3 years ago

PLEASE HELP... 100 POINTS....

Physics

1 answer:

kirill [66]3 years ago

6 0

Answer: 20 m/s in 2 significant figures.

Explanation:

Initial velocity (u) = 0 m/s

Acceleration by gravity (a) = 9.81 m/s^2

Displacement (s) = 20m

Final velocity (v) = ?

Now, use formula

v^2 = u^2 + 2 * a * s

or, v^2 = 0^2 + 2 * 9.81 * 20

or, v = square root of( 2 * 9.81 * 20 )

So, v = 20 m/s in 2 significant figures.

You might be interested in

A car is moving at 34mi/hr. If the car travels for 6hours how many miles (mi) did the car travel? Make sure you include the prop

Dmitrij [34]

the car travels 34 mi in one hour.

then, in 6 hours car travels

34 x 6 mi

= 204 mi

5 0

3 years ago

Read 2 more answers

A radio station broadcasts at a frequency of 600 kHz. Knowing that radio waves have a speed of 300 000 000 m/s, what is the wave

soldier1979 [14.2K]

Answer:

ccvtesgdujtdchgdrgggggggfrrrtyfaasdddfffghgdshh

6 0

3 years ago

If a wave has amplitude of 2 meters, a wavelength of 2 meters, and a frequency of 10 Hz, and a period of 1 second, then at what

Serhud [2]

Answer:

20 m/s

Explanation:

The speed of a wave is given by:

$v=\lambda f$

where

$\lambda$ is the wavelength

f is the frequency

v is the speed

For the wave in this problem,

f = 10 Hz is the frequency

$\lambda=2 m$ is the wavelength

So the speed is

$v=(10 Hz)(2 m)=20 m/s$

6 0

3 years ago

Blank is the perceived frequency of a sound wave

Viefleur [7K]

pitch is the perceived frequency of a sound wave.

3 0

3 years ago

Is lateral shift or lateral displacement same ?

xxMikexx [17]

Answer:

When a ray of light passes through a glass slab of a certain thickness, the ray gets displaced or shifted from the original path. This is called lateral shift/displacement.

Explanation:

7 0

3 years ago