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3 years ago

If the number of crests that pass a point in a given time increases, what has increased?

2 answers:

7 0

The frequency increasing makes the crests pass more quickly. Frequency is a count of how many times per second an event occurs. In waves, this event is the passing of an entire cycle. Once the cycle has passed, the wave repeats. The faster the wave repeats, the higher the frequency. For this reason, frequency has units of hertz, Hz. The unit of hertz is 1/s or "per second"

slavikrds [6]3 years ago

7 0

Answer:

I messed up on my first answer, I looked at the question wrong thinking that it said decreased not increased. And, indeed, frequency is correct. `:D

Explanation:

Hope this helps!

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Which of the following situations describes static friction? a. A heavy crate standing on a rough patch of mud and is being push

marin [14]

Answer:

Explanation:

The answer is A because the weight of the crate is sitting on something rough. The roughness is going to resist anything that tries to move against it because the force being exerted by the 2 workers is not strong enough to get the crate to move out of its place on the mud since it's static.

The answer can't be B because ice is smooth and doesn't have any friction, the little girl can't move it because it's to heavy for her to move, not because there's friction acting against it.

8 0

3 years ago

Read 2 more answers

For a human zygote to become an embryo it must undergo

slava [35]

Only mitotic divisions change the zygote to embryo. The other sentences are related to the way zygote is created

8 0

3 years ago

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ou are pushing a 20-kg box along a horizontal floor. Friction acts on the box. When you apply a horizontal force of magnitude 48

ziro4ka [17]

Answer:

The magnitude of the frictional force is 48.02 N

Explanation:

Mass of box = 20 kg

Weight of the box (Normal reaction) = mass × acceleration due to gravity = 20 ×9.8 = 196 N

Horizontal force applied = 48 N

Coefficient of friction = horizontal force ÷ normal reaction = 48 ÷ 196 = 0.245

Frictional force = coefficient of friction × normal reaction = 0.245 × 196 N = 48.02 N

5 0

3 years ago

Read 2 more answers

Water from a fire hose is directed horizontally against a wall at a rate of 58.1 kg/s and a speed of 43.5 m/s. Calculate the mag

Umnica [9.8K]

Answer:

F = -2527.35 N

Explanation:

Given,

mass per unit time = 58.1 Kg/s

Speed of the water = 43.5 m/s

Final momentum = 0 kg/s

Force = Change in momentum

F = Final momentum - initial momentum

F = 0 - initial momentum

$F = 0 -58.1\times 43.5$

F = -2527.35 N

Hence, the Force exerted is equal to F = -2527.35 N

4 0

3 years ago

um ima em forma de barra atravessa uma espira retangular, como mostra a imagem. Sabendo que esse e um caso em que o fluxo magnet

SashulF [63]

Answer:De acuerdo con la ley de inducción electromagnética de Faraday, la tasa de cambio del flujo magnético vinculado con la bobina es directamente proporcional a la fem inducida en la bobina.

e = - d∅ / dt

Entonces, si el cambio de flujo es mayor, la fem inducida es mayor.

¡espero haber ayudado a tener un buen día! :)

Explanation:

According to the Faraday's law of electromagnetic induction, the rate of change of magnetic flux linked with the coil is directly proportional to the induced emf in the coil.

e = - d∅ / dt

So, if the flux change is more the induced emf is more.

i hope i helped have a good day! :)

7 0

3 years ago