A car moving with a velocity of 20 meters/second has 1.8**10^5 joules of kinetic energy what is the mass of the car?

1 answer:

7 0

Kinetic energy = 1/2 x mass x velocity^2

mass = kinetic energy x 2 / velocity ^2

mass = (1.8 x 10^5) x 2/ 20^2

mass = 900 kg.

You might be interested in

it is determined that a certain light wave has a wavelength of 3.012x10^-12 m. the light travels at 2.99x10^8 m/s. what is the f

Dahasolnce [82]

Answer:

$9.93\times 10^{19}Hz$

Explanation:

Speed of light is the product of its wavelength and frequency, expressed as

S=fw

Where s represent speed, f is frequency while w is wavelength

Making f the subject of the formula then

f=s/w

Substituting 2.99x10^8 m/s for s and 3.012x10^-12 m for w then

$f=\frac {2.99\times 10^{8}}{3.012\times 10^{-12}}=9.926958831341\times 10^{19}\\f\approx 9.93\times 10^{19}Hz$

Therefore, the frequency equals to $9.93\times 10^{19}Hz$

4 0

2 years ago

What are the parts of an atom

Ivenika [448]

Number three

They contain protons (positive), neutrons (negative), electrons (neutral) and all are in a nucleus which is part of an atom

7 0

3 years ago

Read 2 more answers

Is Switching drugs to OTC status generally increases costs for insured patients true or false

HACTEHA [7]

I am pretty sure this is false.

5 0

3 years ago

Read 2 more answers

How fast should the platform move, vp, for the person to detect a beat frequency of 7.00 hz ? take the speed of sound to be 344

NeX [460]

<span>Delta(f) =f0 * v_rel/c , where v_rel is the relative velocity between source and observer. The source is moving at a speed v but the sound bounced off the wall and the receiver is moving toward it too. So, Delta(f) = f0 (2 V) / c Hence V = c Delta(f) /(2 f0)= 344 m/s * (7.00Hz/(2*245Hz)) =4.91 m/s</span>

7 0

3 years ago

Relative to the ground, a car has a velocity of 15.3 m/s, directed due north. Relative to this car, a truck has a velocity of 22

bogdanovich [222]

Answer:

The magnitude of the truck's velocity relative to the ground is 35.82 m/s.

Explanation:

Given that,

Velocity of car relative to ground = 15.3 m/s

Velocity of truck relative to car = 22.5 m/s

We need to calculate the magnitude of the truck's velocity relative to the ground

We need to calculate the x component of the velocity