Answer:
vfx local KFC kid lsd Ltd Ltd KFC
In a circult, a battery is used to
1. slow down current
2. conduct current
3. raise the potential of electrons
4. convert electrical energy into some other form of energy
Answer:
4. convert electrical energy into some other form of energy
What is the potential difference if a resistance of 20 ohms produces a current of 10 amperes?
Answer:
200 Volts
Explanation:
V= IR
V = 20 Ohm * 10 A = 200Volt
Potential difference V is 200 volt
Given that;Resistance R = 20 ohms
Current I = 10 Amp.
Find:Potential difference V
Computation:Potential difference V = IR
Potential difference V = 20(10)
Potential difference V = 200 volt
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What of the following does NOT influence resistance? *
A.thickness of wire
B.temperature
C.material of wire
D.Number of components
Answer:
D. Number of components
Explanation:
Answer:
D. Number of components
Explanation: hope this helps :)
Which statement correctly describes the differences between positive and negative acceleration?
Positive acceleration describes a change in speed: negative acceleration describes no change in speed.
Positive acceleration describes no change in speed; negative acceleration describes a change in speed.
Positive acceleration describes an increase in speed; negative acceleration describes a decrease in speed.
Positive acceleration describes a decrease in speed negative acceleration describes an increase in speed.
Answer: positive accel.=increase in speed
negative accel.= decrease in speed
Explanation:
Two sounds are played for you. The first has a frequency of 196 Hz. The second has a frequency of 392 Hz. Which sound will be "higher" to your ear?
A) The First
B) The Second
C) They will sound the same
Answer:
The second one, the higher the hertz the higher the frequency we hear
Explanation:
HELP ASAP
this is for science, and if i get the questions right, I pass, but the teacher never taught us the lesson, idrk y. so i really need help:( Im giving away 20 points so please give me your best answers ;)
1. As an astronaut travels from the surface of Earth to a position that is four times as far away from the center of Earth, based on the Law of Gravity which of the following statement is true?
a. mass remains the same and the gravitational pull from Earth decreases
b. weight remains the same and the gravitational pull from Earth changes
c. weight increases and the gravitational pull from Earth stays the same
d. mass decreases and the gravitational pull from Earth increases
2. A satellite is sent into orbit around the Earth, In which of the following situation would the gravitational force be the greatest?
A. 1200 lb satellite orbiting 150 miles above Earth’s surface
b. 850 lb satellite orbiting 150 miles above Earth’s surface
c. 850 lb satellite orbiting 1500 miles above Earth’s surface
d. 1200 lb satellite orbiting 1500 miles above Earth’s surface
3. High and low tides are the regular pattern of rising and sinking ocean-water levels. They are caused when the sun’s gravity and the moon’s gravity pull on ocean water. The moon’s gravity has a greater effect on Earth’s oceans than the sun’s gravity. Why would the moon have a greater effect than the sun?
a. The moon has less mass than the sun.
b. The moon is closer to Earth than the sun.
c. The moon is not as hot as the sun.
d. The moon has less mass than Earth.
4. Which statement about the universality of gravity is false?
a. The gravitational force between two objects depends only on their masses.
b. Any two objects that have mass also have a force of gravity acting between them, no matter how far apart they are.
c. The gravitational force between two objects increases if the objects move closer together.
d. The gravitational force between two objects increases if mass is added to one object.
Answer:
1)a- mass never changes as you move from the earth
2)actually am not sure I haven't been taught that too
3)b
4)a-it doesn't depend only on mass but also weight
A loop with a break in it that prevents current from flowing is called a(n)_______
circuit.
Answer:
an open circuit
Explanation:
A charged particle is placed in a space. The particle experiences a force. What can be concluded?
A.
The space contains a magnetic field.
B.
The space contains an electric field.
C.
The space has a charge opposite to the particle's.
D.
Oppositely charged particles must be present.
Answer: A.
The space contains a magnetic field
Explanation:
A charged particle is surrounded by electric field and exerts force on other charges in the field, attracting or repelling them.
But a charged particles in a magnetic field can escape into infinity without ever stopping due to magnetic force. We can therefore conclude that the space contains a magnetic field
Answer:
Explanation:
B
F.
Using this formula m = =, If a car is pushed with a net force
of 5000N, resulting in an acceleration of 3.5m/s2, what is the
mass of the car?
a 1438.5kg
b 1428.6kg
c 1328.6kg
d 1421.6kg
Answer:
C
What is the answer please help her
Charge q is 1 unit of distance away from the source charge S. Charge p is four times further away. The force exerted
between S and q is ___ the force exerted between S and p.
1/4
1/16
16 times
4 times
TRUE or FALSE? If an object moves in a circle at a constant speed, its velocity vector will be constant. Explain your answer.
