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slavikrds [6]
3 years ago
13

What is the most likely evidence of an energy transformation taking place when a skater glides over ice?

Physics
2 answers:
murzikaleks [220]3 years ago
6 0

Answer:

Small tracks of water are left on the ice as kinetic energy is transformed into thermal energy

Explanation:

Here when we see the evidence of energy transformation then we can say that when skater glides over the surface of ice then due to friction between the skates and the ice surface it generates heat

Due to this heat few of the ice will melt down and it converts into water

So here the energy transformation is in following way

first kinetic energy of the skater will convert into frictional work done

this frictional work will generate heat

due to heat it will convert the ice into water

so correct answer will be

Small tracks of water are left on the ice as kinetic energy is transformed into thermal energy

Triss [41]3 years ago
5 0

Small tracks of water are left on the ice as kinetic energy is transformed into thermal energy

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Two workers are sliding 290 kg crate across the floor. One worker pushes forward on the crate with a force of 430 N while the ot
m_a_m_a [10]

Answer:0.27

Explanation:

Given

One worker Pushes with force F_1=430 N

other Pulls it with a rope of rope F_2=360 N

mass of crate m=290 kg

both forces are horizontal and crate slides with a constant speed

Both forces are in the same direction so Friction will oppose the forces and will be equal in magnitude of sum of two forces because crate is moving with constant speed i.e. net force is zero on it

f_r=F_1+F_2

where f_r is the friction force

f_r=430+360

f_r=790 N

f_r=\mu N

where \muis the coefficient of static friction

N=mg

790=\mu 29\cdot 9.8

\mu =0.27

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3 years ago
Explain why frog will not look green under the red light?
IrinaVladis [17]
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8 0
2 years ago
Pure water has a pH of 7. Pure water _______. A. Is a neutral substance B. Could be either an acid or a base C. Is a base D. Is
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A. is a neutral substance a pH of 7 describes something of neutral pH where anything less than 7 is an acid and higher is a base

5 0
3 years ago
Read 2 more answers
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uranmaximum [27]
The work done will be equal to the potential energy of the piano at the final position

P.E=m.g.h

.consider the plank the hypotenuse of the right triangle formed with the ground
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sinx=opposite side / hypotenuse
= h/L

then h=L.sinx=3.49×sin31.6°=0.638m

weight w=m.g
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then Work W=P.E.=2451.404J
8 0
2 years ago
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