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3 years ago

Your diagram is a muscle that helps you breathe. do you think this muscle is voluntary or involuntary? Explain.

Physics

1 answer:

PIT_PIT [208]3 years ago

3 0

The diaphragm is primarily an involuntary muscle. Although voluntary means can be achieved, such as when you hold your breath while swimming, this is temporary as the diaphragm will eventually work on its own to supply your body with oxygen.

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1.Energy is used when a force acts over a.....................

Leona [35]

Answer:

the same mass answer b) but i dont know first question

5 0

3 years ago

I have 6 questions from newtons first law,<br> Second law and third law topic.

iogann1982 [59]

Rolling friction is less than sliding friction

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3 years ago

Rubbing your hands together warms them by converting work into thermal energy. If a woman rubs her hands back and forth for a to

KATRIN_1 [288]

Answer:

0.178 °C

Explanation:

Given:

The frictional force, F = 48 N

Number of rubs, n = 18

Distance covered per rub, d = 7.16 cm = 0.0716 m

Total distance covered in 18 rubs, D = 0.0716 × 18 = 1.288 m

mass of the tissues warmed, m = 0.1 kg

Now,

Work done, W = Force × Displacement

W = 48 × 1.288 = 61.8624 J

Now,

Work done is the change in heat

W = ΔQ = 61.8624 J

also,

ΔQ = mCΔT

where, C is the specific heat

for human tissue, C = 3470 J/kg°C

thus,

61.8624 J = 0.1 × 3470 × ΔT

ΔT = 0.178 °C

Hence, the change in temperature is 0.178 °C

6 0

4 years ago

If you push against a wall, the wall pushes back against you with ____ force.

viva [34]

Answer:

1. Equal.

Explanation:

Newton's third law of motion;

According to this law every action have its reaction with same magnitude but in the opposite direction.

If we push a wall with some amount of force then wall pushes back with same magnitude but in the opposite direction.This law tell us about action and reaction forces which are in same magnitude but in the opposite direction.

Therefore the answer will be 1.

1. Equal.

5 0

4 years ago

A light-rail commuter train speeds up at a rate of 1.65 m/s 2 and takes 19.0 s to reach its top speed. How far down the tracks d

Margarita [4]

Answer:

297.8 m

Explanation:

We are given that

Acceleration= $a=1.65m/s^2$