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In a head-on collision, a car stops in 0.23 s from a speed of 11 m/s. The driver has a mass of 90kg {\rm kg}, and is, fortunately, tightly strapped into his seat.
1. What force is applied to the driver by his seat belt through that fraction of a second?
A parallel plate capacitor has a capacitance of 2 µF when the plates are seperated by a vacuum. What is the electric field with the slab in place
an athlete executing a long jump leaves the ground at a 32.5 degree angle and travels 7.67 meters.what was the take off
A golf ball strikes a hard, smooth floor at an angle of 22.1 ° and, as the drawing shows, rebounds at the same angle. The mass of the ball is 0.0342 kg, and its speed is 47.5 m/s just before and after striking the floor
A 14000 kg railroad car travels alone on a level frictionless track with a constant speed of 24.0 m/s. A 6500 kg load, originally at rest, is dropped onto the car. What will be the car's new speed?
The current in a circuit is tripled by connecting a 500-ohm resistor in parallel with the resistance of the circuit. Determine the resistance of the circuit in the absence of the 500-ohm resistor.
You take a trip to Pluto and back (round trip 11.5 billion km), traveling at a constant speed (except for the turnaround at Pluto) of 44500 km/hr. How long does the trip take, in hours, from the point of view of a friend on earth
What is the temperature of a sample of gas, when the average translational kinetic energy of a molecule in the sample is 8.01 × 10-21 J? What is the total translational kinetic energy, in kilojoules, of all the molecules of this sample, when it conta..
In 1990 Walter Arfeuille of Belgium lifted a 281.5-kg object through a distance of 17.1 cm using only his teeth. How much work was done on the object by Arfeuille in this lift, assuming the object was lifted at constant velocity?
on a frozen pond a 10kg sled is given a kick that imparts to it an intial speed of v0 2.0ms. the coefficient of the
A large storage tank, open at the top and filled with water,develops a small hole in its side at a point 15.4 m below the water level. If the rate of flow from the leak is equalto 2.80*10-3 m3/min, determine thespeed at which the water leaves the ho..
Three charges are situated at corners of a rectangle. How much energy would be expended in moving the 8µC charge to infinity.
A liquid with a specific gravity of 0.72 is flowing at 5.5 ft/sec through a 6 inch diameter pipe (ID=6.065 inches). What is the volumetric flow rate
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