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Rus_ich [418]
3 years ago
6

Which best describes how heat energy moves within a system?

Physics
2 answers:
Rzqust [24]3 years ago
8 0
<span>Heat energy is transferred from warmer objects to cooler objects.

</span>
devlian [24]3 years ago
5 0

Answer:

This question is  not complete

Explanation:

There are three ways in which heat is transferred, they are

  • Conduction: Here, heat is transferred from a hot object to a cooler object when both objects come in contact with one another. Here, there must be a contact between the two bodies. This is so because, the particles of the hot objects have a higher kinetic energy than the cooler object, and when they come in contact with the cooler ones, they transfer these energy to the cooler ones. Metals are generally good conductors of heat.
  • Convection: Here, heat is transferred in a liquid or a gas. Hot liquids or gases transfer there heat when they come in contact with cooler ones. There must be contact in this case also. For example, when a kettle of water is boiled, the water at the base of the kettle passes heat energy to the water at the top of the kettle.
  • Radiation: This does not require physical contact but a substance receives heat energy as a result of thermal radiation. For example, the sun produces heat but does not need to touch the metals on earth before they absorb the heat from the sun. So, heat is transferred without a medium or through open space here.
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Find τf, the torque about point p due to the force applied by the achilles' tendon.
Luba_88 [7]
The formula for the torque is
<span>τf = p F
where
</span><span>τf is the torque
p is the distance where the force is applied by the tendon
F is force applied by the tendon

If there are given values, substitute in the equation and solve for the torque.</span>
3 0
3 years ago
find the average velocity of a bicycle that starts 100km south and is 120km south of town after 0.4 hours​
dusya [7]

Answer:

The average velocity is 50 km/h south

Explanation:

The average velocity of an object is its total displacement divided by

the total time taken.

That means it is the rate at which an object changes its position from

one place to another.

Average velocity is a vector quantity.

The SI unit is meters per second.

A bicycle that starts 100 km south and is 120 km south of town after

0.4 hour​.

The displacement = 120 - 100 = 20 km south

The time = 0.4 hour

The average velocity = \frac{D}{T}, where D is the displacement

and t is the time

The average velocity of the bicycle = \frac{20}{0.4}=50 km/h

<em>The average velocity is 50 km/h south</em>

If you want it in meter per second, change the kilometer to meter

and change the hour to seconds

1 km = 1000 m

1 hour = 60 × 60 = 3600 seconds

The average velocity of the bicycle = \frac{50(1000)}{3600}=13.89 m/s south

5 0
3 years ago
A monochromatic light passes through a narrow slit and forms a diffraction pattern on a screen behind the slit. As the wavelengt
azamat

bvcdbcvfdnbgfbjdgfhdgfjghfjhvjbczdfsghdfshjdgfhdftgh

8 0
3 years ago
Help, please<br> and explain
11Alexandr11 [23.1K]
We could tell a force is acting on an object if the object is being pushed, pulled, or moved in any way
5 0
3 years ago
A particle is moving with SHM of period pie . initially it is 10 cm from The center of the motion and moving in the positive dir
Viefleur [7K]

Answer:

y = 10.44cos(2t - 0.291) cm

Explanation:

y = Acos(2πt/T + φ) = Acos(2πt/π + φ) = Acos(2t + φ)

v = y' = -2Αsin(2t + φ)

10 = Acos(2(0) + φ) = Acosφ

6 = -2Αsin(2(0) + φ) = -2Asinφ

6/10 = -2Asinφ/Acosφ = -2tanφ

tanφ = -0.3

φ = -0.291 radians

10 = Acos(-0.291)

A = 10/cos(-0.291) = 10.44

7 0
3 years ago
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