Other Physics Answers

A ray of light is incident through glass, with refractive index 1.52, on an interference separating glass and water with refractive index 1.32. What is the angle of refraction if the angle of incidence of the ray in glass is 25°?

The temperature of 47 degree celsius was recorded as the highest temperature in Thailand in 52 years. What is the temperature in Kelvin

If you push against a stationary car, are you doing any work?

. A man lifts a box weighing 56N through a vertical height 1.3 m and then walks horizontally for 2.2 m at constant speed while holding the box. What is the work done by the student? *

The steel rail road track is 20 cm long at 10 degree celsius. How much longer is the track at 20 degree celsius? The coefficient of linear expansion of steel is 1.27x10-5 -K.

A 0.25-kg mass at the end of a spring oscillates 2.2 times per second with an amplitude of 0.15 m. Determine (a) the speed when it passes the equilibrium point, (b) the speed when it is 0.10 m from equilibrium, (c) the total energy of the system, and (d) the equation describing the motion of the mass, assuming that at t=0, x was a maximum.

An object of unknown mass m is hung from a vertical spring of unknown spring constant k, and the object is observed to be at rest when the spring has stretch by 14 cm. The object is then given a slight push upward and executes SHM. Determine the period T of this oscillation.

To compress a spring 5.0 cm from its unstretched length, 18.0 J of work must be done. (a) What is

the magnitude of the force needed to stretch it to 7.5 cm? (b) How much work must be done in stretching this spring 7.5 cm from its unstretched length?

An object of unknown mass m is hung from a vertical spring of unknown spring constant k, and the object is observed to be at rest when the spring has stretched by 14 cm. The object is then given a slight push upward and executes SHM. Determine the period T of this oscillation.

A wall with a thermal conductivity of 0.50W/m·K is maintained at 40.0°C. The heat transfer through the wall is 250.0W. The wall surface area is 1.50m2 and its thickness is 1.00cm. Determine the temperature at the other surface.