Answer
Polarization is a method of restricting different plane of transverse waves into the required plane.
Polarization process is done with the help of Polaroids. Polaroids are kept at different angles, these angles are selected according to the wave requirement. Polaroids allows only waves which are aligned to it.
so, this phenomenon is the same in case of polarizing sunglasses as it restricts the unwanted sun waves to pass through it.
Correct option: A
An object remains at rest until a force acts on it.
As the water moves faster, it applies greater force on the sediment, which over comes the frictional forces between the bed and the sediment. So, when the river flows faster, more and larger sediment particles are carried away. When the flow slows down, the river couldn't apply enough force on the larger sediments which can overcome the frictional force between the sediment and the river bed. So, the net force on the heavier particles become zero. Hence, the heavier particles of the load will settle out.
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Since v = dx/dt = 200t
I took the integral of dx = integral of 200t dt
and I got x = 100t^2 + C
So I plugged in 0.5 as t and got x = 25
So x = 25 miles
Answer:
False.
Explanation:
The forces acting on the rocket would be the engine pushing it forward, but it would also be the force of gravity and air friction acting in the reverse direction of the force of the engine. And so some energy in the form of heat, vibration, etc. would be lost to these forces, and the maximum amount of work would not be converted into kinetic energy.
So it's wrong with the statement. The work done by the engine-generated power would be higher than the Kinetic energy, as some of the energy is lost to non-conservative forces (gravity, air resistance, etc.).
Answer:
Unbalanced force -
Explanation:
Unbalanced force is expected to cause a body to accelerate.