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Orlov [11]
3 years ago
14

Pls help asap!!! i need help

Physics
2 answers:
Mkey [24]3 years ago
5 0
Its the second one [b]
Murljashka [212]3 years ago
4 0

Answer:

frost

Explanation:

Hope this helps. :)

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If earth did not rotate how would air at the equator move?
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Heat rises, and it is warmer at the equator, so I think warm air would rise at the equator and move towards the cooler poles.
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Which of the following equations describes Newton’s second law
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C.

Newton’s Second Law is F=ma (force is equal to the mass multiplied by acceleration), however, the equation can be rearranged to isolate and calculate mass from force over acceleration. Therefore, m=F/a
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A small 20-kg canoe is floating downriver at a speed of 2 m/s. What is the canoe’s kinetic energy? A. 40 J B. 80 J C. 18 J
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A small 20-kg canoe is floating downriver at a speed of 2 m/s. 40 J is the canoe’s kinetic energy.

Answer: Option A

<u>Explanation:</u>

The given canoe has the mass and is being given to move at a speed. Therefore the kinetic energy of the canoe can be calculated using the following method,

Given that mass of the canoe = 20 kg and its speed =1 m/s

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K . E .=\frac{1}{2} \times 20 \times 2^{2} = 40 J

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3 years ago
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A heat engine does 9200 J of work per cycle while absorbing 22.0 kcal of heat from a hightemperature reservoir. What is the effi
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Answer: 9.9%

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Nuclear waste disposal is one of the largest issues with nuclear power. Cesium-137 is one of the high level waste products in an
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A sample of 5.2 mg  decays to .65 mg or to 1/8 of its original amount.

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You can get these other numbers similarly:

5.2 / .0102 = 510  requires about 9  half-lives which is 30 * 9 = 270 yrs

7 0
3 years ago
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