Physics Answers

Indicate which of the three major interaction processes

(photoelectric absorption, Compton scattering, pair production) is

dominant in the following situations:

(a) 1MeV gamma rays in aluminum.

(b) 100 keV gamma rays in hydrogen.

(c) 100 keV gamma rays in iron.

(d) 10 MeV gamma rays in carbon.

The following are sports/events that utilizes the concept of torque. Briefly explain how this concept is used.

1. Volleyball

2. Bodybuilding

3. Arm wrestling

4. Golf

5. Running

6. Car Racing

A 6 V battery is connected across three 100 ohm resistors in series. What is the current through each resistor?

There are four equal-value resistors connected in series with a 5 V source. A current of 4.63 mA is measured. What is the value of each resistor?

A steam boiler has a total volume of 3m3.the boiler initially contains 2m3 of saturated steam and 1m3 of saturated liquid at 3mpa.calculaye the mass of vapour, mass of liquid, quality of steam and specific enthalpy of steam

A body moves through a distance of 5 m and force of 2 n is applied on it calculate the magnitude of the work done on it

Point charge q1 = -6.00 * 10-6 C is on the x-axis at x = -0.200 m. Point charge q2 is

on the x-axis at x = +0.400 m. Point charge q3 = +3.00 * 10-6 C is at the origin. What

is q2 (magnitude and sign) (a) if the net force on q3 is 6.00 N in the +x direction; (b)

if the net force on q3 is 6.00 N in the -x direction?

Find out the ratio of velocities of the given signal in the core and cladding if the refractive indices are 1.5 and 1.48 respectively

Two blocks of mass and M connected by a massless spring of spring con stant & are placed on a smooth horizontal table. Determine the equations of

motion using Newtonian mechanics

The 0.5kg sphere to the right is immersed in a gravitational field created by a planet with a mass of 2x10^20kg and a radius of 3x10^4m. What is the strength of the field at the surface of the planet?