Answer:
Medium 1 is air and Medium 2 is water because the light slows down.
Explanation:
Light is known to slow down in water since water is denser than air.
The work you put into something is the energy it has afterward (neglecting friction and other so-called non-conservative forces). This is called the work-energy theorem. Think of objects in a gravitational field as "energy piggy banks". If you put X joules of energy into it, that energy will be there as potential energy, stored for later. So if you do 144J of work to elevate the bucket from an initial position, what ever it is initially, the final gravitational energy is 144J greater than before.
Answer:
10 million joules or 10,000 KJ
Explanation:
Work= Force x Displacement
convert 5km into meters -5km=5000m
W= 2000N x 5000m
w=10,000,000 Joules
or 10,000KJ
F=ma
f= 66 x 2
The answer is f = 132 N
You get it by
F=ma
F=66 X 2
Answer:
<em>6.8 Kg m/s</em>
Explanation:
<u>Linear Momentum</u>
The linear momentum is defined as the product of the velocity of an object by its mass
P=mv
It's a vectorial magnitude, but if we use its equivalent scalar equation, then v is the speed
The measured speed of a pitch by Aroldis Chapman is v=47 m/s. The ball has a mass of m=145 gram=0.145 Kg. The maximum momentum of the ball was
P=(0.145 Kg)(47 m/s)=6.8 Kg m/s
The options don't show the units of the momentum, but we assumed to be Kg m/s, so the correct option is the third one