Non-renewable energy comes from sources that will run out or will not be replenished in our lifetimes—or even in many, many lifetimes. Most non-renewable energy sources are fossil fuels: coal, petroleum, and <u>natural gas.</u>
<u>Answer:</u> B. natural gas
<span>Molecules at higher temperatures have more energy,
thus they can vibrate faster. Since the molecules vibrate faster, sound
waves can travel more quickly. The speed of sound in room temperature
air is 346 meters per second. so that would be answer A</span>
Answer:
Explanation:
As we know that the dimensions of the base of the tank is given as
now the base area is given as
now we know that volume of the liquid filled in the tank is given as
now we will differentiate it with respect to time both sides
here we know that
now we have
Answer:
Option (a) is the correct answer
Explanation:
Option (a) smaller than P is the correct answer for the given question. This is because the pressure (P) at any depth 'd' from the top surface of the water with density (ρ) is given as:
P = ρ × g × d
where,
g is the acceleration due to the gravity
thus from the above equation it can be concluded that the pressure at any depth 'd' is directly proportional to the density of the water.
thus,
in the given case the density of the water is lower than that in the first case.
Hence, the option (a) is the correct answer