubber wheels much like a conveyor belt. The tractive force generated for propulsion is the friction between the drive wheels and the roller path of the track.happening very easily without anything to make it slower or more difficult: We need completely frictionless trade, without tariffs or border checks. The application offers frictionless downloading and sharing.An air track is a scientific device used to study motion in a low friction environment. Its name comes from its structure: air is pumped through a hollow track with fine holes all along the track that allows specially fitted air track cars to glide relatively friction-free.Block is released from point p
Track is frictionless
height travels from p to q
(h1-h2 )
(optional energy ) p =Q ( kinetic energy)
mg( h1 - h2) = 1/2mv^2
2g(h1-h2) = v^2
###
(√2g ( h1-h2 ) = v )
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Consider an electron near the Earth's equator. In which direction does it tend to deflect if its velocity is directed in each of the following directions? (A) Downward(B) Northward(C) Westward(D) Southeastward
it tend to deflect if its velocity is in Westward direction.
What does an electrical deflection mean?An electric field that is supplied transverse to the route of the particles can be used to change the trajectory of a stream of charged particles, a process known as electrostatic deflection.
In physics, what does deflection mean?Deflection in physics is the modification of a moving object's velocity and, consequently, trajectory due to contact (collision) with a surface or the action of a non-contact force field.
What's an illustration of deflection?When someone switches the subject in the middle of a discussion, that is one of the most prevalent instances of deflection. In particular, the deflector will refocus the discourse to center on something the other person did incorrectly if their behavior is questioned.
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the pulsar in the center of the crab nebula (shown in the figure) is the remnant of a supernova that occurred in a.d. 1054. the current power output of this pulsar is pcrab
The approximate factor by which the power output of this supernova has declined since its explosion is 2 * 10⁻¹⁰
Rate of power output's decline = Current power output / Initial power output
Current power output = 10²⁸ W
Initial power output = 5 * 10³⁷ W
Rate = 10²⁸ / 5 * 10³⁷
Rate = 2 * 10⁻¹⁰
To convert this rate into a percentage value, multiply this value by 100.
Rate = 2 * 10⁻¹⁰ * 100%
Rate = 2 * 10⁻⁸ %
Therefore, the rate of decline is 2 * 10⁻¹⁰
The given question is incomplete. The complete question is:
The pulsar in the center of the crab nebula (shown in the figure) is the remnant of a supernova that occurred in AD 1054. the current power output of this pulsar is 10²⁸ W and initially the supernova has a power output of 5 * 10³⁷. Calculate the approximate factor by which the power output of this astronomical object has declined since its explosion.
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Gas a and gas b (both unreactive) are allowed to mix. The total pressure is found to be 3. 50 atm. If gas b was measured initially at 1. 25 atm, what is the partial pressure of gas a?.
If the entire quantity of the beginning material alone were to be occupied at the same temperature, the partial pressure inside a gas mixture would be the hypothetical pressure of that constituent gas. Gas an is under 2.25 atm of partial pressure.
By pressure, what do you mean?The perpendicular force per unit area, also known as the stress at a point within a confined fluid, is referred to as pressure in the physical sciences.
The purpose of pressure measurementThe manufacturing process in many different sectors depends heavily on gauging a substance's pressure. To assess the product's consistency and quality, it's critical to collect precise data that has meaning. These factors make having precise sensors essential for gathering this data.
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the solid dot shown in the figure below is a pivot point. the board can rotate about the pivot.
The torque due to perpendicular force will be greatest.
Torque is the measure of the force that can cause an object to rotate about an axis. Force is what causes an object to accelerate in linear kinematics.The unit of torque is Newton–meter (N-m) A simple way to calculate the magnitude of the torque is to first determine the lever arm and then multiply it times the applied force.It is a vector product hence torque also must be a vector. Using vector product notations we can find the direction of torque.We know that Torque = mass * velocity * sinα
where α = angle between mass and velocity.
For maximum torque, sinα = 1 ; i.e. α = 90°.
So the torque due to perpendicular force will be greatest.
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specific features are created using scrum methodology according to four distinct phases. which of the following places these phases in the correct order?
Analysis, Design, Build, Test is the correct order specific features are created using scrum methodology according to four distinct phases
Explain the distinct phase of force.A force that is applied to an object by a person or another object is referred to as an applied force. When someone pushes a desk across the room, there is an applied force acting on the object. The applied force is the force that the person exerts on the desk. The force of gravity is the attraction that the earth, moon, or other enormously large object has on another object. The normal force is the force exerted by one object in contact with another stable object. The friction force is the force exerted by a surface when an object moves or attempts to move across it.
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(c) complete the table to represent the relationship between volume and surface area of a spherical structure surrounded by a membrane.
The table represents the relationship between the volume and surface area of a spherical structure surrounded by a membrane just remember that the ratio is 1:3 and 1:1.
The surface area to volume ratio of an object is the ratio of the two measurements. The ratio of surface area to volume. Shows a comparison of the outer size and inner volume of an object. A small, thin object has a large surface area compared to its volume.
Increasing the surface area of a cell increases the amount of material that diffuses into the cell. As volume and surface area increase, volume increases more rapidly, so for every doubling of cell volume, the surface area available for uptake is halved. The amount of surface area per unit volume of an object or collection of objects.
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A bullet of mass 7.5 g that is moving at a speed of 483 m/s embeds itself into a tree, penetrating 19.4 cm into the wood.What is the magnitude of the average force, in N, exerted by the tree on the bullet? sig.gif?tid=4T78-AC-85-4A-844D-22357F =
The average force by which the bullet will hit the tree is F = 4.50945 × [tex]10^4[/tex] N .
Given : mass of the bullet = 7.5 gram
u or intial velocity = 483 m/s
v or final velocity = 0 m/s
h or height = 19.4 cm
v² = 2as + u²
0 = 38.8 a + 483 × 483
- 483 × 483/ 38.8 = a
thus acceleration = 6012.6 m/s²
F = ma
Thus on substituting the values we get
F = 7.5 × 6012.6
F = 45,094.5 N
or
F = 4.50945 × [tex]10^4[/tex] N
The magnitude of the average force is F = 4.50945 × [tex]10^4[/tex] N .
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FILL IN THE BLANK. power supplies all provide the same voltages to a system, such as 3.3v, 5v, and 12v. each of these can be referred to as a___, because each one comes from a specific tap within the power supply.
Linear regulated because each one comes from a specific tap within the power supply.
What are the four power supply stages?The four main processes shown in a block diagram of a regulated DC power supply are step down transformation, rectification, DC filtration, and regulation. Unregulated power supply and regulated power supply are the two categories that define DC power supply designs. The controlled power supply can be switched or linearly regulated.
What three types of power supplies are there?Battery-based, switched, or linear? Regulated power sources can be divided into three categories: battery-based, switching, and linear. Although switching and battery power have advantages, linear is the least complex of the three fundamental regulated power supply systems.
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