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3 years ago

9

Andrea and the other members of the tennis team are practicing hitting tennis balls. If two people hit identical balls at the sa

me time, which ball has the most kinetic energy?

2 answers:

Firlakuza [10]3 years ago

8 0

The tennis ball that is hit the hardest would have the most kinetic energy.

babymother [125]3 years ago

7 0

Answer:

d; the ball moves at its fastest speed.

Explanation:

got it on study island.

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3 years ago

Difference between reproducibility and replicability

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3 years ago

The current supplied by a battery as a function of time is I(t) = (0.88 A) e^(-t*6 hr). What is the total number of electrons tr

Degger [83]

Answer:

e. 1.2 x 10²³

Explanation:

According to the problem, The current equation is given by:

$I(t)=0.88e^{-t/6\times3600s}$

Here time is in seconds.

Consider at t=0 s the current starts to flow due to battery and the current stops when the time t tends to infinite.

The relation between current and number of charge carriers is:

$q=\int\limits {I} \, dt$

Here the limits of integration is from 0 to infinite. So,

$q=\int\limits {0.88e^{-t/6\times3600s}}\, dt$

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q = N e

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N = q/e

Substitute the suitable values in the above equation.

$N= \frac{1.9\times10^{4} }{1.69\times10^{-19}}$

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3 years ago