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3 years ago

What is happening in this picture?

Physics

2 answers:

Alexandra [31]3 years ago

7 0

The answer is b no problem

Neporo4naja [7]3 years ago

4 0

<h3>Answer;</h3>

B. Energy is being added to cause evaporation.

<h3><u>Explanation;</u></h3>

Evaporation takes place when liquid is heated. As the molecules of the liquid absorb heat, they begin to move around more quickly due to higher kinetic energy. This gives them the energy to break the bonds that connect them to other water molecules.
When the molecules are moving fast enough, they are able to disperse. They leave the surface of the liquid as gas molecules.
Therefore, by adding energy, molecules move faster and break away from the others. The temperature that evaporation occurs is called the vaporization point or boiling point.

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In a game of ice hockey, you use a hockey stick to hit a puck of mass 0.16 kg that slides on essentially frictionless ice. Durin

Grace [21]

Answer:

12N

Explanation:

given- mass, acelation

Fnet=ma= .16kg*75m/s2

Fnet=12 N only force no friction given.

8 0

3 years ago

Calculate the work performed by an ideal Carnot engine as a cold brick warms from 150 K to the temperature of the environment, w

olga nikolaevna [1]

To solve this problem, apply the concepts related to the calculation of the work performed according to the temperature change (in an ideal Carnot cycle), for which you have to:

$W = \int\limit_{T_c}^{T_H} C (1-\frac{T_H}{T})$

Where,

C = Heat capacity of the Brick

$T_C$ = Cold Temperature

$T_H$ = Hot Temperature

Integrating,

$W = C (T_H-T_C)- T_H C ln (\frac{T_H}{T_C})$

Our values are given as

$T_H= 300K$

$T_C = 150K$

Replacing,

$W = (1) (300-150)-300(1)ln(2)$

$W = 150-300ln2$

$W = -57.94kJ \approx 58kJ$

Therefore the work perfomed by this ideal carnot engine is 58kJ

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4 years ago

A suspicious-looking man runs as fast as he can along a moving sidewalk from one end to the other, taking 2.10 s. Then security

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Answer:1.37

Explanation:

Given

Man run along the side walk and take 2.1 s

While walking in the opposite direction it takes 13.2 s

Let the speed of man and sidewalk be $v & v_s$

Let the distance between two points be x

$x=(v+v_s)2.1 ------1$

$x=(v-v_s)13.2-----2$

From 1 & 2 we can get

$2.1v+2.1v_s=13.2v-13.2v_s$

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3 years ago

A person walks into a room that has, on opposite walls, two plane mirrors producing multiple images. Find the distances from the

Lapatulllka [165]

Answer:13.2,41.4,82.8 ft

Explanation:

Given Person is 6.60 ft from the left hand side mirror

Since the focal length of plane mirror is infinity therefore image and object are equidistant from mirror

Distance of first image on left mirror is

$d_1=6.6+6.6=13.2 ft$

i.e. image is 13.2 ft away from object

Second image

Now the right mirror forms the image of object at distance of 14.1 ft right from right mirror so its image is formed in left mirror at a distance of 34.8 from left mirror

so image distance from person is

$d_2=34.8+6.6=41.4 ft$