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1) Waves moving on a lake have a speed of 2.3 m/s and a distance of 1.8 m between adjacent crests.
(a) What is the frequency of the waves?
Hz
(b) Find the period of the wave motion.
s
2) Compute the wavelength of the radio waves from the following stations.
(a) an AM station operating at a frequency of 850 kHz
m
(b) an FM station with a frequency of 99.5 MHz
A rifle with a weight of 30 N fires a 5.0-g bullet with a speed of 300 m/s. If a 700-N man holds the rifle firmly against his shoulder, find the recoil speed of the man and rifle
The threshold of dark-adapted (scotopic) vision is 4.0 multiplied by 10-11 W/m2 at a central wavelength of 500 nm. how many photons per second enter the eye
An average temperature of the rest of the universe
A gun is fired vertically into a 1.9 kg block of wood at rest directly above it. If the bullet has a mass of 21.00 g and a speed of 195 m/s, how high would the block rise into the air after the bullet becomes embedded in it.
q1. a heavy rope used for as a mooring line for a cruise ship sags a shown. if the mass of the rope is 96 kg what are
You find an unlabeled box of fine needles, and want to determine how thick they are. What is the diameter of the needle
The pressure of an ideal gas remains at 200 Pa while 1000 joules of heat are removed and its internal energy increases by 2000 joules. What was the change in the volume of the gas
A 2.70 kg box slides down a rough incline plane from a height h of 1.87 m. Calculate the mechanical energy lost due to friction
The outside mirror on the passenger side of a car is convex and has a focal length of -8.5 m. Find the image distance of the truck
A small conducting spherical shell with inner radius a and outer radius b is concentric with a larger conducting spherical shell with inner radius c and outer radius d. The inner shell has the total charge of -1q and outer shell has a total charge..
Two waves with identical frequency but different amplitudes A1 = 6.0 cm and A2 = 3.0 cm, occupy the same region of space (are superimposed). What is the amplitude of the resulting wave in that case
A charge of +378 C is fixed at the center of a square that is 0.64 m on a side. How much work is done by the electric force as a charge of +1.8 C is moved from one corner of the square to any other empty corner?
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