3 years ago

In an elastic collision, the momentum is _, and the mechanical energy is _.

Physics

1 answer:

olga nikolaevna [1]3 years ago

6 0

The answer to your question is b

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If one doubles the emfs in a circuit and doubles the resistances in the circuit at the same time, what happens to the currents t

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Answer:

Same

Explanation:

Let R be the resistance of the cell and E be the emf.

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3 years ago

Part 1

wel

Answer:

Part 1: 0.3789

Part 2: 746 J

Part 3: 2.162 kW

Explanation:

Part 1:

Eff= $1-\frac{1223}{1969}$

Eff= 0.378873 ≈ 0/3789

Part 2:

W= 0.3789(1969)

W= 746 J

Part 3:

$Power=\frac{W}{t}$

$Power= \frac{746}{0.345}$

Power= 2162.3188 Watts

2162.3188 W-----> 2.162 kW

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2 years ago

A person who weighs 69kg rides with an acceleration of +1.45 m/s2. What is the force exerted by the legs on the person's upper b

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Answer:

The force exerted by the legs on the person's upper body 32.106 N.

Given:

Mass = 69 kg

Acceleration = 1.45 $\frac{m}{s^{2} }$

To find:

Force exerted by legs on the person's upper body = ?

Formula used:

Force = mass × acceleration

Solution:

Mass of legs = $\frac{32}{100}$ mass of body

Mass of legs = 22.08 kg

According to Newton's second law of motion,

Force = mass × acceleration

Force = 22.08 × 1.45

Force = 32.106 N

The force exerted by the legs on the person's upper body 32.106 N.

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4 years ago

An 85 kg dog is sitting on a couch what is the weight of the dog

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The dog is 85kg or 187lbs (pounds)

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In an elastic collision, the momentum is _____, and the mechanical energy is _____.

In an elastic collision, the momentum is _, and the mechanical energy is _.