Its an example of a universal law because gravity occurs in every place of the world
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Answer: B)Number 1, 3 and 5 all demonstrate non-contact forces because the magnets or electrically charged objects exert forces on each other without touching.
Explanation:
Forces which act only when the two surfaces are in contact are known as contact forces. For example: frictional force is a contact force because it acts only when the two surfaces have tendency to move or are in relative motion.
Forces which act without any contact between surfaces are non-contact forces. For example: magnetic force, gravitational force, electrical force.
Because Kennedy and Lilly have to prove that some forces are non-contact forces, they must put up examples which actually show force being exerted between two objects without they being in contact. Thus, number 1, 3 and 5 demonstrate this.
The Hertzsprung-Russell Diagram is a plot between luminosity and temperature except that the temperature is decrementing to the right on the horizontal axis. According to this diagram the sun has a luminosity of 1 and a temperature at around 5,400 K.
In the northern Hemisphere, the Coriolis effect deflects a moving object <em>to the right</em> of where it's heading.
