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AlladinOne [14]

3 years ago

13

How fast can a human go before they reach terminal velocity?

1 answer:

Ne4ueva [31]3 years ago

4 0

Well a terminal velocity is a constant speed, so do u have an equation or number

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In many cartoon shows, a character runs off a cliff, realizes his predicament, and lets out a scream. He continues to scream as

Naddik [55]

Answer:

d. lower than the original pitch and decreasing as he falls.

Explanation:

As per the Doppler effect when the pitch of the sound increases as the source approaches the observer and decreases as the source moves away. A classic example of this increasing pitch of ambulance siren as it approaches you and decreasing pitch of the siren as it goes away from you.

The same effect is applicable here as well. As the character keep falling, it is moving away from the observer so the pitch of his scream will keep on decreasing.

8 0

3 years ago

Suppose you are sitting on a rotating stool holding a 2 kgmass

Aloiza [94]

Answer:Increase

Explanation:

Given

You are holding 2 kg mass in each outstreched hand

If the masses are dropped then Moment of inertia will decease by $2mr^2$

Where m=2 kg

r=length of stretched arm

Since angular momentum is conserved therefore decrease in Moment of inertia will result in increase of angular velocity

as I $\omega$ =constant

I=Moment of inertia

$\omega$ =angular velocity

3 0

3 years ago

Which option is an example of reflection?

katovenus [111]

Answer:

A

Explanation:

sound waves hit the canyon walls, then bounce back towards you. That's why you hear an echo

6 0

2 years ago

Read 2 more answers

A 100 kg box as showsn above is being pulled along the x axis by a student. the box slides across a rough surface, and its posit

Anit [1.1K]

Answer:

a) 2 m/s

b) i) $K.E = 50 (1.5t^2 + 2) ^2\\$

ii) $F = 3tm$

Explanation:

The function for distance is $x = 0.5t ^3 + 2t$

We know that:

Velocity = $v= \frac{d}{dt} x$

Acceleration = $a= \frac{d}{dt}v$

To find speed at time t = 0, we derivate the distance function:

$x = 0.5 t^3 + 2t\\v= x' = 1.5t^2 + 2$

Substitute t = 0 in velocity function:

$v = 1.5t^2 + 2\\v(0) = 1.5 (0) + 2\\v(0) = 2$

Velocity at t = 0 will be 2 m/s.

To find the function for Kinetic Energy of the box at any time, t.

$Kinetic \ Energy = \frac{1}{2} mv^2\\\\K.E = \frac{1}{2} \times 100 \times (1.5t^2 + 2) ^2\\\\K.E = 50 (1.5t^2 + 2) ^2\\$

We know that $Force = mass \times acceleration$

$a = v'(t) = 1.5t^2 + 2\\a = 3t$

$F = m \times a\\F= m \times 3t\\F = 3tm$

6 0

3 years ago

What's the formula for power<br>

poizon [28]

Answer:

What's the fórmula For power

Explanation:

Power=Work

Time

5 0

2 years ago

Read 2 more answers