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Katena32 [7]
3 years ago
9

John is riding a ski lift to the top of Wildcat Mountain. He removes his gloves and rapidly rubs his hands together to warm them

up. What happens when John rubs his hands?
A.)The skin on his hands rapidly conducts heat, similar to metal.
B.)He traps heat between his hands because skin is an insulator.
C.)The particles in his hands vibrate faster because of friction.
D.)Thermal energy moves from his fingertips to his palms.
E.) He simulates a fever that'll raise his core body temperature
Physics
2 answers:
Anika [276]3 years ago
8 0
The particles in his hands vibrate faster because of friction. This is because on of that which is produced after friction is heat
UNO [17]3 years ago
4 0

Answer : (c) is correct option.

Explanation :

When he removes his gloves and rapidly rubs his hands together, he feels warmth in his hands.

This is because when he rubs his hands together, friction causes between them and the particles in our hands vibrate faster.

So, the correct option is (c) i.e. the particles in his hands vibrate faster because of friction.

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What is net force?
kramer

Answer:

A. The sum of all the forces acting on an object.

3 0
3 years ago
How does a seat belt stop your body from moving in a forward motion in a car?
stiks02 [169]
D, when a moving car suddenly stops, your body is still moving forward until the seatbelt stops you.

When things move, there is always friction. It's what makes cars move in the first place. The inside of the car doesn't move, however the wheels on the car are moving at a rapid pace. When the car stops violently, everything inside the car is thrown. The seat belt acts as a safety precaution if an accident happens.

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5 0
3 years ago
A stuffed toy with a mass of 0.900 kilograms sits on the edge of a bed at a height of 0.830 if the toy falls off the bed what wi
Olenka [21]
Mechanical energy (ME) is the sum of potential energy (PE) and kinetic energy (KE). When the toy falls, energy is converted from PE to KE, but by conservation of energy, ME (and therefore PE+KE) will remain the same.

Therefore, ME at 0.500 m is the same as ME at 0.830 m (the starting point). It's easier to calculate ME at the starting point because its just PE we need to worry about (but if we wanted to we could calculate the instantaneous PE and KE at 0.500 m too and add them to get the same answer).

At the start:

ME = PE = mgh
ME = 0.900 (9.8) (0.830)
ME = 7.32 J
8 0
3 years ago
A 1.5 wire carries a 8 A current potential difference of 89 V is applied . What is the resistance of the wire
S_A_V [24]
We have no idea what the 1.5 means. Fortunately, we don't need it.

Resistance = voltage / current

= (89 v) / (8 A) = 11.125 ohms
8 0
3 years ago
How much kinetic energy does a 7.2-kg dog need to make a vertical jump of 1.2 m? (The acceleration due to gravity is 9.8 m/s2.)
V125BC [204]
<span>How much kinetic energy does a 7.2-kg dog need to make a vertical jump of 1.2 m?
</span>Answer:

85 Joule (approx)

Explanation:

Potential energy at highest point

<span><span>P.E = mgh = 7.2 kg × 9.8 m/s2</span>×1.2 m≈85 Joule</span>

This is the kinetic energy required for dog to jump a height of 1.2 m.



hope this helps!

7 0
3 years ago
Read 2 more answers
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