Answer:
It is example of Closed system
Answer:
T = 0.71 seconds
Explanation:
Given data:
mass m = 1Kg, spring constant K = 78 N/m, time period of oscillation T = 0.71 seconds.
We have to calculate time period when this same spring-mass system oscillates vertically.
As we know

This relation of time period is true under every orientation of the spring-mass system, whether horizontal, vertical, angled or inclined. Therefore, time period of the same spring-mass system oscillating vertically too remains the same.
Therefore, T = 0.71 seconds
Answer: B. a stream of particles
The light is said to travel in a straight line and casts a shadow therefore, Isaac Newton formulated a hypothesis stating that lights is a stream of particles. This theory is later called the Corpuscular theory of light.
Here molecules of gas remains constant. If more pressure is applied to the piston, gaseous molecules will come closer to each other. Hence their volume decreases and density increases. Hope this helps you.
The answer is B - Current Y has a greater potential difference, and the charges flow at a slower rate.
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