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A 921 kg car is moving rightward with a speed of 29.0 m/s. The driver slams on the brakes and the car skids to a stop over the course of 3.20 seconds with the wheels locked. Determine the average resistive force acting upon the car.
The longest recorded pass in an NFL game traveled 86 yards in the air from the quarterback to the receiver.Assuming that the pass was thrown at the optimal 45 angle, what was speed at which the ball left the quarterback's hand.
A hydrogen atom in its ground state absorbs a photon with an energy of 26 eV, What is the kinetic energy of the ejected electron
A geological survey ship mapping the floor of the ocean sends sound pulses down from the surface and measures the time taken for the echo to return. How deep is the ocean at a point where the echo time (down and back) is 7.07 s
A child in danger of drowning in a river is carried downstream by a current that flows uniformly with a velocity of 2.0 meters per second.
A particle of charge +2.56 x 10-6 C is 12.4 cm distant from a second particle of charge -1.55 x 10-6 C. Calculate the magnitude of the electrostatic force between the particles
A professor's office door is 0.98m wide, 2.2mhigh, 4.0cm thick; has a mass of 29kg , and pivots on frictionless hinges. What is the moment of Inertia on the door
A top spins at 28 rev/s about an axis that makes an angle of 33° with the vertical. The mass of the top is 0.44 kg, What is the precession rate
A hockey puck sliding on a frozen lake comes to rest after traveling 200m . If it's initial velocity is 3.0 m./s, How long is it's motion
With each cycle, a 2430-W engine extracts 2080 J from a thermal reservoir at 90 °C and expels 1510 J into a thermal reservoir at 20 °C. How much time does each cycle take
A cycle receives 500 Btu of heat at 1000°F and rejects 200 Btu of heat at 200°F. There is work input of 275 Btu and work output of 575 Btu. Compute the cycle efficiency
For research purposes a sonic buoy is tethered to the ocean floor and emits an infrasonic pulse of sound. Determine the wavelength of the sound
A proton traveling with a velocity of 6.20x10^6 m/s in the positive x direction encounters a uniform 0.25 magnetic field in the positive y direction
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