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In a marathon race Chad is out in front, running due north at a speed of 3.88 m/s. John is 97 m behind him, running due north at a speed of 4.60 m/s. How long does it take for John to pass Chad?
In order to calibrate the strength of an Fe-55 source, many measurements of the radiation field are made with the same detector located at different distances.
An observer on the earth sees a light pulse within a space ship moving at a constant speed of one-half the speed of light (0.5c). What speed does the observer measure for the light pulse
On an airplane's takeoff, the combined action of the air around the engines and wings of an airplane exerts an 8020-N force on the plane, focussed upward at the angle of 55.0° above the horizontal. The plane rises with constant velocity in the vertic..
Two streams of air, one at 1 bar, 27C and velocity of 30 m/s and the other at 5 bar, 227C and 50 m/s velocity, Find the velocity of the stream issuing out of the nozzle
The speed of the fastest-pitched baseball was 45.0 m/s , and the ball's mass was 145g. How many joules of kinetic energy did this ball have
If you were to send a beam of laser light to a space station above an atmosphere and just above the horizon, would you aim the laser above, below or at the visible space station.
An air conditioner draws 15 A at 220-V ac. The connecting cord is copper wire with a diameter of 1.446 mm. how much power is dissipated in the wiring
A light ray of wavelength 589 nm is incident at an angle ? on the top surface of a block of polystyrene surrounded by air. What happens if the block is immersed in carbondisulfide
A target in a shooting range consists of a square wooden board of side length S = 0.500 meter and mass mT = 0.750 kg, find the angular speed of the target just after the collision
A conducting spherical shell of inner radius b and outer radius c is concentric with a small metal sphere of radius a
A helicopter is ascending perpendicularly with a speed of 5.02 {rm m/s}. At a height of 115 {rm m} above the Earth, a package is dropped from the window.
What is the rms speed of nitrogen molecules contained in an 7.9 m3 volume at 2.1 atm if total amount of nitrogen is 1100 mol.
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