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The accepted value of the specific gravity of a rectangular metalblock is 2.70. A student determines the dimensions to be: length =1.5 cm; width = 0.75 cm; thickness = 0.40 cm. Its mass is 1.25 g. What is the relative error of the determination?
A satellite with a mass of 310 kg moves in a circular orbit 7.00 107 m above the Earth's surface. What is the gravitational force on the satellite
A research balloon bound for the stratosphere is filled at sea level with 800 m3 of helium whose initial temperature is 285 K. What is the temperature of the helium
christian ramirez a small 0.12kg metal ball is tied to a very light sting 0.80m long to form a pendulum that is then
Two non conservative forces are present: friction does -2.00 104 J of work on the car, and a chain mechanism does +3.00 104 J of work to help the car up a long climb. What is the transform in the car's kinetic energy, ΔKE = KEf - KE0, from A to B.
A 10.0-kg mass is placed on a 25.0o degree incline and friction keeps it from sliding. What is the frictional force while the mass is sliding
A hoop and a disk, both of 0.70- m radius and 5.0- kg mass, are released from the top of an inclined plane 3.0 m high and 8.2 m long. What is the speed of the hoop
Two 0.80g spheres are charged equally and placed 2.0cm apart. When released, they begin to accelerate at 160m/s^2. What is the magnitude of the charge on each sphere?
A 6 m board of mass 5 kg is hinged at one end, with a 60 kg block nesting on the board 202 cm from the hinge. Find the force exerted by the hinge at this angle
What is the electric field vec E. What is force vec F on a -1.0 nC charge placed at the midpoint.
A constant force vector F =(8.0i+9.0j+12.0k)N acts on a small object of mass 95 g. What is the angle between F vector and d vector
A 0.140 kg baseball is thrown horizontally with a velocity of 28.9 m/s. It is struck with a constant horizontal force that lasts for 1.85 ms, What was the magnitude of the horizontal force
A parallel-plate capacitor has square plates that are 6.00cm on each side and 4.20mm apart. If the potential difference between the plates is 78.0V , how much electrical energy is stored in the capacitor
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