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3 years ago

8

A battery uses ___ energy to generate _ energy. A) chemical, electrical B) chemical, mechanical C) e

lectrical, chemical D) electrical, mechanical

1 answer:

antoniya [11.8K]3 years ago

5 0

The answer is a) chemical, electrical

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The object was thrown vertically upwards at a speed of 30 m / s. How high does the body go?

valentina_108 [34]

Answer:

4.9

Explanation:

Velocity half second before maximum height = Velocity half second after maximum height (Return journey)

For downward journey :

Initial velocity u=0 m/s

We have g=9.8 m/s

Time t= ½s

s

Thus velocity after half second v=u+gt

v=0+9.8× ½ =4.9m/s

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2 years ago

An object is moving at a velocity of 23 m/s. It accelerates to a velocity of 85 m/s over a time of 2.0 s. What acceleration did

maw [93]

I believe its 31m/s^2

Explanation:

vf-vi/t

85-23/2

85-23=62

62/2=31

31m/s^2

3 0

2 years ago

The Kelvin scale begins at zero and goes up, 0 Kelvin is also known as _________.

likoan [24]

0 Kelvin is also known as Absolute Zero.

It is also the temperature of nil thermal motion.

8 0

3 years ago

Between which of the following surfaces would the force of friction be

alexdok [17]

C. Rubber shoe soles on asphalt

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3 years ago

A mass M tied to a light string is moving in a vertical circle. The tension in the string at the top is TT and TB at the bottom

natita [175]

Answer:

Explanation:

Tension provides centripetal force in the circular motion . In circular motion work done by force = torque x angle

torque is zero as , centripetal force passes through axis of rotation that is center.

So work done by centripetal force = 0

So work done by tension on M = 0

5 0

3 years ago