Saturday
April 19, 2014

Homework Help: Physics

Posted by Anonymous on Tuesday, November 29, 2011 at 2:25pm.

An early method of measuring the speed of light makes use of a rotating slotted wheel. A beam of light passes through one of the slots at the outside edge of the wheel, travels to a distant mirror, and returns to the wheel just in time to pass through the next slot in the wheel. One such slotted wheel has a radius of 8.0 cm and 950 slots at its edge. Measurements taken when the mirror was l = 500 m from the wheel indicated a speed of light of 3.0 105 km/s.

(a) What was the (constant) angular speed of the wheel (in rad/s) ?

(b) What was the linear speed of a point on the edge of the wheel (in m/s) ?


This is my work:

(a)

d=2*L
d=2*500m
d=1000m

t=L/c
t=500m/(3*10^8m/s)
t=0.000002s

angular speed=rw
Where do I go from here?

Answer this Question

First Name:
School Subject:
Answer:

Related Questions

Physics - n early method of measuring the speed of light makes use of a rotating...
Physics - When you approach a blinking source of light, the frequency of its ...
physics - A certain spaceship has a speed of 18200 mi/hr. What is its speed in ...
physics.... - Cherenkov radiation is light emitted by a particle moving through ...
physics - if the speed of light in air is3.0 by 10 to the 8 power per second ...
Physics - Find the speed of light in flint glass if the index of refraction is n...
physics - A light year (speed of light 2.998x10^8 m/s) is the distance light ...
physics - An observer uses a 10 sided mirror to measure the speed of light. A ...
speed of light - Can the speed of light be legislated? Explain your reasoning. ...
physics - The ballistic pendulum is a device used to measure the speed of a fast...

Search
Members