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A person who is properly restrained by an over-the-shoulder seatbelt has a good chance of surviving a car collision if the deceleration does not exceed 30 "g's"(1.00g = 9.80 m/s2). Assuming uniform deceleration of this value, calculate the distance over which the front end of the car must be designed to collapse if a crash brings the car to rest from 110 km/h.
Two small charged balls have a repulsive force of 0.18N when they are separated by a distance of 0.85m. How far apart are they now
A potential cannon is created to shoot charged balls straight upward. What is the maximum height, above the end of the cannon, it will reach
One displacement vector A has magnitude of 2.78 km and point due north. Another displacement vector B has a magnitude of 7.40 km and also points due north. Provide diagrams and calculate the magnitude and direction of A+B, B-A, A-B.
Measurements of the radioactivity of a certain isotope tell you that the decay rate decreases from 8305decays per minute to 3080 decays per minute over a period of 5.00 days
A double slit separated by 0.0572 mm is placed 1.70 m from a screen. (a) If yellow light of wavelength 590 nm strikes the double slit, what is the separation between the zeroth-order and first-order maxima on the screen? cm (b) If blue light of wavel..
q1. a 3.10-m-long 310 kg steel beam extends horizontally from the point where it has been bolted to framework of a new
fish tank filled with water is made of flat glass walls of n = 1.52. What is the maximum angle of incidence for a light ray
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
A car (m = 700.0 kg) accelerates uniformly from rest up an inclined road which rises uniformly, to a height, h = 42.0 m. Find the average power the engine must deliver to reach a speed of 20.3 m/s at the top of the hill in 24.5 s
A white billiard ball with mass mw = 1.52 kg is moving directly to the right with a speed of v = 3.22 m/s and collides elastically with a black billiard ball with the same mass mb = 1.52 kg that is initially at rest. What is the final speed of the..
Water is being pumped 100 meters up a hill through a hose at a rate of .012m^s/s. what is the water pressure at the bottom of the hose
Every year, there is a foot race to the top of the Empire State Building. The vertical distance traveled (using the stairs!) is about 440 m. what was his average power output during the race
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