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A bird is flying directly toward a stationary bird-watcher and emits a frequency of 1000 Hz. The bird-watcher, however, hears a frequency of 1015 Hz. What is the speed of the bird, expressed as a percentage of the speed of sound?
question1a golf ball with an initial angle of 30deg lands exactly 214 m down range on a level course.a neglect air
An ideal gas is brought through an isothermal compression process, what are the temperature T of the gas and the final pressure, Pf
q1. a 0.48 kg object is attached to a spring with a spring constant 178 nm so that the object is authorized to move on
What is the charge on each electrode.
You toss a ball up in the air with an initial velocity of 8 m/s (immediately after leaving your hand). Use gravity = -9.8 m/s2. What is its acceleration at its peak height
The distance between atoms in a solid is typically around 2.0 x 10-10 m What is the wavelength of an electron with a kinetic energy of 110 eV
A 1,8000-kg SUV rounds a flay (unbanked) curve with a radius of 90m. the average coefficients of kinetic and static friction between the tire of the car and the road are static coefficient = 0.85, What is the maximun driving speed for the car
When spiking a volleyball, a player changes the velocity of the ball from 4.0m/s to -28m/s along a certain direction. what is the mass of the volleyball
There is evidence that elephants communicate via infrasound, Determine the intensity level of the infrasound 10 km from the source, assuming the sound energy radiates uniformly in all directions
Before beginning a long trip on a hot day, a driver inflates an automobile tire to a gauge pressure of 2.60 atm at 300 K. what is the temperature of the air inside the tire
A dart is thrown horizontally with an initial speed of 16 m/s toward point P, the bull's-eye on a dart board. It hits at point Q on the rim, How far away from the dart board is the dart released
A 2.0 kg ball is attached to a vertical post with two strings, one 2 m long and the other 1 m long. If the ball is set whirling in a horizantal circle, find the tension on each string
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