Physics Relativity Level: High School
At what speed does a clock have to move in order to be seen to run at a rate that is one-half the rate of a clock at rest ?
Physics Relativity Level: High School
A rocket moves with a velocity of 0.92 c to the right with respect to a stationary observer A. An observer B moving relative to observer A finds that the rocket is moving with a velocity of 0.95 c to the left . What is the velocity of the observer B relative to observer A ? (Hint : Consider observer B’s velocity in the frame of reference of the rocket ? )
Physics Relativity Level: High School
A supertrain of proper length 100 m travels at a speed of 0.95 c as it passes through a tunnel having proper length 50.0m. As seen by a trackside observer , is the train ever completely within the tunnel ? If so , by how much ?
Physics Relativity Level: High School
A certain quasar recedes from Earth at v = 0.870 c . A jet of material ejected from the quasar back toward Earth moves at 0.550 c relative to the quasar . Find the speed of the ejected material relative to earth ?
Physics Relativity Level: High School
A rocket moves with a velocity of 0.92 c to the right with respect to a stationary observer A. An observer B moving relative to observer A finds that the rocket is moving with a velocity of 0.95 c to the left . What is the velocity of the observer B relative to observer A ? (Hint :Consider observer B’s velocity in the frame of reference of the rocket ? )
Physics Relativity Level: High School
A supertrain of proper length 100 m travels at a speed of 0.95 c as it passes through a tunnel having proper length 50.0m . As seen by a trackside observer, is the train ever completely within the tunnel ? If so , by how much ?
Physics Relativity Level: High School
A noted physicist was stopped by police for traveling through a red traffic light . The physicist urged that to because he was traveling fast the colour of the light had changed from the red wavelength to that of a green wavelength . The judge said he would let him off the charge of running a red light , but would fine him for speeding at the rate of one cent of every km/hr he was traveling over 100 km/hr .Was he fined ? and how much was his fine ?
(Assume c = 3 x 10^9 ms-1; Frequency of red light = 4.5 x 10^14 Hz ; Green light = 6.0 x 10^14 Hz )
Physics Relativity Level: High School
Two twins , Bill and Ben are 18.0 years old and they leave Earth for a distant planet 10.0 light years away. The twins depart at the same time on Earth , and travel in different space ships . Bill travels at 0.90 c , while Ben travels at 0.50 c . What is the difference between their ages when Ben arrives on the new planet ?
Physics Relativity Level: High School
Suppose the speed of light was 120 kmhr^-1 .a. How would a length of a bus traveling at 110 kmhr^-1 appear to some one standing on the side of the road ?
b. If your mass was 65 kg on getting on the bus , what would it appear to be from the point of view of someone standing on the side of the road ?
c. How long would it seem to take the bus to travel from Brisbane to Sydney (a distance of 1000 km ) if the average speed was 100 kmhr^-1?
Physics Relativity Level: High School
Later in the journey , Ken , a crewmember on the starship , receives a worried e-mail from his girlfriend , on Earth , because Ken appears to have put on twenty per cent more weight as when he left earth . But when Ken looks in the mirror , he sees no difference . What speed is Ken likely to be traveling ?(a) How would Barbie describe Ken now ?
Physics Relativity Level: High School
On Earth, the crew of the starship MacGregIV has an average mass of 55 kg . What do you expect their mass to be traveling at 0.90 c ?
Physics Relativity Level: High School
As the starship passes by the moon at 0.90 c , the moon base measures the length of the starship as 160 m . What do you expect the length of the starship to have been when it was made on earth ?
Physics Relativity Level: High School
On the starship MacGregIV , Which travel at 0.90 c , dinner is served between 8:00 pm, and 8:45 pm according to the clock on the ship . How long is dinner served according to stationary observers on Earth watching the ship on a video monitor ?
Physics Quantum Mechanics Level: High School
An electron is in the n = 2, I = 1, m = 0 state of the hydrogen atom . What is its wave function in momentum space ?
Physics Misc Topic Level: Misc Level
Find the probability that a one-dimensional simple harmonic oscillator in its ground state will be found in the classically forbidden region .