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Vaselesa [24]
3 years ago
8

Describe a situation in which an object's speed is constant but its velocity is changing.

Physics
1 answer:
Olegator [25]3 years ago
5 0
1) If the object changes directions with the same speed, it will be changing its velocity, because velocity is a vector, which depends on both magnitude and direction. Speed is just magnitude regardless of direction.

2) Rotational motion. 
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A soccer ball is rolling past Ramon. He kicks it in the same direction that it is rolling. What will MOST LIKELY happen? A) The
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An astronaut is a short distance away from her space station without a tether rope. She has a large wrench. What should she do w
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Answer: b. Throw it directly away from the space station.

Explanation:

According to <u>Newton's third law of motion</u>, <em>when two bodies interact between them, appear equal forces and opposite senses in each of them.</em>  

To understand it better:  

Each time a body or object exerts a force on a second body or object, it (the second body) will exert a force of equal magnitude but in the opposite direction on the first.  

So, if the astronaut throws the wrench away from the space station (in the opposite direction of the space station), according to Newton's third law, she will be automatically moving towards the station and be safe.

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3 years ago
Imagine two billiard balls on a pool table. Ball A has a mass of 7 kilograms and ball B has a mass of 2 kilograms. The initial v
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A refrigerator is used to cool water from 23°C to 5°C in a continuous manner. The heat rejected in the condenser is 570 kJ/min a
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Answer: Q=5.46 L/s

COP=2.58

Explanation:

Given that

Cp = 4.18 kJ/(kg.C

density  = 1 kg/L

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Power in put W= 2.65 KW

From first law of thermodynamics

U = W+ q

q = Heat absorbed

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7 0
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