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AnnyKZ [126]
3 years ago
11

In which of these situations is convection most likely the main form of heat transfer? A.Warm air from a heater on the first flo

or of a house moves to the upper floors. B.The sides of a metal pan become hot when the pan is placed on a stove burner. C.A person gets a sunburn from lying on the beach too long.
D.An ice cube melts when a person holds it in his hand.
Physics
2 answers:
Kitty [74]3 years ago
3 0
The answer is D.An ice cube melts when a person holds it in his hand 
The heat from your body is causing the ice cube to melt

12345 [234]3 years ago
3 0

Answer:

the correct Answer is A.

Explanation:

i just took the test

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When a person holds a ball above earth's surface, where is this potential energy stored?​
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Answer:

in the ball

Explanation:

potential energy is where an object has energy, always, but it isn't always moving, and when you drop the ball, it has kinetic energy.

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How does the state of matter of the medium through which the sound waves and light waves travel theough affect their velocity
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Explanation:

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5 0
3 years ago
Which of the following describes how cooling
wel
I think it is C because it makes more sense
4 0
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Calculate the efficiency of a machine if the input work is 200J and the output work is 150J.​
lidiya [134]

Answer:

75% is the efficency of this maxhine

8 0
3 years ago
A car slows down uniformly from a speed of 22 m/s to rest in 4.0 seconds. How far did it travel in that time
krek1111 [17]

Answer:

\boxed{\sf Distance \ travelled = 44 \ m}

Given:

Initial speed (u) = 22 m/s

Final speed (v) = 0 m/s (Rest)

Time taken (t) = 4 seconds

To Find:

Distance travelled by car (s)

Explanation:

From equation of motion of object moving with uniform acceleration in straight line we have:

\boxed{ \bold{s =  (\frac{v + u}{2} )t}}

By substituting value of v, u & t in the equation we get:

\sf \implies s = ( \frac{0 + 22}{2} ) \times 4 \\  \\  \sf \implies s =  \frac{22}{2}  \times 4 \\  \\  \sf \implies s = 11 \times 4 \\  \\  \sf \implies s = 44 \: m

\therefore

Distance travelled by car (s) = 44 m

4 0
4 years ago
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