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A bomb is designed to explode 2.00 s after it is armed. The bomb is launched from earth and accelerated to an unknown final speed. After reaching its final speed, however, the bomb is observed by people on earth to explode 2.90 s after it is armed. What is the final speed of the bomb just before it explodes?
To make a secure fit, rivets that are larger than the rivet hole are often used and the rivet is cooled (usually in dry ice) before it is placed in the hole
An air puck of mass m1 = 0.15 kg is tied to a string and allowed to revolve in a circle of radius R = 1.1 m on a frictionless horizontal table. What is the horizontal force acting on the puck
A 50 kg person performs a maximum vertical jump with an intial velocity of 2m/s. What is the performer's maximum kinetic energy during the jump
A cylindrical tank with a large diameter is filled with water to a depth D = 0.310 m. What is the rate at which water flows out, in cubic meters per second
A beam of 2-MeV neutrons is incident on a slab of heavy water (D2O). The total cross-sections of deuterium and oxygen are 2.6b and 1.6b respectively.what is the macroscopic total cross section of D2O at 2 MeV?
Electric charge Q has been spread uniformly over a circular arc of radius R and central angle 40 degrees. What is the potential at point P, center of curvature of the arc.
A 300 kg piano slides 4.50 m down a 30° incline and is kept from accelerating by a man who is pushing back on it parallel to the incline. The effective coefficient of kinetic friction is 0.40.
For a damped oscillator with a mass of 350 g, a spring constant 59.00 N/m and a damping coefficient of 89 g/s, what is the ratio of the amplitude of the damped oscillations to the initial amplitude at the end of 30 cycles.
If an electron makes a transition from the n = 4 Bohr orbit to the n = 3 orbit, determine the wavelength of the photon created in the process
Two people hear a tornado siren, What is the intensity level (in dB) at the farther listener relative to the other listener
a student stands at the edge of a cliff and throws a stone horizontally over the edge with a speed of 20m/s the stone travels 100 m horizntally and hits the beach. what is the height of the cliff
Calculate the magnetic force per meter between two such lightning bolts separated by 10 meters. (This is mainly to give a feeling for the strength of the magnetic field)
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