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A 77.5 kg bobsled is pushed along a hor- izontal surface by two athletes. After the bobsled is pushed a distance of 5.0 starting from rest, its speed is 6.7 m/s.
Find the magnitude of the net force on the bobsled.
A rock of mass 33 kg accidentally breaks loose from the edge of a cliff and falls straight down. The magnitude of the air resistance that opposes its downward motion is 242 N. What is the magnitude of the acceleration of rock.
A mortar* crew is positioned near the top of a steep hill. Enemy forces are charging up the hill and it is necessary for the crew to spring into action. How far down the hill does the shell strike
A ferromagnetic metal at very low temperatures has a specific heat capacity given by c(T)= zT+yT^3+zT^(3/2). find the entropy increase due to this process
As you travel every day to campus, the road makes a large turn thatis approximately an arc of a circle. What is the maximum safe speed forthe turn when the road is wet
A hunter wishes to cross a river that is 1.4km wide and flows with a speed of 5km/h parallel to its banks.
The center of mass of a system consisting of two spheres is moving in the +x direction with a speed of 6.6 m/s. What is the total momentum of the system
An ?-particle has a charge of +2e and a mass of 6.64 multiply.gif 10-27 kg. It is accelerated from rest through a potential difference that has a value of 1.12 multiply.gif 106 V, What is the radius of its circular path
A certain type of laser emits light that has a frequency of 4.9 × 1014 Hz. How many wavelengths are there in one pulse
If the coefficient of kinetic friction between tires and dry pavement is 0.82, what is the shortest distance in which you can stop an automobile by locking the brakes when traveling at 26.6 m/s
An oxygen molecule has a vibrational mode that behaves approximately like a simple harmonic oscillator with frequency 2.99 X 10^14 rad/s. Calculate the energy of the ground state
The only force acting on a 2.7 kg canister that is moving in an xy plane has a magnitude of 2.7 N. The canister initially has a velocity of 3.0 m/s in the positive x direction, and some time later has a velocity of 7.4 m/s in the positive y direct..
An isolated copper sphere of radius 4.85cm, at first uncharged, is illuminated by ultraviolet light of wavelength 244nm. The work function for copper is 4.70 eV. What charge does the photoelectric effect induce on sphere.
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