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a) When placed in a water of density 997 kg/m3, a hollow sphere of inner radius 10cm and outer radius 11cm floats with half of its volume below the level of the free surface of the water. Compute the density of the material the sphere is made.
b) When placed in oil this sphere floats 60% of its volume below the level of the free surface of the oil. Compute the density of the oil.
A potential difference is applied between the electrodes in a gas discharge tube. What is the current in the tube
A 2.00 kg block is held in equilibrium on an incline of angleθ =60° by ahorizontal force vector F applied in the direction shown in the figure below. If the coefficient of static friction between block and incline isµs = 0.300, determine the followin..
A 70.0 kg football player leaps straight up into the air (with no horizontal velocity) to catch a pass. If the ball was moving horizontally when it was caught, how fast was the ball travelling
Once a traffic light turns green, a car speeds up from rest to 50 mi/h with constant acceleration 9 mi/h • s. In the adjoining bike lane, a cyclist speeds up from rest to 20mi/h with constant acceleration 13mi/h.
A 1.0 object is released from rest 500km above the earth. By what percentage is the flat-earth calculation in error
question1a professors office door is 0.92 wide 2.0high and 4.0 thick has a mass of 25 and pivots on frictionless
A box of mass 3 kg sits on a table. Neglect friction. You pull on a string tied to the right side of the box, exerting a force of 20.0 N at an angle of 30.0 degrees above the horizontal. Calculate the coefficient of friction with the surface
A 33.0cm focal length converging lens is 17.2cm behind a diverging lens. Parallel light strikes the diverging lens. What is the focal length of the diverging lens
An electromagnetic wave of wavelength 405 is traveling in vacuum in the direction. The electric field has amplitude 2.20×10?3, What is the frequency of this wave
When 5.30* 10^5 J of heat is added to a gas enclosed cylinder fitted with a light frictionless piston maintained at atmospheric pressure, estimate the work done by the gas
A car rounds a curve that is banked inward. The radius of curvature of the road is R = 116, the banking angle is ? = 29°, and the coefficient of static friction is ?s = 0.27. Find the minimum speed that the car can have without slipping.
How to calculate the efficient canyon albedo
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