Physics Answers

Some small aluminium rivets of total mass 170g and at 100°C are empitied into a hole a largert block of ice at 0°C. How much ice will melt?

End of A of a uniform rod AB of weight W and length a is hinged freely to a vertical wall B is connected to C on the wall by a light inextensible string of length a c is at b distant above A show the reaction of hinge at A is w/4b √[a²+8b²]

Discharging RC circuit. • In the RC circuit shown, the battery has fully charged the capacitor, so Q0 = C E. Then at t = 0 the switch is thrown from position a to b. The battery emf is 20.0 V, and the capacitance C = 1.02 μF. The current I is observed to decrease to 0.50 of its initial value in 40 μs. (a) What is the value of Q, the charge on the capacitor, at t = 0? (b) What is the value of R?  (c) What is Q at t = 60 μs? 

A neophyte player catches a 125 g ball moving at 25.0 m/s in 0.02 s. A professional player catches the same ball in 1.0 s by slightly retracting his hand during the catch. Find the forces exerted by the ball on the hands of the two players.

Two charges are separated by a distance of 0.03 meters. Identify the magnitude of the net

force exerted by each charge on one another.

q1 = +25 × 10^−9C and q2 = −75 × 10^−9C

Sodium metal has a very wide liquid range, melting point at 98⁰C and boiling point at 892⁰C. What is the liquid range in Kelvin

A charged particle in moving under the influence of a point nucleus. Find the orbit of the particle and periodic time in the case of an elliptical orbit.

Calculate the period of simple pendulum in the following lengths.

a) 3.0 m

b) 6.0

c) 9.0

d) 12.0

The swinging pendulum has a period of 4.5 s, find the length of a swinging pendulum.

A 1.5 m of pendulum is swinging on the planet Jupiter with a period of 3.7 s, calculate the value of (g) on the planet Jupiter.