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A race car is traveling at a constant speed around a circular track. What happens to the centripetal acceleration of the car if its speed is halved?
The magnetic field over a certain range is given by B= Bxi + Byj where Bx= 6T and By= 4T. What is the j component of the force
A 53.0 kg stunt pilot who has been diving her airplane vertically pulls out of the dive by changing her course to a circle in a vertical plane. What is the apparent weight of the pilot at the lowest point of the pullout
The plate in the problem above has a mass of 2.04 kilogram and a specific heat of 1200 J/kg°C. Determine how much heat energy is needed to heat the plate from 28°C to 580°C
A 25.0 kg gold bar at 28oC is placed in a large,insulated 0.800 kg glass container at 15.0oC with2.00 kg of water at 25.0oC. Calculate the final equilibrium
a chair of mass 11.5kg is sitting on the horizontal floor the floor is not frictionless. you push on the chair with a
Consider a fusion reaction in which two deuterium nuclei fuse to form a tritium nucleus and a proton. How much energy is released in this reaction
A cannon tilted upward at 26° fires a cannonball with a speed of 105 m/s. What is the component of the cannonball's velocity parallel to the ground
A spring of constant 290 N/m is used to launch a 1.2 kg block along a horizontal surface whose coefficient of sliding friction is 0.27
When they release their arms, Al moves off in one direction at a speed of 0.689 m/s, while Jo moves off in the opposite direction at a speed of 1.10 m/s. Assuming that friction is negligible, find out Al's mas
You are a passenger (m = 108 kg) in an airplane that is accelerating on the runway, beginning to take off. The force between your back and your seat is 405 N. how far does the plane travel as it accelerates to a takeoff speed of 125 m/s
A bird is flying due east. Its distance from a tall building is given by x(t) = 25.0m + (11.7m/s)t - (0.400m/s3)t3. What is the instantaneous velocity of the bird
A cylindrical resistor of radius 3.1 mm and length 1.3 cm is made of material that has a resistivity of 5.9 x 10-5 Ω•m. What is the magnitude of the current density
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