Gravitation — Physics STD 11 Science — Question

Given below are some examples of wave motion. State in each case if the wave motion is transverse, longitudinal or a combination of both:
(a) Motion of a kink in a longitudinal spring produced by displacing one end of the spring sideways.
(b) Waves produced in a cylinder containing a liquid by moving its piston back and forth.
(c) Waves produced by a motorboat sailing in water.
(d) Ultrasonic waves in air produced by a vibrating quartz crystal.

A capacitor has capacitance C. Is this information sufficient to know what maximum charge the capacitor can contain? If yes, what is this charges? If no, what other information is needed?

A retarding force is applied to stop a motor car. If the speed of the motor car is doubled, how much more distance will it cover before stopping under the same retarding force?

Galileo was punished by the Church for teaching that the sun is stationary and the earth moves around it. His opponents held the view that the earth is stationary and the sun moves around it. If the absolute motion has no meaning, are the two, viewpoints not equally correct or equally wrong?

What is parking orbit?

What is the acceleration of a train travelling at 50ms^-1 as it goes round a curve of 250m radius?

Why the speed of an object can never be negative?

If the earth's satellite is put into an orbit at a height where resistance due to atmosphere cannot be neglected, how will motion of satellite be affected?

The Young's Modulus of elasticity of a wire is Y. There is an increase in length when the wire is stretched by a force F. Write the formula of elastic potential energy of a stretched wire.