Physics Answers

How much time does a meter stick moving at 0.1c relative to an observer take to pass the

observer? The meter stick is parallel to its direction of motion.

A spacecraft antenna is at an angle of 10◦

relative to the axis of the spacecraft. If the

spacecraft moves away from the earth at a speed of 0.70c, what is the angle of the antenna

as seen from the earth?

In the Michelson-Morley experiment, the length of the paths of the two beams is 11 m each.

The wavelength of the light used is 6000 ̊A. If the expected fringe shift is 0.4, calculate the

velocity of the earth relative to the ether.

Light that is nonpolarized has an intensity of 6.0 W/m2. Rays of this

light are incident on two polarizing elements whose transmission

axes are at an angle of 450. What is the intensity of light emerging

from the second film?

A coin lying on a meterstick starts to slide down when one end of the stick is raised 36.4cm above the horizontal. Find The limiting angle for friction and the coefficient of starting friction

A coin lying on a meterstick starts to slide when one end of the stick is raised 36.4 cm above the horizontal. (a) What is the limiting angle for friction? (b) What is the coefficient of starting friction?

A coin lying on a meterstick starts to slide down when one end of the stick is raised

36.4cm above the horizontal. Find

a) The limiting angle for friction

b) The coefficient of starting friction

A fighter jet takes-off from an aircraft carrier and climbs in the air with an angle of 42.1 degrees above the horizontal and a speed of 122 m/s.The speed and direction of the jet constitutes a vector quantity known as the velocity.What is the horizontal component of the plane's velocity?

An air bubble of volume 0.5cm3 when released at the bottom of a lake rise's to the surface of the lake.Explain why

An air filled with 75 microfarad has a voltage of 12V. An insulator with dielectric constant of 1.00095 is inserted between the metal plates. Calculate the capacitance. What is the new voltage across the capacitor? Calculate the original charge on the capacitor. How much charge is currently on the capacitor