Answer:
A body is abandoned and it is observed that after 4 s it touches the ground. How high was it released?
Answer:
The leftmost red square.
Explanation:
As the earth surface we are looking at is moving toward the right, the impact point of the wind would be left of the original appearing target.
Electrical resistance is opposition to the flow of current in an electric circuit: resistance converts electrical energy to thermal energy, and in this regard is similar to mechanical friction. Resistances are said to dissipate electrical energy as heat.
Answer:
90% of the stars are in the main sequence of HR diagram.
Explanation:
H-r diagram or the Hertzsprung-Russell diagram shows the evolution of a stars life also known as the stellar evolution.
The four major group of stars on H-R diagram are:
-
Located on the uppermost right region of the graph, supergiants are the large, very bright and cool stars.
-
Giants are little smaller and dimmer than the Supergiants.
-
White Dwarfs are the smaller, dim but very hot stars.
-
Main Sequence includes the band of smaller stars.
