3 years ago

Which of the examples below represents velocity correctly

Physics

2 answers:

yan [13]3 years ago

8 0

Answer:

Explanation:

The reason why it's D is because it show a real life example were you can use velocity

arlik [135]3 years ago

3 0

Answer:

the answer is B

Explanation:

I do online school and it said the answer was B.

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Which of the following did not occur during the collapse of the solar nebula?

vaieri [72.5K]

If this is one of the following, it's correct
<span>"concentrating denser materials nearer the sun"
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3 years ago

1200 meters is less than 1 kilometer

SashulF [63]

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You are playing catch with a friend in a moving train. When you toss the ball in the direction the train is moving, how does the

S_A_V [24]

I think to an observer outside the train, the speed of the ball will actually look like more than the speed of the train.

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3 years ago

A cooling fan is turned off when it is running at 850 rev/min. It turns 1500 revolutions before it comes to a stop. (a) What was

8_murik_8 [283]

Answer

given,

cooling fan revolution = 850 rev/min

fan turns before revolution = 1500 revolutions

$\omega = 850 \dfrac{2\pi}{60}$

$\omega = 89\ rad/s$

θ = 1500 revolution

θ = 1500 x 2 x π

θ = 9424.78 rad

a) using equation of rotation

ω² = ω₀² + 2 α θ

ω = 0 because body comes to rest

0 = 89² + 2 x α x 9424.78

α = -0.42 rad/s²

b) time take for the fan to stop

ω = ω₀ + α t

0 = 89 - 0.42 t

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5 0

3 years ago

It's nighttime, and you've dropped your goggles into a 3.2-mm-deep swimming pool. If you hold a laser pointer 1.1 mm above the e

Savatey [412]

Answer: 5.30m

Explanation:

depth of pool = 3.2 m

i = 67.75°

Using snell's law, we have,

n₁ × sin(i) = n₂ × 2 × sin(r)

n₁ = 1, n₂ =1.33, r= 44.09°

Hence,

Distance of Google from edge if pool is:

2.2 + d×tan(r) = 2.2 + (3.2 × tan(44.09°) =5.30m

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3 years ago