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Taya2010 [7]
3 years ago
7

What is the change in velocity if the final velocity is 80 mph and the initial velocity is 20 mph? Is the object speeding up or

slowing down?
Physics
1 answer:
Dimas [21]3 years ago
7 0
Answer: Δv=vf-vi=80mph-20mph=60mph
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A. attract each other.

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3 years ago
The thermal energy used by heater in 3 minutes is used to melt wax.Melting point of solid wax is 60.Specific heat of wax is 220j
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Answer:

m = 35 g

Explanation:

The specific heat of a material can be calculated by the following formula:

C = \frac{Q}{m}\\

where,

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m = mass of wax melted = ?

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220\ J/g = \frac{7700\ J}{m}\\\\m = \frac{7700\ J}{220\ J/g}\\

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3 years ago
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Explanation:

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7 0
4 years ago
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A 432 g sample of 60/27Co has a decay constant of 4.14 x 10-9 s-1. How long will it take before only 1/3 of the original sample
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Answer:

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How much work can be done in 30 seconds by a 1000-watt microwave oven?
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Half of it can be be at 1000 watt microwave oven!!!                                                                                                                                                                                                                                                                                                            I hope it help!!!!!!
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3 years ago
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