2 years ago

PLZZZ HELP

Physics

1 answer:

zubka84 [21]2 years ago

5 0

Answer:

Explanation:

A feather falls from one end of a tube to the other inside a vacuum.

You might be interested in

Please answer all of these questions for brainly!

Nana76 [90]

Answer:

1. C
2. B
3. D
4. A

3 0

2 years ago

In water what happens to a base?

Ratling [72]

Your answer would be B. It forms hydrogen ions (H+)

4 0

2 years ago

Read 2 more answers

A 50-kg toboggan is coasting on level snow. As it passes beneath a bridge, a 20-kg parcel is dropped straight down and lands in

timama [110]

Answer:

$KE2/KE1=0.71$

Explanation:

By conservation of the linear momentum:

m1*V1 = (m1+m2)*V2

Solving for V2:

$V2 = \frac{m1}{m1+m2}*V1$

The kinetic energies are:

$KE1=1/2*m1*V1^2$

$KE2 = 1/2*(m1+m2)*V2^2$

$KE2 = 1/2*(m1+m2)*(\frac{m1}{m1+m2}*V1)^2$

Simplifying:

$KE2 = 1/2*\frac{m1^2}{m1+m2}*V1^2$

The ratio will be:

$KE2/KE1=\frac{1/2*\frac{m1^2}{m1+m2}*V1^2}{1/2*m1*V1^2} =\frac{m1}{m1+m2}$

$KE2/KE1=0.71$

5 0

3 years ago

A Blu-ray disk spins up from rest to an angular speed of about 10,000 revolutions per minute. If it

erma4kov [3.2K]

The correct answer is B 5,000 rev/s^2

4 0

2 years ago

It requires a force of 100 N to stretch a spring of negligible mass by a distance of 0.1 m. If the spring instead stretches a di

Mariana [72]

by the formula of spring force we know that

$F = kx$

here we know that

$F = 100 N$

$x = 0.1 m$

now we will have

$100 = k \times 0.1$

$k = 1000 N/m$

now by similar way if the stretch in spring is 0.25 m

force is given by

$F = kx$

$F = 1000 \times 0.25$

$F = 250 N$

so it will require F = 250 N force

5 0

2 years ago

Read 2 more answers