Answer:
They conduct thermal energy from inside the house and release it outside the house.
Explanation:
An air conditioner works to by conducting thermal energy or heat from inside the house and releasing this heat energy outside the house, thus making inside of the house cooler than the outside.
Warm air from inside the house is circulated around the evaporator fins. The refrigerant liquid is made to pass through the evaporator coil made of aluminum ,where the coils exchanges the heat it absorbs from the air surrounding it with the refrigerant. Aluminum metal is used in making the evaporator coils because it is a good conductor of heat. The heat absorbed by the refrigerant coverts it to vapor, which is then reconverted into liquid by the condenser removing the heat absorbed from inside the outside by means of a fan. As the heat is removed from the air, the air is cooled and blown back inside the house. This process is repeated several times until the desired temperature is attained inside the house.
Answer:
B is the answer
Explanation:
pls give me brainliest
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
who was the chairman of drafting committe
Anybody knows this thanks !
Answer:
225J
Explanation:
1/2mvsq=1/2×50×9
Answer:
b. 225 J
Explanation:
Velocity (v) = 3 m/s
Mass (m) = 50 kg
[tex]K. E. = \frac{1}{2} m {v}^{2} \\ \\ = \frac{1}{2} \times 50 \times {3}^{2} \\ \\ = 25 \times 9 \\ \\ = 225 \: j [/tex]
Antarctica's landscape is proof that ____.
A. a large amount of water does not make a continent habitable
B. it has the highest levels of precipitation in the world
C. humans cannot survive at extremely high altitudes
D. a continent covered in snow can be one of the driest on earth
Answer:
The answer to the equation is B hope this helps:)
Answer:
D. a continent covered in snow can be one of the driest on earth
Explanation:
Aunt Mary needs to hang a picture in her bedroom. She uses a hammer to drive the nail into the wall. Find the force exerted by the hammer on the nail if the hammer stays in contact with the nail for 0.5s and has an impulse of 25Ns
Answer:
50N
Explanation:
Impulse = Force × Time
25 = Force × 0.5
Force = 25/0.5
= 50N
you walk 12 meters north, then 10 meters west. What is your displacement
Answer:
Your displacement is 15.62m NW
Explanation:
We can use the Phytagorean theorem to determine the displacement:
a^2+b^2=c^2
12^2+10^2=c^2
144+100=c^2
244=c^2
15.62=c
So your displacement is 15.62m NW
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.
what is fast carbon and what is slow carbon
please dont search it up need this right now extra points!
Answer:
the fast carbon cycle follows the movement of carbon through living (biotic) components of an ecosystem. This occurs faster because life moves more quickly. The fast carbon cycle focuses primarily on the biosphere, while the slow carbon cycle is more involved with the hydrosphere, lithosphere and atmosphere.
Explanation:
The adult house fly lives for only about 1 month, or 8 x 10^-2 y. The oldest recorded age of a tortoise was 1.8800 x 10^2 y. What is the difference between these two ages?
187.92 years
8*10^-2= .08
1.88*10^2= 188
188-.08=187.92
A constant friction force of 21 N acts on a 63-kg skier for 25 s on level snow. What is the skier’s change in velocity?
+
1. Energy due to motion is
_______ energy
Answer:
Kinetic energy
Explanation:
The energy associated with an object's motion is called kinetic energy. A speeding bullet, a walking person, and electromagnetic radiation like light all have kinetic energy.
Kinetic energy. For example, a walking person.
1.Coral reefs are endangered by?
a. Climate change b. pollution C. overfishing d. all of the above
Answer:
I'm going to go out on a limb and say D. All of the above
Explanation:
What happens to the electrons when the atoms are close but not touching?
Answer:
If the atoms get two close then the nuclii will repell each other.
Explanation:
Since electrons are negative they are attracted to the nucleus because it is positive. If two atoms get close enough together then the electrons of each atom will be attracted to both nuclii.
A 5-meter lever has a 4-meter long input arm. If an output force of 500 newtons is attached at one end of the
lever, how much input force must be applied to move the 500-newton output force?
Answer:
125N
Explanation:
500/4=125N
How does kinetic energy change if you double the steed?
please help me i neeed help with all threeas soon as possible thank you
Answer:
4b: comets
5a: supercluster
5b: they just changed 4b's solar system for milky way. I think it is still comets. if not, then just say black holes.
