: Slick Willy is in traffic court (again) contesting a $50.00 ticket for running a red light. "You see, your Honor, as I was approaching the light, it appeared yellow to me because of the Doppler effect. The red light from the traffic signal was shifted up in frequency because I was traveling towards it, just like the pitch of an approaching car rises as it approaches you." A Calculate how fast Slick Willy must have been driving, in meters per second, to observe the red light (wavelength of 692 nm) as yellow (wavelength of 570 nm). (Treat the traffic light as stationary, and assume the Doppler shift formula for sound works for light as well.) v=

Suppose an astronaut is moving relative to Earth at a significant fraction of the speed of light. (a) Does he observe the rate of his to have slowed? (b) What change in the rate of earthbound does he see? (c) Does his ship seem to him to shorten? (d) What about the distance between two stars that lie in the direction of his motion? (e) Do he and an earthbound observer agree on his velocity relative to Earth?

If a galaxy moving away from the Earth has a speed of 1000 km/s and emits 656 nm light characteristic of hydrogen (the most common element in the universe). (a) What wavelength would we observe on Earth? (b) What type of electromagnetic radiation is this? (c) Why is the speed of Earth in its orbit negligible here?

(a) Seismographs measure the arrival times of earthquakes with a precision of 0.100 s. To get the distance to the epicenter of the quake, geologists compare the arrival times of S- and P-waves, which travel at different speeds. If S- and P-waves travel at 4.00 and 7.20 km/s, respectively, in the region considered, how precisely can the distance to the source of the earthquake be determined? (b) Seismic waves from underground detonations of nuclear bombs can be used to locate the test site and detect violations of test bans. Discuss whether your answer to (a) implies a serious limit to such detection. (Note also that the uncertainty is greater if there is an uncertainty in the propagation speeds of the S- and P-waves.)

Distances in space are often quoted in units of light years, the distance ugh travels in 1 year. (a) How many meters is a light-year? (b) How many meters is it to Andromeda, the nearest large galaxy, given that it is 2.54106 ly away’ (C) The most distant galaxy yet discovered is 13.4109 ly away. How far is this in meters?

The planet Venus orbits the Sun in periodic motion (as yearly motion) and simultaneously spins about its axis (as diurnal motion). Venus has a (yearly) period of orbit of 225 days and a (diurnal) period of rotation of 243 days. So for Venus inhabitants, a day would last longer than a year! Determine the frequency of orbit and the frequency of rotation (in Hertz) on Venus. O For yearly motion 5.1 x 108 Hz, For diurnal motion — 4.8 х 108 Hz, O For yearly motion + 1.7 x 108 Hz, For diurnal motion 1.8 x 10-8 Hz, O For yearly motion → 2.5 x 106 Hz, For diurnal motion + 1.8 х 107Hz, O For yearly motion → 4.3 x 107 Hz, For diurnal motion → 48.0 x 10-7 Hz,

Part C: Short Answer- Communications 32. Describe a situation where an object is accelerating but its velocity is zero.(2) 33. In designing new aerospace launch shuttles. For the same initial upward velocities, how many times higher will a shuttle travel above the moon surface (g = 1.6 m/s² [down]) than above the surface of Earth? Assume negligible air resistance on Earth.(2) 34. High frequency, very short wavelength Gamma Rays are used to treat some types of cancer. Describe how this is possible. (3) 35. Providing examples of each, differentiate between inertial and noninertial frames of reference.(2) 36. Describe a modern technology that involves the knowledge and usage of electrical and magnetic fields?(3) 37. Looking out a train window, you see a train on the adjacent track. Explain why you think it might be the other train moving when it is really your train that has started to move.(2) 6 of 13

You are hiking along a trail in a wide, dry canyon where the outdoor temperature is T= 30.5° C. To determine how far you from the canyon wall you yell "Hello" and hear the echo t = 3.15 s later. a) calculate the speed of sound in the valley in meters per second, assuming the speed at 0 degree C is 332m/s b) how far are you from the canyon wall, in meters? c) If you stood at the same point on a cold morning where the temperature was T2 = -4.5 degrees C, how long would it taken for you to hear the echo, in seconds?

You are hiking along a trail in a wide, dry canyon where the outdoor temperature is T = 25.5° C. To determine how far you are away from the canyon wall you yell “Hello” and hear the echo t = 1.95 s later. T = 25.5° Ct = 1.95 s A. Calculate the speed of sound in the valley in meters per second, assuming the speed at 0° C is 332 m/s.  B. How far are you from the canyon wall, in meters?  C. If you stood at the same point on a cold morning where the temperature was T2 = 3.5 degrees C, how long would it have taken for you to hear the echo, in seconds?

please quickly