Complete Question:
A coin is dropped off of a building landing on its side. It hits with a pressure of 400 N/m². It hits with a force of 0.1N. Calculate the area of the coin?
Answer:
Area = 0.00025 m²
Explanation:
Given the following data;
Pressure = 400N/m²
Force = 0.1N
To find the area of the coin;
Pressure = Force/area
Area = Force/pressure
Substituting into the equation, we have;
Area = 0.1/400
Area = 0.00025 m²
1. How do we tell how much energy a ray of light has?
By it's temperature
By it's color
By it's brightness
2. Which of the following are common forms of energy released by electrons dropping from heightened energy levels?
Light, Heat
Motion, Sound
Light, Kinetic
Heat, Potential
4. Describe the shape of a field created by a bar magnet.
5. On a microscopic scale, the energy change in a system is described by a
A change in color or texture
Measuring the temperature
A chemical equation
An odor
6. The aurora borealis lights that appear in the northern hemisphere are caused by the interaction between what?
Ultraviolet radiation from the Sun and the pollution in the Earth's air
The reflected light off the moon and the scattering particles in the atmosphere
The charged particles from the Sun and natural magnetic field of the Earth
7. What happens to the atoms of a material when you run electricity through that material?
The bonds that hold the atoms together begin to stretch due to the electric current
The neutrons, having no charge, resist the flow the electric energy through the atom
The electricity only goes into atoms that have an overall electric charge of the same orientation of the electric flow
8. The amount of potential energy stored in a magnetic field depends on what?
The size of one magnetic pole
How close two magnet poles are to each other
The number of molecules magnetically aligned in a pole
Whether the pole is a North or South pole magnet
9. Compare and contrast microscopic and macroscopic energy transfer. Give at least three comparisons for each.
10. A plane is landing at an airport. The plane has a massive amount of kinetic energy due to it's motion. When the plane lands, it activates its brakes, causing it to slow down and eventually stop. The kinetic energy that the plane had is now gone. In keeping with the Law of Conservation of Energy, which of the following is the most likely explaination of what happened to that energy?
The brakes used a coil system to convert the kinetic energy into potential energy stored in the brakes
The kinetic energy of the plane gets pushed into the air in front of it due to drag forces, causing the air to move, thus transferring the kinetic energy from the plane to the air
The brakes create friction, which transformed the kinetic energy to heat energy that was dissipated to the surroundings
The kinetic energy is being converted into sound energy by the loud engines of the plane
Ce clasă ești sa văd daca te pot ajuta
Could somebody pls help me out with this?
1) You serve a Volleyball with a mass of 1.6kg. the ball leaves your hand with a speed of 25m/s. the ball has________energy. Calculate it.
2) Askateboard is sitting at the top of a hill that is 26m high. the skateboard weighs 2 N. the skateboard has _____energy. Calculate it.
Why would a person who weighs 100 lbs. on Earth weigh significantly more on Ju-piter?
a. Jupiter has more gravitational force than Earth
b. Jupiter is farther away from the sun
c. Jupiter has no atmosphere
Answer:
Is a
Explanation:
Please help me with this
Answer:
The most correct option for the magnitude of the velocity of the ship relative to the port is;
33 km/h
Explanation:
The given parameters of the cargo ship are;
The speed of the cargo ship = 25 km/h
The direction of the cargo ship, θ₁ = 20° North of East
The speed of the current = 10 km/h
The direction of the current, θ₂ = 15° North of East relative to the port
Therefore the direction of the ship relative to the port, 'θ', is given as the sum of θ₁ and θ₂ as follows;
θ = θ₁ + θ₂ = 20° + 15° = 35°
The component of the velocities relative to the port are given as follows;
The velocity of the ship, v₁ = 25·cos(35°)·i + 25·sin(35°)·j
The velocity of the current , v₂ = 10·cos(15°)·i + 10·sin(15°)·j
The velocity of the ship relative to the port, v = (25·cos(35°) + 10·cos(15°))·i + (25·sin(35°) + 10·sin(15°))·j
∴ v ≈ 30.14·i + 16.93·j
The magnitude of 'v' is [tex]\left | v \right |[/tex] = √(30.14² + 16.93²) ≈ 34.6
Therefore, the magnitude of the velocity of the ship relative to the port, [tex]\left | v \right |[/tex] ≈ 34.6 km/h.
