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A commuter train passes a passenger platform at a constantspeed of 45.0 m/s. The train horn issounded at its characteristic frequency of 320 Hz.
(a) What overall change in frequency isdetected by a person on the platform as the train moves fromapproaching to receding?
Hz
(b) What wavelength is detected by a person on the platform as thetrain approaches?
m
Consider a uranium nucleus to be a sphere of radius R = 7.4x10^-15 m with a charge of 92 e distributed uniformly throughout its volume. What is the electric force exerted on an electron
System A has a temprature of TA = 300K and Ua = 30 MJ/kmol. System B has tempratuer TB = 200K and UB = 60MJ/kmol. Describe (qualitatively) the final (equilibrium) state of the combined system
A 0.9-kg block begins to move when it is pulled by a rope on a horizontal surface by a 3-N force. What is the force of static friction acting on the block
Superheated water vapor initially at 15 bar and 440°C is cooled at constant pressure to a saturated vapor state and is then cooled at constant volume to a final temperature of 120°C, Determine the quality of the water at the final state
A hunter wishes to cross a river that is 2.0 km wide and flows with a speed of 5.0 km/h parallel to its banks. What is the minimum time necessary for crossing
A convex mirror has a focal length of -30 cm. Find the magnification produced by the mirror when the object distance is 8 cm
Consider light with an initial intensity, I0. Calculate the fraction of light that gets through the following setups: (a) A single polarizer, (b) Two polarizers with their transmission axes 30 degrees apart
What is the electric field strength between the disks. What is the speed of the box at the end of the 5.7-s interval.
The wheels, axle, and handles of a wheelbarrow weigh W = 66 N. The load chamber and its contents weigh WL = 621 N. Find the magnitude of the man's force for both designs
A ray of light strikes a thick sheet of glass (n= 1.5) At an angle of 25 degrees with the normal. Find the angle of the refracted ray within the glass
An electron on the axis of an electric dipole is 37 nm from the center of the dipole. What is the magnitude of the electrostaticforce on the electron if the dipole moment is 4.6 x10-28 C·m? Assume that 37 nm is much larger than the dipole charge se..
A diverging lens (f = -10 cm) is located 20.0 cm to the left of a converging lens (f = 31.5 cm). A 3.00 cm tall object stands to the left of the diverging lens, What is the height of the final image
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