Answer:
9 hr
Explanation:
Speed = distance/time
Let the time taken by the train be t.
=> 70 = 630/t
=> t = 630/70
=> t = 9
it take 9 hr to complete its journey
Answer:
C would probably be the best answer.
Explanation:
Switches control the flow of an electrical current in a circuit. Switches open or close the circuit. If you open a circuit, you turn it off, and if you close it, you turn it on.
<h2>
Weight of body in planet is 1798.17 N</h2>
Explanation:
Weight = Mass x Acceleration due to gravity
In Earth
784 = Mass x 9.81
Mass = 79.92 kg
Mass of body = 79.92 kg
Mass is a constant, it will not change planet to planet.
In planet
Weight = Mass x Acceleration due to gravity
Weight = 79.92 x 22.5
Weight = 1798.17 N
Weight of body in planet is 1798.17 N
I would pick answer option A
Period = (1) / (frequency)
Period = (1) / (200 per second) = 0.005 second = 5 milliseconds