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Wewaii [24]
3 years ago
11

A railroad car of mass 20000 kg and velocity 5.0 m s to the right collides completely elastically in a head on collision with a

second car of mass 10000 kg traveling at 1.0 m s to the left and couples to it What fraction of the initial kinetic energy is still retained by the cars after the collision
Physics
1 answer:
Montano1993 [528]3 years ago
4 0

Answer:

OMG IM ON THE SAME QUESTION

Explanation:

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Consider a planet with a surface temperature of 50 K an escape speed of 30 km/s. What type of planet must this be?
Ilya [14]

Answer:

option A. Jovian

Explanation:

If we consider the temperature of the planet which is 50 K, shows that the planet is quite distant from the central point of the solar system which itself shows one of the characteristics of Jovian planets.

If escape velocities of the planets are to be considered than for terrestrial planets like that of our Earth, the escape velocity must be similar to that of the Earth which is 11.2 Km/s, quite a smaller value as the gravitational pull of Earth is stronger than that of the Jovian planets with much higher values of escape velocities as the mentioned one here is 30 km/s which is again indicative of the planet being a Jovian planet.

4 0
3 years ago
A train is running at a speed of 72 km per hour how long will it take to cover a distance of 300 km​
dmitriy555 [2]

Answer:

4hrs

Explanation:

speed =72km/hr

distance= 300km

time =?

<h3><u>speed = distance/time</u></h3>

using this formula we make time the subject of the formula

time = distance/speed

time = 300/72

time = 4.1

therefore,

<em>time is equal to 4hrs</em>

3 0
3 years ago
Read 2 more answers
Defiance Drake, Space Adventurer, desperately needs to reach a cargo vessel 100m away, or run out of air and die in deep space.
jolli1 [7]

She misses. She should have accelerated faster in order to get to her target.

5 0
3 years ago
State the name of electromagnetic wave other than visible light ?​
Natali5045456 [20]

Answer:

-Radio waves

-Microwaves

-Infrared light (IR)

-Visible light

-Ultraviolet (UV)

-X-ray

-Gamma rays

(this is in order from the longest wavelength to shortest wavelength)

7 0
3 years ago
How much power is delivered to a light bulb on a 120V, 0.5A<br> circuit?
jasenka [17]

Answer:

60 w

Explanation:

Given :

V= 120V

I=0.5 A

Now,

power can be calculated as :

P=VI

where,

V is voltage

I is current

Now,

P=(120)(0.5)

P=60 W

Therefore, 60w power is delivered to a light

5 0
3 years ago
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