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Q. A motorcycle and a police car are moving toward one another. The police car emits sound with a frequency of 532 and has a speed of 25.5. The motorcycle has a speed of 12.50. What frequency does the motorcyclist hear in this case?
An ideal gas is enclosed in a cylinder that has a moveable piston on top. The piston has a mass of 6200 g and an area of 5 cm2 and is free to slide up and down.
How high is the sun above the horizon to a fisherman. What is the coefficient of kinetic friction between tires and pavement.
What minimum coefficient of static friction is required? Is the reply you found reasonable? In other words, is he probable to stay on the merry-go-round.
An expandable cylinder has its top connected to a spring with force constant 2 x10^3 N/m. The cylinder is filled with 6 L of gas with the spring relaxed at a pressure of 1.0 atm and a temperature of 20°C.
Assume a uniform mass distribution before and after. Icm for a solid sphere of uniform density is 2/5 mr2.
For a science fair competition, a group of high school students build a kicker-machine that can launch a golf ball from the origin with a velocity of 37.5 m/s and initial angle of 38.4° with respect to the horizontal.
A particle moving along the x axis in simple harmonic motion starts from its equilibrium position, the origin, at t = 0 and moves to the right. The amplitude of its motion is 1.70 cm and the frequency is 1.30 Hz.
Two loudspeakers are placed at either end of a gymnasium, both pointing towards each other. The sound emitted by the speakers is in phase and are of frequency of 256 Hz.
What lengths of ship three sides according to the observer
The locomotive is moving at 25 km/h. The engineer of the high speed train immediately applies the brakes. What must be the magnitude of the resulting constant deceleration if a collision is to be just avoided.
A 220 g block is attached to a horizontal spring and executes simple harmonic motion with a period of 0.150 s. If the total energy of the system is 3.50 J.
A person who weighs 680 N is riding a 98-N mountain bike. Suppose the entire weight of the rider and bike is supported equally by the two tires. If the gauge pressure in each tire is 6.45 105 Pa, what is the area of contact between each tire and the ..
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