<span>So we want to know which statement is true for the body of mass m=2000kg that is lifted to a height of h=15m in t=15 s. Lets calculate each of the following: Gravity force on the body is F=m*g=2000*9.81=19620 N so a is FALSE. Potential energy of the body when it is lifted to the height of 15 m is Ep=m*g*h=2000*9.81*15=294300 J so b is FALSE. Work to lift the body is: W=Fg*h=2000*9.81*15= Ep=294300 J so c is FALSE. Power P=W/t=294300/15=19620 W So d is TRUE. </span>
A.) It is a constant when the light is traveling in a vacuum
Explanation:
The speed of light is a constant when light is traveling in a vacuum. It is taken as 3 x 10⁸m/s in a vacuum.
- The speed of light is a constant in a vacuum.
- It measures the rate at which light is propagated in space.
- It is used for a number of scientific calculations and deductions.
- In astronomy, it is used as a basis for measuring time.
Learn more:
Properties of electromagnetic waves brainly.com/question/12450147
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The Atlantic and Pacific<span> Canal </span>
Find the number of hours by dividing the distance by mph. The number of hours will be to the left of the decimal point:
250 miles / 65 mph
= 3.846153846
= 3 hours
2) Find the number of minutes by multiplying what is remaining from step 1 by 60 minutes. The minutes will be to the left of the decimal point:
0.846153846 x 60
= 50.76923076
= 50 minutes
3) Find the number of seconds by multiplying what is remaining from step 2 by 60 seconds. The seconds will be to the left of the decimal point:
0.76923076 x 60
= 46.1538456
= 46 seconds
So 3 hours 50 mins and 46 seconds
Answer:
The density of the atmosphere varies in each layer as well as between each layer. The density is highest at the Earths surface and decreases as you go up.
As you go to surface it gets hotter and denser so the core would be densest and hottest and crust is the least of everything
Explanation:
im not sure if this answers your question but hopefully it can help