An airplane moves in straight level flight at constant velocity. What is the
net force acting on it if the mass of the plane is 1000 kg and the frictional
drag of the air is 1800 N? *
Answer:
Net force = 0
Explanation:
We have, an airplane moves in straight level flight at constant velocity.
Mass of the plane is 1000 kg
The frictional force acting of the air is 1800 N.
It is required to find the net force acting on it. We know that net force is given by the product of mass and acceleration. But here the airplane moves with constant speed, it means its acceleration is equal to 0 such that net force is equal to 0.
What is the volume of this rectangular prism?
1/4cm 1/3cm 1/2cm
Answer:
1/24
Explanation:
1/4 * 1/3 * 1/2 = 1/24
Answer:
1/24
Explanation:
When light rays appear to be coming from behind a mirror, what type of image has been formed?
A.imaginary
B.real
C.plane
D.virtual
Answer:
The answer ...........may be D.
What is the speed of a high-speed electron traveling at right angles to a 0.80-tesla magnetic field with a force of -7.5 x 10^-12 newtons? The charge of an electron is 1.60 x 10^-19
Explanation:
Answer:
Magnetic field, B = 0.016 Tesla
Explanation:
It is given that,
Velocity of electron, v=9.6\times 10^5\ m/sv=9.6×10
5
m/s
Magnetic force, F=2.6\times 10^{-15}\ NF=2.6×10
−15
N
Charge, q=1.6\times 10^{-19}\ Nq=1.6×10
−19
N
The magnetic force is given by :
F=qvBF=qvB
B=\dfrac{F}{qv}B=
qv
F
B=\dfrac{2.6\times 10^{-15}}{1.6\times 10^{-19}\times 9.6\times 10^5}B=
1.6×10
−19
×9.6×10
5
2.6×10
−15
B=0.016\ TB=0.016 T
So, the magnitude of magnetic field is 0.016 Tesla. Hence, this is the required solution.
Answer:
F = q v B so v = F/q B
v = -7.5 × 10-12/(-1.60 × 10-19) (0.80) = 5.9 × 107 m/s
Explanation:
Determining Charge
An element becomes a positively charged ion when it
oloses protons.
loses electrons.
gains electrons
gains neutrons.
Answer:
hey friend,
an element becomes a positively charged ion when it loses electrons
does space have plenty of oxygen
Answer:
I don't think so because we can't breathe in space
Explanation:
Answer:
No
Explanation:
There is no oxygen in space, so astronauts must bring tanks of oxygen
A 50-kg object is accelerating to the right at 10 m/s². What is the magnitude of the rightward net force acting
on it (in Newtons)?
Answer:
I'm confused did you not get an answer at all
Balance chemical reactions: please help question attached
3. Which of the following is an example of a
supplemental restraint system?
(a) air bag
(c) lap and shoulder belt
(b) safety belt
(d) antilock brakes
Answer:
A) air bag is your answer
Answer:
air bag
Explanation:
Any of several restraining systems in a vehicle, such as an airbag, in addition to the seatbelts.
1. What are three things you think of when you think of energy?
Answer:
Food, wind, water.
Explanation:
This is supposed to be a personalized question so I answered with things that can make/give energy.
Answer:
This is personal question, very interesting! Depend on who is the person, where the person is working at, how old is that person - we can have various answers.
Personally, I think first about that human and other animals needs energy to survive, that means we need to eat, to drink; The plants need energy to survive too - that is the energy from the Sun.
Secondly, the human being needs such types of energy as electricity, wind, solar energy, etc. in oder to live. Even the acient people learnt to use solar and wind and water - natural energy from the nature.
Thirdly, the human being needs spiritual energy to have a good life.
Another specific terms of energy related to physics and chemistry, and even biology - actually are not in my mind in everyday life.
Explanation:
Traveling in circle requires a net force
Answer:
Circular motion requires a net inward or "centripetal" force. Without a net centripetal force, an object cannot travel in circular motion. In fact, if the forces are balanced, then an object in motion continues in motion in a straight line at constant speed.
Explanation:
How does planting high yield crop varieties make farming more sustainable
Answer:
The more high yield crops are planted, the more production there will be from plants.
Explanation:
High-yield plants are plants that are genetically modified or modified artificially in a way that makes farming plants more efficient. More crops grow, therefore more money.
The answer is, the more high-yield plants there are, the more efficiency there will be from farming.
Answer:
Its D
Explanation:
my options were these
A. It increases the amount of water needed
B. It keeps soil fertility from diminishing over time
C. It keeps chemicals form entering the watershed
D. It decreases the amount of land needed
A uniform electric field contains a number of particles. All are experiencing forces in the same direction as the electric field. What can be concluded from this?
All the particles have negative charges.
All the particles have positive charges.
