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A person who is properly constrained by an over-the-shoulder seat belt has a good chance of surviving a car collision if the deceleration does not surpass 27.0 "g's"(1.00 g= 9.80m/s2). Assuming uniform deceleration of this value, compute the distance over which the front end of the car should be designed to collapse if a crash brings the car to rest from 110km/hr.
The maximum characteristic x-ray photon energy comes from the capture of a free electron into a K shell vacancy. What is this photon energy in keV
A father (m = 70 kg) and son (m = 45 kg) are standing facing each other on a frozen pond. The son pushes on the father and finds himself moving backward at 3 m/s after they have separated. How fast will the father be moving.
a particle of mass m is subject to the delta-function potential vx -alpha deltax with alpha gt 0. evaluate the
A girl is sledding down a slope that is inclined at 30º with respect to the horizontal, The combined mass of the girl and the sled is 76.5 kg, How much time is required for the sled to travel down a 149-m slope, starting from rest
A cannonball is shot (from ground level) with an initial horizontal velocity of 34.0 m/s and an initial vertical velocity of 25.0 m/s. find the maximum height the cannonball goes above the ground
Two narrow slits separated by 0.51 mm are illuminated by monochromatic light of wavelength 670 nm. How many bright fringes can be seen on a screen 1.3 cm wide placed 1.1 m in front of the slits.
A particle is located at the vector position r=(4.00i+6.00j)mand a force exerted on it is given by F=(3.00i+2.00j)N. What is the torque acting on the particle about the origin? Can there be another point about which the torque caused by thisforce on..
The label on a commercially purchased radioactive sample gives its activity as 16 µCi. The half-life of the sample is 60 days. How old is the sample
A 2.0kg wood block is launched up a wooden ramp that is inclined at a 33 angle. The block's initial speed is 14. What speed does it have when it slides back down to its starting point
a spring is hanging down from the ceiling and an object of mass m is attached to the free end. the object is pulled
A 3m-long, 300 steel beams extend horizontally from the point where it has been bolted to the framework of a new building under construction. A 73 construction worker stands at the far end of the beam. What is the magnitude of the torque about poi..
An elevator moves downward in a tall building at a constant speed of 4.35 m/s. Estimate the highest floor from which the bolt can fall
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