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A speeder is pulling directly away and increasing his distance from a police car that is moving at 29 m/s with respect to the ground. The radar gun in the police car emits an electromagnetic wave with a frequency of 9.00 x 109 Hertz. The wave reflects from the speeder's car and returns to the police car, where its frequency is measured to be 320 Hertz less than the emitted frequency. Determine the speeder speed with respect to the ground.
m/s
The velocity vs time graph of an object is approximated by a triangle which starts at v=0 at t=0, rises to a maximum of v=6 m/s at t=6 sec, then returns to zero at t=10 sec. How far did the object travel?
A lamp (R = 147 ), anelectric heater (R = 26),and a fan (R = 48 ) areconnected in parallel across a 115 Vline. what total current is supplied to the circuit? what is the voltage across the fan?
A meter stick lies on the bottom of a 100 cm long tank with its zero mark against the left edge. You look into the tank at a 30 angle, with your line of sight just grazing the upper left edge of the tank.
When four people with a combined mass of 320 kg sit down in a car, they find that the car drops1.00 cm lower on its springs. What is the frequencyof the car's vibration
A uniform magnetic field is decreasing at a rate of 0.23T/s. What is the magnitude of the induced electric field at a distance of 3.0 cm from the center of the magnetic field
using a 60 cm focal length converging lens one wishes to obtain a virtual image which is four times as large as the
What is the terminal speed for a 76.0 skier going down a 41.0 snow-covered slope on wooden skis = 0.070? Suppose that the skier is 1.80 m tall and 0.500 m wide. Replace mg with net forces parallel to the incline.
A mechanic pushes a 2.8 103 kilogram sports car from rest to a speed of v, doing 5400 Joule of work in the process. Determine the horizontal force exerted on the sports car
A thin uniform rod has a length of 0.510m and is rotating in a circle on a frictionless table. The axis of rotation is perpendicular to the length of the rod at one end and is stationary. What is the mass of the rod and bug
A lead block is suspended from the underside of a 0.8 kg block of wood of density of 720 kg/m3. what is the mass of the lead block
A block is suspended from a string connected to a balance. While in air, the scale reads 350 N. What is the buoyancy force on the object when immersed in water
A softball of mass 0.220kg that is moving with a speed of 8.5m/s collides head-on and elastically with another ball initially at rest. Calculate the mass of the target ball
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