BOTH plant and animal cells contain... i need a answer now it's due today please help
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We have that the electric field at the center of the metal ball due only to the charges on the surface of the metal ball is
From the question we are told that
A solid metal ball of radius 1.5 cm
bearing a charge of -15 nC is located near a hollow plastic ball of radius 1.9 cm bearing
uniformly distributed charge of -7 nC
The distance between the centers of the balls is 9 cm
Generally the equation for the electric field is mathematically given as
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Answer:
20 N
Explanation:
There are two forces acting on the box:
- The force of push, F, forward, of magnitude F = 20 N
- The force of friction, , backward
So, the equation of motion for the box is
where
m = 5.0 kg is the mass of the box
a is its acceleration
The box is sliding at constant velocity: this means that its acceleration is zero
a = 0
So, the equation becomes
Therefore, we can find the magnitude of the force of friction: