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An automobile delivers 30.0 hp to its wheels when moving at a constant speed of 22.0 m/s. What is the resistance force on the automobile at this speed? (1 hp=746 watts)
A 16-cm-diameter cylinder that is 39cm long contains 60g of oxygen gas at 20?C, What is the number density of the oxygen
A pendulum of length 2.0 m is held out to point A
A square loop (length along one side = 20 cm) rotates in a constant magnetic field which has a magnitude of 2.0 T. At an instant when the angle between the field and the normal to the plane of the loop is equal to 20? and increasing at the rate of 10..
in a game of basketball, a forward makes a bounce pass to the center. What horizontal distance does the ball cover before bouncing
question a rocket fires two engines simultaneously. one produces a thrust of 725n directly forward while the other
a 1200 kg automobile moving at 25 ms has it brakes applied with a deceleration of 8.0 ms2. how far does the car travel
In 0.675 s, a 6.80-kg block is pulled through a distance of 4.10 m on a frictionless horizontal surface, starting from rest. By how much does the spring stretch
question a 10-kg box moving at 5 ms on a horizontal frictionless surface runs into a light spring of force constant 100
what are the three longest wavelengths for standing sound waves in a 121-cm-long tube that is a open at both ends and b
Suppose a star with radius 8.61 108 m has a peak wavelength of 686 nm in the spectrum of its emitted radiation. What is the surface temperature of the star
The half-life of Uranium(238 upper index 92 lower index) against alphy decay is 4.5x10^9 yr. How long does it take for seven-eigths of a sample of this isotope to decay
A irregular piece of metal has a dry mass of 5.7 kg. Once it is submerged it has an apparent mass of 2.4 kg. What is the density of the piece of metal
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