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1. An astronomer observes a comet and measures the wavelength of the H? line to be at 486.2 nm. In the lab, the line is found to be at 486.1 nm.
Is the comet moving towards or away from us?
What is the comet's radial velocity?
What fraction of the speed of light is this?
What is the Lorentz factor for the comet?
Would the astronomer expect the comet to be noticeably length contracted? Why or why not?
A cord passes over a weightless and frictionless pulley. Masses of 200 and 300 grams are attached to the ends of the cord. Find the distance the masses will move during the fifth second after they had started.
Two charged plates create a potential difference of 190 V. At a point halfway between the plates an electron is released from rest. What was the initial speed and direction of the proton
A car is parked on a cliff overlooking the ocean on an incline that makes an angle of 24.0° below the horizontal, Find the length of time the car is in the air
A proton (mass 1.67 × 10 ?27kg) is moving at 1.15 ×10 ?6m/s directly toward a stationary helium nucleus (mass 6.64 × 10 ?27kg). After a head-on elastic collision, what is the helium's velocity
Light from the sun allows a solar cell to move electrons from the positive to the negative terminal, determine the emf of this solar cell
A vertical scale on a spring balance reads from 0 to 175. The scale has a length of 12 from the 0 to 175 reading. A fish hanging from the bottom of the spring oscillates vertically at a frequency of 2.8.
For the circuit shown below, C = 0.113 µF and = 103 V. The switch throw is rotated to contact b after having been at contact for the long time, and 3.47s later the potential difference across the capacitor is equal to 1/2. What is the value of R.
A homogeneous disk of radius R and mass M rolls without slipping on a horizontal surface and is attracted to a point a distance d below the plane. find the frequency of oscillations around the position of equilibrium
Seismic p-waves travel at abou 6 km/s and s-waves at 4 km/s. how far away was the earthquake that produced them
A 3.9 kg block originally at rest is pulled to the right along a horizontal, frictionless surface by a constant, horizontal force of 18 N.
A large tank of water is full and has a depth of 10.0 m. What is the pressure at the bottom of the tank
Analysis of Physics, Two pistons push down on the fluid filling two cylinders connected by a narrow hose, as shown in the figure. The area A1 is 1 square inch, and the area A2 is 10 square inches
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