Answer: <u>D. An AC circuit</u>
Explanation:
I took it on a test and it was correct ; )
According to the heliocentric theory, the sun is the center of everything in the universe.
Answer:

Explanation:
Given that,
Pressure, P = 1 atm = 101325 Pa
Area of the square surface, A = 10² = 100 m²
We need to find the mass of vertical column of air. We know that, pressure is equal to the force acting per unit area. So,

So, the required mass of the vertical column of air is
.
Answer:
faster; more kinetic energy
Explanation: