For the answer to the question above, i<span>n </span>direct current<span> (</span>DC<span>), the </span>electric charge<span> (</span>current)only flows<span> in one direction. </span>Electric charge<span> in alternating </span>current<span> (AC), on the other hand, changes direction periodically. The voltage in AC circuits also periodically reverses because the </span>current<span> changes direction. So my answer is A.</span>
(a) The value of the gravitational acceleration is given by:
where
is the gravitational constant
M is the Earth's mass
is the Earth's radius at the pole
If we use the value for g given by the problem, 
, and we rearrange the equation above, we find the value of the Earth's mass:
(b) The value we found for the Earth's mass is 
, and we see that this value is slightly larger than the accepted value of 
.
Answer: All of our energy comes from the sun, which is our nearest star. The sun sends out huge amounts of energy through its rays every day. We call this energy solar energy or radiant energy. Without the sun, life on earth would not exist, since our planet would be totally frozen.
Answer:
D, using a spring scale to exert a force on the block. Measure the acceleration of the block and the applied force
Explanation:
For this you would use the net force equation acceleration=net force * mass however you will want to isolate mass so it would be acceleration/ net force to get mass. Then process of elimination comes to play.
Hello There!
It takes the planet Mars around 24 hours, 37 minutes, 23 seconds to rotate on its axis. This is around the same amount of time that it takes our planet to rotate once on its axis.