Therefore, the closest correct option for the velocity of the ship relative to the port is 33 km/h
Answer:
The correct option for the magnitude of the velocity of the ship relative to the port is...
(33 km/h)
PLS ANSWER FAST WILL GIVE BRAINLY!!!!! BUT ONLY IF YOU KNOW
what happens outside of the nucleus?
Answer:
electrons
Explanation:
i think this is right
Temperature and Thermal Energy
Quiz
Active
2
6
7
8
10
TIME REMAINING
47:44
What happens when the thermal energy of a substance increases?
The motion of the particles in the substance increases, and the temperature of the substance decreases.
The motion of the particles in the substance decreases, and the temperature of the substance increases.
O Both the motion of the particles in the substance and the temperature of the substance decrease.
Both the motion of the particles in the substance and the temperature of the substance increase.
Answer:
the temperature increas
Long flights at midlatitudes in the Northern Hemisphere encounter the jet stream, an eastward airflow that can affect a plane’s speed relative to Earth’s surface. If a pilot maintains a certain speed relative to the air (the plane’s airspeed), the speed relative to the surface (the plane’s ground speed) is more when the flight is in the direction of the jet stream and less when the flight is opposite the jet stream. Suppose a round-trip flight is scheduled between two cities separated by 4000 km, with the outgoing flight in the direction of the jet stream and the return flight opposite it. The airline computer advises an airspeed of 1000 km/h, for which the difference in flight times for the outgoing and return flights is 70.0 min. What jet-stream speed is the computer using?
Answer:
The jet stream speed used by the computer is 142.[tex]\overline {857142}[/tex] km/h
Explanation:
The given parameters are;
The distance between the two cities the plane flies = 4,000 km
The difference in flight times for outgoing and return flights = 70.0 min
We note that 70 min = 70 min × 1 h/60 min = 7/6 h
The airspeed recommended by the airline computer = 1,000 km/h
Let 'a' represent the jet stream speed
The time it takes the plane moving in the same direction as the jet stream between the two cities, 't₁', is given as follows;
[tex]t_1 = \dfrac{4000}{1000 + a}[/tex]
The time it takes the plane moving in the opposite direction as the jet stream between the two cities, 't₂', is given as follows;
[tex]t_2 = \dfrac{4000}{1000 - a}[/tex]
The difference in flight times for outgoing and return flights, Δt = t₂ - t₁
Therefore, we have;
[tex]\Delta t = t_2 - t_1 = \dfrac{4000}{1000 - a} - \dfrac{4000}{1000 + a} = \dfrac{7}{6}[/tex]
From which we get;
[tex]-\dfrac{8000 \cdot a}{a^2 -1,000,000} = \dfrac{7}{6}[/tex]
By cross multiplying, we have;
-48,000·a = 7·a²- 7,000,000
∴ 7·a² + 48,000·a - 7,000,000 = 0
Factorizing with a graphic calculator gives;
(7·a - 1,000)·(a + 7,000) = 0
∴ a = 1,000/7, or a = -7000
Therefore, the jet stream speed the computer is using, a = 1,000/7 km/h = 142.[tex]\overline {857142}[/tex] km/h.
A 1800 kg car moving south at 17.5 m/s collide with a 2800 kg car moving north. The cars stick together and move as a unit after the collision at a velocity of 5.22 m/s to the north. Find the velocity of the 2800 kg car before the collision
Answer:
v₀₂ = -2.67 m / s
Explanation:
Let's use the conservation of the moment, for this we define a system formed by the two cars.
Consider the north direction as positive and the subscript 1 will be used for car 1 and the subscript 2 for the second car
Initial instant. Before the crash
p₀ = -m₁ v₀₁ + m₂ v₀₂
Final moment. Right after the crash
p_f = (m₁ + m₂) v
p₀ = p_f
-m₁ [tex]v_{o1}[/tex] + m₂ v_{o2} = (m₁ + m2) v_{f}
v₀₂ = [tex]\frac{(m_1 +m_2) v }{m_2}[/tex]+ [tex]\frac{m_1 v_{o1} }{m_{1} }[/tex]
let's calculate
v₀₂ = [tex]\frac{(1800 +2800) 5.22 + 1800 (-17.5)}{2800}[/tex]
v₀₂ = -2.67 m / s
the negative sign indicates that the carriage moves in the opposite direction of the temperies
1. When is the object in motion?
Answer:
An object is in motion when its distantance from another object is changing
Answer:
when an object is moving..
