All categories

4 years ago

two identical objects move with speeds of 5.0 m s and 25.0 m s. What is the ratio of their kinetic energies?

Physics

1 answer:

lions [1.4K]4 years ago

4 0

The formula for kinetic energy is KE = 0.5mv^2

Where m is the mass

And v is the velocity

Since the two object are identical so their mass are equal

KE1/ KE2 = 0.5m(v1)^2/ 0.5m(v2)^2

KE1/ KE2 = (v1)^2/ (v2)^2

KE1/ KE2 = (5)^2/ (25)^2

KE1/ KE2 = 1/25

KE1:KE2 = 1:25

You might be interested in

What is newton first law

andrew11 [14]

Answer:

Newtons first law states that:

If a body is in rest or motion in a straight line, it remains at rest or at motion in a straight line with constant speed until and unless and external unbalanced force acts on it.

'This law is also known as the law of Inertia.'

5 0

3 years ago

Two loudspeakers emit sound waves along the x-axis. The sound has maximum intensity when the speakers are 20 cm apart. The sound

Sophie [7]

Answer:

a. Wavelength = λ = 20 cm

b. Next distance of maximum intensity will be 40 cm

Explanation:

a. The distance between the two speakers is 20cm. SInce the intensity is maximum which refers that we have constructive interference and the phase difference must be an even multiple of π and equivalent path difference is nλ.

Now when distance increases upto 30 cm between the speakers, the sound intensity becomes zero which means that there is destructive interference and equivalent path is now increased from nλ to nλ + λ/2.

This we get the equation:

(nλ + λ/2) - nλ = 30-20

λ/2 = 10

λ = 20 cm

b. at what distance, sound intensity will be maximum again.

For next point calculation for maximum sound intensity, the path difference must be increased (n+1) λ. The distance must increase by λ/2 from the point of zero intensity.

= 30 + λ/2

= 30 + 20/2

=30+10

=40 cm

7 0

4 years ago

Why do most scientists follow a set order of steps when carrying out a scientific investigation?

eimsori [14]

Scientists follow a set order of steps when carrying out a scientific investigation to make sure that the method, interpretation and results that they have obtained are repeatable and reliable. This kind of information can be truly said that their data is true and valid.

6 0

3 years ago

Read 2 more answers

A 3 kg object is attached to a 1000 N/m spring. The spring is compressed 0.10 m and then the spring launches the object horizont

Viktor [21]

Answer:

1.826m/s

Explanation:

E=1/2*k*(∆L)^2

E=1/2*mV^2

6 0

3 years ago

What are some ways houses along the coastlines can protect themselves from storm surges?

BARSIC [14]

Build walls around the coast

8 0

3 years ago