Anthony walks to the pizza place for lunch. He walks 1km east, and then 1 km east again. What distance did he cover? What was his displacement?
Answer:
Distance covered by Anthony is 3 km. Don't know about displacement though.
A 0.225 kg sample of tin initially at 97.5°c is dropped into 0.115 kg of water. the initial temperature of the water is 10.0°c. if the specific heat capacity of tin is 230 j/kg • °c, what is the final equilibrium temperature of the tin-water mixture
Answer:
The final equilibrium temperature of the tin-water mixture is approximately 18.468 °C
Explanation:
The parameters of heat energy transfer from the tin to the water are given as follows;
The mass of the sample of tin, m₁ = 0.225 kg
The initial temperature of the tin, T₁ = 97.5 °C
The mass of the water into which the tin is dropped, m₂ = 0.115 kg
The initial temperature of the water, T₂ = 10.0 °C
The specific heat capacity of tin, c₁ = 230 J/(kg·°C)
The specific heat capacity of water, c₂ = 4,200 J/(kg·°C)
Let 'T' represent the final equilibrium temperature of the tin-water mixture, we have;
The heat lost by the tin, ΔQ[tex]_{tin}[/tex] = The heat gained by the water ΔQ[tex]_{water}[/tex]
∴ ΔQ[tex]_{tin}[/tex] = ΔQ[tex]_{water}[/tex]
Where;
ΔQ[tex]_{tin}[/tex] = m₁·c₁·(T₁ - T)
ΔQ[tex]_{water}[/tex] = m₂·c₂·(T - T₂)
By substitution, we have;
ΔQ[tex]_{tin}[/tex] = 0.225 kg × 230 J/(kg·°C) × (97.5°C - T)
ΔQ[tex]_{water}[/tex] = 0.115 kg × 4,200 J/(kg·°C) × (T - 10.0°C)
From ΔQ[tex]_{tin}[/tex] = ΔQ[tex]_{water}[/tex], we have;
0.225 kg × 230 J/(kg·°C) × (97.5°C - T) = 0.115 kg × 4,200 J/(kg·°C) × (T - 10.0°C)
∴ 5,045.625 J - 51.75 J/°C × T = 483 J/°C × T - 4,830 J
5,045.625 J + 4,830 J = 534.75 J/°C × T
∴ 534.75 J/°C × T = 9,875.625 J
T = 9,875.625 J/(534.75 J/°C) = 18.4677419 °C ≈ 18.468 °C
The final equilibrium temperature of the tin-water mixture, T ≈ 18.468 °C.
If the sun were to burn out, it would take humans just over 8 minutes to realize because light from the sun takes just over 8
minutes to reach earth. Tommy was 3 years old when his dad showed him a particular star that was estimated to be 18 light years
away from earth. If the star burned out immediately after Tommy was showed it, how old would Tommy be before he realized the
star was gone?
A)
21 years old
B)
18 years old
9 years old
D)
6 years old
the answer is (a. 21
Answer:the answer it’s A) I just took the test on USATestPrep
Explanation:
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
You have a working electrical series circuit with three light bulbs, then 1 bulb burns out. Describe how electric current flows through the series circuit after 1 of the 3 bulbs burns out?
Answer:
NARUTO IS A DIME GOD
Explanation:
A ball of mass 12 kg is released from a height of 2.5 m
find the gravitational potential energy of the ball at point A
and when it reach the ground.
then deduce the kinetic energy of the ball once it reach the ground
(use g=10 N/kg) * 5
Answer:
300 J
Explanation:
From conservation of energy;
Gravitational potential energy at top = Kinetic Energy at bottom
mgh = ½mv²
We are given;
Mass; m = 12 kg.
Height; h = 2.5 m
g = 10 m/s²
Thus;
mgh = 12 × 2.5 × 10 = 300 J
Since mgh = Kinetic Energy at bottom.
Thus; kinetic energy of the ball once it reach the ground = 300 J
equation for power work done and time
Answer:
power can be expressed as P=work/change in time,instead of P=change of energy/change in time because the change of energy is basically the work done.