Explanation:
mark me as brainlist
AP physics Will give brainliest to correct answer.
Answer:
the 4th one
Explanation:
Which type of information about rattlesnakes does the bar graph above show?
Answer:
Variation
Explanation:
What will happen to a balloon filled with air when you cool the balloon in ice
Answer:
the volume of balloon decreases by the lower temperature because the gas inside is cool downA diode, which allows current to flow in one direction only, consists of two types of semiconductors joined together.
True or false
Answer:
True.
Explanation:
A diode, which allows current to flow in one direction only, consists of two types of semiconductors joined together.
A semiconductor can be defined as a crystalline solid substance that has its conductivity lying between that of a metal and an insulator, due to the effects of temperature or an addition of an impurity. Semiconductors are classified into two main categories;
1. Extrinsic semiconductor.
2. Intrinsic semiconductor.
An intrinsic semiconductor is a crystalline solid substance that is in its purest form and having no impurities added to it. Examples of intrinsic semiconductor are Germanium and Silicon.
In an intrinsic semiconductor, the number of free electrons is equal to the number of holes. Also, in an intrinsic semiconductor the number of holes and free electrons is directly proportional to the temperature; as the temperature increases, the number of holes and free electrons increases and vice-versa.
In an intrinsic semiconductor, each free electrons (valence electrons) produces a covalent bond.
Which statement is true of an electromagnetic wave?
A. The wave needs particles in matter as a medium.
B. The wave travels through electric and magnetic fields.
C. The wave is caused by vibrating particles of matter.
D. The wave carries mechanical energy.
Answer:
C
Explanation:
Electromagnetic waves are produced by the vibration of charged particles.
The true statement of an electromagnetic wave is option c. The wave is caused by vibrating particles of matter.
What is an electromagnetic wave?It is the wave that should be developed that leads to the vibration that lies between the electric field and a magnetic field.
Here EM waves should be composed for oscillating magnetic and electric fields.
Hence, the option c is correct.
Learn more about wave here: https://brainly.com/question/19053849
2.
The IMA of an inclined plane 8m long and 2m high is ______.
16
4
2
8
Answer:
Explanation:
4
Plzzzz help me!! Plz don’t guess, than you!!
Answer:
The answer is W
If you are at the top of a hill on a roller coaster at rest and you are able to complete a loop with a radius of 30 m,
a) find the minimum speed to complete the loop (hint: this is a circular motion problem)
b) find the minimum height of the hill to complete the loop
Answer:
Explanation:
People are wild about amusement parks. Each day, we flock by the millions to the nearest park, paying a sizable hunk of money to wait in long lines for a short 60-second ride on our favorite roller coaster. The thought prompts one to consider what is it about a roller coaster ride that provides such widespread excitement among so many of us and such dreadful fear in the rest? Is our excitement about coasters due to their high speeds? Absolutely not! In fact, it would be foolish to spend so much time and money to ride a selection of roller coasters if it were for reasons of speed. It is more than likely that most of us sustain higher speeds on our ride along the interstate highway on the way to the amusement park than we do once we enter the park. The thrill of roller coasters is not due to their speed, but rather due to their accelerations and to the feelings of weightlessness and weightiness that they produce. Roller coasters thrill us because of their ability to accelerate us downward one moment and upwards the next; leftwards one moment and rightwards the next. Roller coasters are about acceleration; that's what makes them thrilling. And in this part of Lesson 2, we will focus on the centripetal acceleration experienced by riders within the circular-shaped sections of a roller coaster track. These sections include the clothoid loops (that we will approximate as a circle), the sharp 180-degree banked turns, and the small dips and hills found along otherwise straight sections of the track.
Two resistors, A and B, are connected in series to a 6.0 V battery. A voltmeter connected across resistor A measures a potential difference of 4.0 V. When the two resistors are connected in parallel across the 6.0 V battery, the current in B is found to be 2.0 A. Find the resistances of A and B.
Answer:
Resistance of resistor A = 6.0 Ω and resistance of resistor B = 3.0 Ω
Explanation:
When the two resistors are in series, let V₁ = voltage in resistor A and R₁ = resistance of resistor A and V₂ = voltage in resistor B and R₂ = resistance of resistor B.
