The Doppler effect occurs when a source of sound or light
moves either toward or away from the observer.
Answer:
The answer is A
Explanation:
When a rockets thrusters push on the ground the ground pushes back on the rocket with equal force in the opposite direction. Hence the rocket takes off.
Newtons third law of motion states, for every action there is an equal and opposite reaction.
SOLVED DOWN BELOW
Explanation:
In series the same current goes thru both resistors, equiv resistance is 200 ohms, then using ohms law
<em>I = 25/200</em>
<em>I= .125 amps or 125 ma</em>
__________
<em>R= r1 * r2 / r1 +r2</em>
<em>R= 100 * 100 / 100 + 100</em>
<em>R= 10000 / 200</em>
<em>R= 50 ohms </em>