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1. Jane waits on a railroad platform while two trains approach from the same direction at equal speeds of 11.90 m/s. Both trains are blowing their whistles (which have the same frequency), and one train is some distance behind the other. After the first train passes Jane but before the second train passes her, she hears beats of frequency 6.50 Hz. What is the frequency of the train whistles?
2. Two point sources are in phase and emit a 406 Hz tone. What is the phase difference at a point that is 2.0 m from one source and 9.0 m from the other? (Take the air temperature to be 20°C.) in rad?
In a bicycle race, the leader is travelling with a constant velocity of 11.10 m/s and is 10.0 m ahead of the second-place cyclist. The second place cyclist has a velocity of 9.50 m/s and an acceleration of 1.20 m/s squared. How much time elapses b..
A block is attached to a ceiling by a spring fo force constant k. When pulled down and released the block undergoes simple harmonic motion. The amplitude is 2, and the frequency is 1/(16pi). If the mass of the block is 3.14 kg, what is the spring ..
Regarding the Earth and a cloud layer 800 m above the Earth as the "plates" of a capacitor, calculate the capacitance of the Earth-cloud layer system. What is the maximum charge the cloud can hold
Three moles of an ideal monatomic gas expands at a constant pressure of 2.00atm ; the volume of the gas changes from 3.40×10?2m3 to 4.60×10?2m3. Calculate the amount of work the gas does in expanding
Calculate the total fraction of the initial kenetic energy of the cue ball dissipated by frictional forces between the felt of the table and the two balls spinning or sliding, before they finally attain rolling without slipping at their respective ..
An attacker at the base of a castle wall 3.60 m high throws a rock straight up with speed 8.00 m/s from a height of 1.50 m above the ground. Find the change in speed of a rock thrown straight down from the top of the wall at an initial speed of 8.0..
A toy train rolls around a horizontal 1.5-m-diameter track.The coefficient of rolling friction is 0.15. What is the magnitude of the train's angularacceleration after it is released in rad/s2?
light with a frequency of 5.40 x 10^14 Hz travels in a block of glass that has an index of refraction of 1.52, what is the wavelenght of the light in vacuum
Calculate the volume of the cylinder geometrically. Calculate the density of water using the data for its volume and mass
A high-tension power line composed of aluminum wire with cross-section area 24 x10?6 m2 carries a current of 1100 A. What is the power loss over 50 km of wire
You look up towards the moon which is at a distance of 380000 km from you. The pupil of your eye has a diameter of 3mm. What is the minum distance between two objects
A certain roller coaster accelerates it's cars 6.35 m/s2 up to the first incline. If this acceleration happens during the first 7 secs of the ride, how much does the speed of the roller coaster cars increase
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