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A 1420 kg car traveling east at 13.6 m/s has a head-on collision with a 1980 kg car traveling west at 20.5 m/s.
a) If the collision time is 0.10 s, what is the magnitude of the force needed to restrain a 69 kg person in the smaller car?
b) In the larger car?
The nucleus of the polonium isotope 214^po (mass 214u ) is radioactive and decays by emitting an alpha particle, what is the recoil speed of the nucleus that remains after the decay
In order for the turbines to work most efficiently the water should enter them at a speed of 20 m s -1. In order to achieve this the pipe narrows to what radius just before it enters the turbines?
voltage amplifier stages having the characteristics show in the following table are available. the signal source has
A toy car with a mass of 120 g moves to the right with a speed of 0.62 m/s. A small child drops a 21.0-g piece of clay onto the car, What is the change in speed of the car
Two small identical conducting spheres are placed with their centers 0.71 m apart. One is given a charge of 12*109 C, the other a charge of 17*109 C. Discover the electrostatic force exerted on one sphere by the other.
q1. chromium is produced by reacting its oxide with aluminium. if 354 g of cr2o3 and 158 g of al react to form 204 g of
macie pulls a 40 kg rolling trunk by a strap angled at 30deg from the horizontal. she pulls with a force of 40 n and
You have a grindstone ( a disk) that is 80.0 kg, has a .349-m radius, and is turning at 104.0 rpm, Calculate the angular acceleration of the grindstone
The magnetic field produced by an MRI solenoid 2.7m long and 1.7m in diameter is 1.9T. Find the magnitude of the magnetic flux through the core of this solenoid
In outer space, a baseball of mass m = 0.140 kg travels at velocity vi = (2.00 m/sec, 5.00 m/sec, 0); let the z-axis be up out of the plane of paper. calculate the average interaction force on the stick
A high-speed photograph of a club hitting a golf ball is shown in the figure below. find the average force exerted on the ball by the club
Radon is a radioactive gas, commonly found in the basement of ahouse. It has a half- life of 3.8 days. What is the decay constant of radon
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