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Alekssandra [29.7K]
4 years ago
9

WORTH 47 POINTS!!! It's EASY too!

Physics
1 answer:
Vikentia [17]4 years ago
5 0
The Factors are Temperature and kinetic energy, the temperature is because the particles are going to move fast which means the particles in a solid container or in solid pattern they will actually vibrate and they will expand , when temperature increase, more kinetic energy between the particles .
examples is that in the steel when you heat a steel the particles inside it will vibrate then the particles speed up because the vibration increases, therefore the temperature increases so a a thermal expansion occurs that the vibration of the particles will take up more space so the steel bar expands slightly in all Direction if the temperature Falls the reverse happens and the material or steel contracts which means get smaller .
another example is the thermometer, the thermometer has a liquid inside it which is Mercury or alcohol this liquid expands when the temperature rises, the tube is made narrow so that a small increase in volume of the liquid produces a large movement along the tube.

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1. What is work done in holding a 15kg suitcase while waiting for a bus for 15 minutes?
Tems11 [23]
Work is (force applied) x (distance through which the force moves).

Since the suitcase doesn't move up or down during the 15 minutes,
no work is done ... zero, zip, nada ... according to the real Physics
definition of 'work'.
6 0
3 years ago
How are passengers affected when a moving bus is stopped suddenly? Explain with reason.<br>​
Mademuasel [1]

Answer:

When a moving bus stops suddenly, the passenger are pushed forward because of the inertia of the passengers. ... Because the lower part of the body comes to rest with the bus while the upper part tends to continue its motion due to inertia.

Explanation :

The passengers in a bus tend to fall backward when it starts suddenly due to inertia as the passengers tend to remain in the state of rest while the bus starts to move. When the bus stops suddenly, people fall forward because their inertia as they are in state of motion even when the bus has come to rest.

Hope this helps!! <3

Please mark as branliest

5 0
2 years ago
Phase Changes
worty [1.4K]

Answer:

The answer to your question below

Explanation:

Processes from solid to liquid or from liquid to gas absorb energy.

Processes from gas to liquid or liquid to solid release energy.

Condensation      phase change that releases heat

Freezing                phase change that releases heat

Melting                  phase change that absorbs heat

Sublimation          phase change that absorbs heat  

Vaporization         phase change that absorbs heat

7 0
3 years ago
An escaped convict runs 1.70 km due East of the prison. He then runs due North to a friend's house. If the magnitude of the conv
olga2289 [7]

Answer:

The right approach will be "47° north of east".

Explanation:

The given values are:

East of prison

= 1.70 km

Displacement vector

= 2.50 km

Now,

The direction will be:

⇒  Cos \ \theta =\frac{1.7}{2.5}

⇒            =0.68

⇒         \theta=47.16^{\circ}

i,e.,       \theta = 47^{\circ} (north of east)

6 0
3 years ago
What happens when a mechanical wave travels through a medium? Question 1 options: a) Waves are transferred. b) Mass is transferr
ladessa [460]
D. Energy is transferred
3 0
4 years ago
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