decreases to (1/3) of its original value, then the executing S.H.M is V. If the amplitude is doubled and the time period of oscillation Velocity of a particle 18V (b) 6V (a) (d) d) 3V

An astronomer on Earth observes red light at 680 nm from a distant galaxy. The astronomy knows that the red light that was emitted from the galaxy source was 656 nm. The speed of light is 3E[8] m/s. Pretend that the Earth is stationary. What is the velocity of the galaxy as measured from Earth and is it approaching or receding?

pion is an unstable sub-atomic particle commonly produced in high-energy physics experiments. How fast must a pion be moving on average to travel 25 m before it decays? The average lifetime, at rest, is 26.0 ns

A train, which is 200 m long, approaches a tunnel, which is 120 m long. The train is moving at a velocity of 0.89 c. a. What is the length of the train as seen be someone standing at the entrance to the tunnel? m b. Is the train ever entirely inside the tunnel as seen be the observer at the entrance to the tunnel? ONLY 1 ATTEMPT IS ALLOWED FOR THIS PART. ---Select--- v c. What is the length of the tunnel as seen be a passenger on the train? m d. Is the train ever entirely inside the tunnel as seen by the passenger on the train? ONLY 1 ATTEMPT IS ALLOWED FOR THIS PART. ---Select--- v

A family brought their grandfather clock from Denver, Colorado to Clarksville, TN when they moved. Shortly afterwards, they discovered that the clock no longer ran accurately due to a change in the local g value. Do you expect the clock runs faster or slower? How do you fix the problem, moving the oscillating piece up or down? The clock runs faster. Moving the oscillating mass up slightly so the rod is shorter. Moving the oscillating mass down the rod slightly so the rod is longer. The clock runs slower. 1. Yes. 2. No.

Events 1 and 2 are exploding firecrackers that each emit light pulses. In the reference frame of the detector, event 1 leaves a char mark at a distance 3.40 m from the detector, and event 2 leaves a similar mark at a distance 2.10 m from the detector. If the two events are simultaneous in the reference frame of the detector and occur at instant t = 0, at what instant of time will each light pulse be detected?