Answer:
P=W/T....is the answer
find the answer pls
Answer:
1y hija de la granja de la granja de la granja de la
A skydiver falls out of a plane from rest, and experiences no air resistance. Eventually, this skydiver reaches a velocity of 33 m/s. How much time did this take? *
Answer:
the time taken for the motion is 3.37 s
Explanation:
Given;
initial velocity of the skydiver, u = 0
final velocity of the skydiver, v = 33 m/s
The time taken for the motion is calculated as;
v = u + gt
33 = 0 + 9.8t
33 = 9.8t
t = 33 / 9.8
t = 3.37 s
Therefore, the time taken for the motion is 3.37 s
Can sombody help me out real quick?
Dogs can hear sounds that we can't. Research dogs and find out what frequencies they can hear. Write down what you find out. Using what you just learned, write a short story on what it might be like to be a dog. Include a description of what you might hear and how it might affect you if you were a dog. Your story can be fictional or nonfictional - it can be whatever you want it to be! Take some time to listen to sounds in your environment. Make a list of ten sounds, ranking them from the highest pitch to the lowest. Write a couple of sentences describing whether this was easy or difficult and why.
Answer:
I did this essay before, its not hard. Just read through it carefully and you'll figure it out. or just ask you mom, dad, guardian, or teacher for help
The human ear can hear the frequency range of 20 Hz to 20 kHz and dogs can hear up to the range of 40Hz up to 50,000Hz or even 60,000Hz. Compared to humans, dogs have a significantly wider range of hearing.
What is sound?Sound is a mechanical disturbance that travels through an elastic medium and disrupts an equilibrium condition. It is also feasible to define sound solely subjectively, as that which is perceived by the ear.
Although this definition lacks clarity and is overly pedantic because it is necessary to discuss noises that cannot be heard by the human ear, such as those made by dog whistles or sonar devices.
Given:
Dogs can hear sounds that we can't,
While small toddlers can hear noises exceeding 20,000 Hertz (Hz), the average adult cannot. (The frequency of a sound is measured in Hertz, and the greater the frequency, the higher pitched the sound.) Dogs, on the other hand, are capable of hearing frequencies between 40Hz up to 50,000Hz or even 60,000Hz.
To know more about sound:
brainly.com/question/29707602
#SPJ2
True or False. The fulcrum of a first class lever is between the output force and an input force.
Answer:
True
Explanation:
A first-class lever is a lever in which the fulcrum is located between the input effort and the output load. In operation, a force is applied (by pulling or pushing) to a section of the bar, which causes the lever to swing about the fulcrum, overcoming the resistance force on the opposite side
Q2.
The information plate on a hairdrier is shown.
230 V
VSO Ha
800 W
(a) What is the power rating of the hairdrier?
Answer:
800W
Explanation:
Given the following data;
Voltage = 230 V
Model = VSO Ha
Power = 800 W
Power is calculated by the multiplication of voltage and current flowing through an electric circuit.
Mathematically, power is given by the formula;
Power = current * voltage
The S.I unit for power is Watts and it is a measure of the energy consumption of an electronic device.
A 14-gauge copper wire of diameter 1.628 mm carries a current of 12.5 What is the potential difference across a 2.00 - m length of the wire? *p=1.47x10^-8
Answer:
[tex]V=1.76\times 10^{-4}\ V[/tex]
Explanation:
Given that,
The diameter of a wire, d = 1.628 mm
Radius, r = 0.814 mm = 0.000814m
Current, I = 12.5 mA
The length of the wire, l = 2m
The resistivity of the wire, [tex]\rho=1.47\times 10^{-8}\ \Omega-m[/tex]
We need to find the potential difference across the wire. We know that the resistance of the wire is given by :
[tex]R=\rho\dfrac{l}{A}[/tex]
Also, V = IR
[tex]\dfrac{V}{I}=\rho\dfrac{l}{A}\\\\V=\dfrac{\rho l I}{A}\\\\V=\dfrac{1.47\times 10^{-8}\times 2\times 12.5\times 10^{-3}}{\pi \times (0.000814)^2}\\\\V=1.76\times 10^{-4}\ V[/tex]
So, the potential difference of the wire is [tex]1.76\times 10^{-4}\ V[/tex].
4. A cinder block is sitting on a platform 20 m high. It has a mass of 4 kg. The block has energy. Calculate it.
784 J
3136 J
847
80 J
Answer:
Explanation:
Since the block is at rest in an elevated position, we can assume that it only has potential energy.
U=mgh is the formula for potential energy where U=potential energy, m= mass, g=acceleration due to gravity, and h=height.
Plug in known variables....
U=4kg*9.8m/s^2*20m
U=784 joules of potential energy or letter A.