We know, s = ut + 1/2gt²
In free-fall, u = 0
so, t = √2s/g
Now, substitute the values,
t = √2*4 / 9.8 [ -ve sign shows opposite direction only ]
t = √8/ 9.8
t = 0.90 sec
In short, Your Answer would be 0.90 sec
Hope this helps!
Answer:
<em>The amount of charge increases.</em>
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Explanation:
For a capacitor that has its plates still connected to a battery, the voltage on the capacitor remains constant. If the distance between the two plates of this capacitor is decreased, the capacitance will increase, and then the charge on the plate will increase in accordance with the relationship
Q =CV
From this relationship, if V is held constant, then Q has to increase for C to increase also.
Answer:
The magnitude of the acceleration ae of the earth due to the gravitational pull of the moon is 
Explanation:
By Newton's gravitational law, the magnitude of the gravitational force between two objects is:
(1)
With G the gravitational constant, M the mass of earth, m the mass of the moon and r the distance between the moon and the earth, a quick search on physics books or internet websites give us the values:
Using those values on (1)
Now, by Newton's second Law we can find the acceleration of earth ae due moon's pull:
C. 2-
electrons have a negative charge, thus adding two electrons to an atom will give it a charge of 2 times -1 or -2
Answer:
the nucleus-containing central part of a neuron exclusive of its axons and dendrites that is the major structural element of the gray matter of the brain and spinal cord, the ganglia, and the retina. — called also perikaryon, soma.
