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Car 1 weighs 4800 lbs and car 2 weighs 3900 lbs. after this accident car 1 skids for 50 feet and car 2 for 70 feet. The cars have the same braking system and a test skid yields a distance of 42 feet with an initial velocity of 30 MPH. What were the initial velocities of these two cars before the accident?
Water is drawn from a well in a bucket tied to the end of a rope whose other end wraps around a solid cylinder of mass 50 kg and diameter 25 cm. As this cylinder is turned with a crank, the rope raises the bucket.
A spaceship is 1600 m long when it is at rest. When it is traveling at a certain constant speed its length is measured by external observers and it is found to be 1370 m. find the speed of the spaceship in terms of the speed of light
A projectile that is fired from a gun has an initialvelocity of 90.0 km/h at an angle of 60.0o above thehorizontal. When the projectile is at the top of its trajectory, aninternal explosion causes it to separate into two fragments ofequal mass.
A parallel- plate,air-gap capacitor has a capacitance of 28 pF. The platesare separated by 1.2mm. (1 pF = 1 x 10-12F, 1 mm = 1 x10-3m) What is the area of each plate? What is the charge on each plate if the potential difference is 75V?
a solid sphere of radius 49 cm has a total pos- itive charge of 33.1 oc uniformly distributed throughout its volume.
A sphere of radius a has a radial polarization given by P = \(\alpha r^{n} \) ^r (r_hat) , where \(\alpha\) and n are constants and n is greater than or equal to 0. Find the bound volume and surface charge densities. Find E inside and outside th..
You attach a 100 gram mass to a spring and it stretches 4cm. What is the spring constant? If you set the spring in simple harmonic motion, what will the period and frequency be
An engine with an output of 170 W has an e?ciency of 45 %. It operates at 12 cycles/s. How much heat is absorbed in each cycle
A penny has a mass of 2.5 and is 1.5 thick; a nickel has a mass of 5.7 and is 1.9 thick. how far above the tabletop is the center of gravity of the stack
A compound microscope has the objective and eyepiece mounted in a tube that is 18.0 cm long. The focal length of the eyepiece is 2.28 cm, what is the focal length of the objective
Blocks with masses of 4.0, 8.0, and 9.0 are lined up in a row on a frictionless table. All three are pushed forward by a 16 force applied to the 4.0 block. How much force does the 8.0 block exert on the 8.0 block.
Find the forces that act on each of the three charges. a) q = -1.0 µC in vector form b) q= 3 µC in vector form b) q =5 µC in vector.
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