All the particles are charged, but they may be positive or negative.
All the particles must be uncharged.
Answer: D
All the particles must be uncharged
Explanation:
If all the particles are positively charged, then there will be force of repulsion between them which will give different directions away from each other. The same is applicable if they are all negatively charged.
If the particles are positively and negatively charged, their will be force of attraction between them which will give different directions towards each other.
For all to be experiencing forces in the same direction, We can conclude that
All the particles must be uncharged.
Answer:
This picture represents the electric field diagram between two particles with static charges.
Do the two particles have the same charge?
✔ no
If the particles are free to move, what affect will the two particles have on each other?
✔ They will attract each other.
If a third particle was added to this field with a positive charge, what would it be attracted to?
✔ B
If an uncharged particle was placed between A and B, which way would it move?
✔ neither direction
Explanation:
An electric motor converts electrical energy into energy.
Answer:
into mechanical energy
...........,.
Mechanical energy it’ll turn into mechanical
What is the kinetic energy of a bicylcle with a mass of 15 kg traveling at a velocity of 3 m/s?
KE = 0.5 x mv^2
Kinetic energy equals 1/2 times mass times velocity squared.
Mass = 15kg
Velocity = 3m/s
Plug it into the formula.
KE = 0.5 x 15(3^2)
KE = 0.5 x 15(9)
Multiply the mass and velocity squared.
KE = 0.5 x 135
Then, multiply the result by 1/2 or 0.5
KE = 67.5
The kinetic energy of a bicycle that has a mass of 15kg and travels at 3m/s is 67.5J.
Answer:
67.5 J
Explanation:
Kinetic energy can be found using the following formula.
[tex]KE=\frac{1}{2}mv^2[/tex]
where m is the mass in kilograms and v is the velocity in m/s.
We know the bike has a mass of 15 kilograms. We also know the velocity is 3 m/s. Therefore, we can substitute 15 for m and 3 for v
[tex]KE=\frac{1}{2}*15*3^2[/tex]
Evaluate the exponent first. 3^2 is the same as 3*3, which is equal to 9.
[tex]KE=\frac{1}{2} *15*9[/tex]
Multiply 15 and 9.
[tex]KE=\frac{1}{2} *135[/tex]
Multiply 1/2 and 135
[tex]KE=67.5[/tex]
Add appropriate units. Kinetic energy uses Joules or J as the units.
[tex]KE= 67.5 Joules[/tex]
The kinetic energy of the bike is 67.5 Joules
the two ways you could increase acceleration
Answer: mass(how much the object weighs) and force(how hard you push the object)
Explanation:
What is the advantage of the SI unit over CGS units?
Help me ...
answer it as fast as you can...
Answer:
The advantage of the SI unit over CGS unit are:
S.I has broader base. It has seven base units and two supplementary units.S.I is metric.S.I is coherent.S.I is rational, i.e. it gives one unit for one physical quantity .e g. for energy of any type i.e, mechanical or heat or electrical.There is only one unit Joule(J) but in M.K.S system unit for mechanical energy is joule.HOPE IT WILL HELP YOU
Units of measurements
The advantage that SI unit has over CGI is that it has only one unit for each measurement
Explanation:
CGS: Also known as Gaussian units
Length is measure in cm (centimeter)
Mass is measured in g (gram)
Time is measured in s (second).
SI unit: The International System of Units
Length is measure in meter (m)
Mass is measured in kilogram (kg)
Time is measured in seconds (s)
In summary with the SI unit student do not need to store any conversion factors in memory
What needs to be done to balance this
equation?
CHA
O2
CO2
+ 2 H20
Remove coefficient 2 in front of
H2O on the right side of the
equation
Do nothing (equation is balanced).
Add coefficient 2 to O2 on the left
side of the equation.
Change O2 to Os on the left side
of the equation
Answer:
I'm not sure, but "Add coefficient 2 to O2...". You didn't really write out the equation properly.
Identify the following equation: H2 - 2H+ + 2e
A. oxidation
B. reduction
C. redox
D. none of the above
Answer:
(A.) H2 --> 2H+ 2 e- (oxidation)
Explanation:
A. oxidation is the removal of electron(s) from a substance. This is the case here, since AFTER the reaction you can see that there were electons "removed" from H2.
H2 --> 2H+ 2 e- (oxidation)
B. reduction is the addition of electron(s) to a substance
1/2 O2 + 2 e- + 2H+ --> H2O (reduction)
By the way:
Biochemical reactions often involve the transfer of complete hydrogen atoms, meaning an electron and a proton.
The substance oxidized (H2) is electron donor.
The substance reduced (O2) is electron acceptor.
Just remember this:
Prior to the reaction, the e donor is always reduced.
Prior to the reaction, the e acceptor is always oxidized.