Given that V₁ + V₂ = 6.0 V and V₁ = 4.0 V,
V₂ = 6.0 V - V₁ = 6.0 V - 4.0 V = 2.0 V
Also, let the current in series be I.
So, V₁ = IR₁ and V₂ = IR₂
I = V₁/R₁ and I = V₂/R₂
equating both expressions, we have
V₁/R₁ = V₂/R₂
4.0 V/R₁ = 2.0 V/R₂
dividing through by 2.0 V, we have
2/R₁ = 1/R₂
taking the reciprocal, we have
R₂ = R₁/2
R₁ = 2R₂
From the parallel connection, let V₁ = voltage in resistor A and R₁ = resistance of resistor A and V₂ = voltage in resistor B and R₂ = resistance of resistor B. Since it is parallel, V₁ = V₂ = V = 6.0 V
Also, V₂ = I₂R₂ where I₂ = current in resistor B = 2.0 A and R₂ = resistance of resistor B
So, R₂ = V₂/I₂
= 6.0 V/2.0 A
= 3.0 Ω
R₁ = 2R₂
= 2(3.0 Ω)
= 6.0 Ω
So, resistance of resistor A = 6.0 Ω and resistance of resistor B = 3.0 Ω
The resistance of A is 6Ω while for B is 3Ω.
Definition of potential differencePotential difference is the amount of work done in moving a unit charge from one point to another.
When the two resistors are connected in parallel across the 6.0 V battery, the current in B is found to be 2.0 A, hence:
2 * Rb = 6 V
Rb = 3Ω
For the series connection:
I * 3 = (6 - 4)
I = 2/3 A
Hence:
(2/3) * Ra = 4
Ra = 6Ω
The resistance of A is 6Ω while for B is 3Ω.
Find out more on potential difference at: https://brainly.com/question/14306881
what is the rate of acceleration of a 2,000-kilogram truck if a force of 4,300 N is used to make it start moving forward
All forces acting upon a body are equal in magnitude
and opposite in direction. The object is initially
motionless and will remain motionless.
What is this condition called?
Answer:
Explanation:
It's called static equilibrium. The object is motionless and every force equals/cancels each other out
A 10 N force and a 55 N force act on an object in opposite directions. What is the net force on the object ?
Answer:
对不起，我不知道对不起
Explenation:
The net force acting on the body is 45 N
Force is a vector, vectors are quantities that have both magnitude and direction. We must take the direction of the vector into account when computing the net force.
Since the two forces act in opposite directions, the net force is; 55 N - 10 N = 45 N.
The direction of this force is towards the 55 N force which is the larger force.
Learn more: https://brainly.com/question/14685564
How are rechargeable batteries recharged? (site 1)
ANSWER ASAP THIS IS 6TH GRADE SCIENCE! GIVING BRAINLIEST FIVE STARS ANS A HEART!
A few days after a snowstorm, the roof of one house is still covered with snow, but the roof of another house is bare. What can you infer about the insulation under each roof? Explain.
Answer:
This shows the differences in the thermal tempretures and also how hot each home is.
Explanation:
Home this helps :)
Which organelle captures sunlight and helps in food synthesis?
Chloroplast
Mitochondrion
Nucleus
Ribosome
Answer: Chloroplast
Explanation: Chloroplasts work to convert the Sun's light energy into sugars that cells can use. It's like a solar panel that converts energy from sunlight into electric power.
A person drives for 1.00 h at 10.0 km/h and 2.00 h at 20.0 km/h. What is their average speed, in SI units?
A.
4.63 m/s
B.
16.7 km/h
C.
10.3 mph
D.
16.7 m/s
Divide. Write the quotient in lowest terms.
3\dfrac{3}{8} \div 9 =3
8
3
÷9
Answer:
39
Explanation:
calculator
Answer:
39 is the answer. of your questions
please help me i dont understand this
Answer:
the first arrow goes to the top right
the second arrow goes to the bottom left
the third arrow goes to the bottom right
the fourth arrow goes to the top left
Help with physics please! Offering a bunch of points!
Which muscles help you sit up from laying down?
Answer: abdominal muscles.
Explanation:
What type of wave interaction causes dead spots?
Refraction
Reflection
Constructive Interference
Destructive interference
