3 years ago

What is the frequency of a photon with an energy of 1.99 x 10-19 j?

1 answer:

8 0

Give me some answer choices and i will be happy to help

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AfilCa [17]

Answer:

Explanation:

The kicker exerts more force of the football which is why the football moves when its kicked.

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3 years ago

professor190 [17]

It’s b because if you’re running at 5 miles per second being a 100kg weight is the fastest

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3 years ago

Natali [406]

Answer:

P=9.58 W

Explanation:

According to Newton's second law, and assuming friction force as zero:

$F_m=m.a\\F_m=0.875kg*a$

The acceleration is given by:

$a=\frac{\Delta v}{t}\\a=\frac{0.685m/s}{21.5*10^{-3}s}\\\\a=31.9m/s^2$

So the force exerted by the motor is:

$F_m=0.875kg*31.9m/s^2\\F_m=27.9N$

The work done by the motor is given by:

$W_m=F_m*d\\\\d=\frac{1}{2}*a*t^2\\d=\frac{1}{2}*31.9m/s^2*(21.5*10^{-3}s)^2\\\\d=7.37*10^{-3}m$

$W_m=27.9N*7.37*10^{-3}m\\W_m=0.206J$

And finally, the power is given by:

$P=\frac{W_m}{t}\\P=\frac{0.206J}{21.5*10^{-3}s}\\\\P=9.58W$

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3 years ago

Mamont248 [21]

The answer is True :) have a good day

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3 years ago

dlinn [17]

<span>Each color has a different wavelength allowing the eye to see it.</span>

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3 years ago