A 1,120 kg car is travelling with a speed of 40 m/s. Find its energy.
1 answer:
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Answer:
The magnitude of the electric field in the second case will be of the electric field in the first case
Explanation:
The electric field at a distance < R from the center of the sphere is given by
the formula =
where R is the radius of the sphere, and, Q is the charge uniformly distributed on the sphere.
It is given that the same charge Q is distributed uniformly throughout a sphere of radius 2R and we have to find the electric field at same distance from the center.
In the second case the electric field will be given by
=
Therefore the magnitude of the electric field in the second case will be of the electric field in the first case.
Answer:
, 48 kg
Explanation:
The density of an object is the amount of mass contained per unit of volume.
Density is given by the equation
where
m is the mass of the object
V is its volume
In this problem, we have a wooden block of dimensions:
2 m, 0.2 m, 0.2 m
So, the volume of the block is
We also know that the density of the block is
Therefore, the mass of the block is