3 years ago

Select the correct answer.

Physics

1 answer:

Juliette [100K]3 years ago

4 0

Answer: the answer is C

Explanation:

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Answer:

close to the mirrors surface

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Which of the following explanations is correct about the wave that travels through the medium?

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If a wave is traveling at 60cm/second and has a wavelength of 15 cm what is the frequency?

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A 6 kg box with initial speed 5 m/s slides across the floor and comes to a stop after 1.9 s. What is the coefficient of kinetic

Ilia_Sergeevich [38]

Answer:

$\mu_k=0.27$

Explanation:

According to the free body diagram, in this case, we have:

$\sum F_x:-F_k=ma\\\sum F_y:N=mg$

Recall that the force of friction is given by:

$F_k=\mu_k N$

Replacing and solving for the coefficient of kinetic friction:

$-\mu_kN=ma\\-\mu_k(mg)=ma\\\mu_k=-\frac{a}{g}$

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Finally, we calculate $\mu_k$ :

$\mu_k=-\frac{-2.63\frac{m}{s^2}}{9.8\frac{m}{s^2}}\\\mu_k=0.27$

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3 years ago

How long does it take a car travelling at 60 m.p.h to cover 5 miles?

k0ka [10]

Answer:

Time = 5 minutes

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3 years ago

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