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3 years ago

Heat of ______ is the energy needed for a substance to change from a liquid to a gas

Physics

2 answers:

d1i1m1o1n [39]3 years ago

8 0

Answer:

$\boxed {\boxed {\sf Heat \ of \ vaporization}}$

Explanation:

There are two options for this answer: heat of fusion or heat of vaporization.

Let's define both of the terms.

<u>Heat of fusion:</u>

The amount of heat needed to change a substance from a solid to a liquid.

<u>Heat of vaporization:</u>

The amount of heat required to change a substance from a liquid to a gas.

The question asks us which type of heat provides the energy for the phase change of a liquid to a gas. Therefore, the correct answer is <em>heat of vaporization.</em>

marusya05 [52]3 years ago

3 0

Answer:

Heat of vaporization

Explanation:

When water is at high levels of temperature heat is move as an energy source into the air.

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A difference In density between gases creates buoyancy which is the ability of an object to float. 0°C helium has a density of .

rjkz [21]

Answer:

mass = 0.18 [kg]

Explanation:

This is a classic problem where we can apply the definition of density which is equal to mass over volume.

$density = \frac{mass}{volume} \\\\where:\\volume = 1 [m^3]\\density = 0.18[kg/m^3]$

mass = 0.18*1

mass = 0.18 [kg]

6 0

3 years ago

if a person with a mass of 70kg is standing on scale in an elevator when the cable snaps, what will the reading on the scale be

dybincka [34]

Answer:

The reading will be the same.

Explanation:

Mass does not depend upon anything and it remains the same anywhere. What changes is the weight of the body because it depends upon gravity and is different at different places.

Giving me the brainest will be helpful.

3 0

2 years ago

Saki is ice-staking to the left with velocity of 5 m/s. A steady breeze starts blowing. Causing saki to accelerate leftward at a

Pavlova-9 [17]

Answer:

Final velocity will be equal to 14 m/sec

Explanation:

We have given initial velocity u = 5 m/sec

Constant acceleration is given $a=1.5m/sec^2$

Time t = 6 sec

We have to find the final velocity

From first equation of motion $v=u+at$ , here v is final velocity, u is initial velocity , a is acceleration and t is time

So $v=5+1.5\times 6=14m/sec$

So equal final velocity will be equal to 14 m/sec

4 0

3 years ago

During the final stages of descent, asky diver with an

OLEGan [10]

Answer:

Gravity: downwards

Air drag and air-pressure on the inner surface of the the parachute: Upwards

Explanation:

If a sky-diver is in the final stages of his descend with open parachute such that the wind is calm and it does not blows him laterally.

In such a condition the air resistance in the form of drag and the pressure force due to the air captured in the parachute are acting in the upward direction which balance the force of gravity on the body. But this situation may occur momentarily and then again the diver must begin to slowly descend.

3 0

3 years ago

Jonathan is pushing a 25 kg box with a force of 135 N. The friction opposing the motion is unknown. The overall net force for th

disa [49]

The magnitude of the frictional force of the box is 65 N

From the question given above, the following data were obtained:

Mass (m) = 25 Kg
Force applied (Fₐ) = 135 N
Net force (Fₙ) = 70 N
Frictional force (Fբ) =?

The frictional force acting on the box can be obtained as follow:

Fₙ = Fₐ – Fբ

70 = 135 – Fբ

Collect like terms

70 – 135 = – Fբ

–65 = –Fբ

Multiply through by –1

Thus, the frictional force of the box is 65 N

Learn more on Frictional force: brainly.com/question/25767576

8 0

2 years ago

Heat of ______ is the energy needed for a substance to change from a liquid to a gas￼

Heat of ______ is the energy needed for a substance to change from a liquid to a gas