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A Ping-Pong ball with mass 6 g is attached by a thread to the bottom of a beaker. When the beaker is filled with water so that the ball is totally submerged, the tension in the thread is 0.031 N . Determine the diameter of the ball. The density of water is 1000 kg/m^3 and the acceleration of gravity is 9.81 m/s^2 Answer in units of cm
A 3.25-kg object is moving in a plane, with its x and y coordinates given by x = 2t2 ? 4 and y = 4t3 + 4, Find the magnitude of the net force acting on this object
At a grinding wheel has an angular velocity of 27.0 rad/s . It has a constant angular acceleration of 25.0 rad/s^2 until a circuit breaker trips at time t = 1.70 s. What was the acceleration as it slowed down
One has a capacitance of 2.0 µF and the other a capacitance of 4.0 µF. These two capacitors together store 4.50 10-5 C of charge. What is the voltage of the battery
A nozzle of inner radius 1.05 mm is connected to a hose of inner radius 7.95 mm. The nozzle shoots out water moving at 25.5 m/s. At what speed is the water in the hose moving
A model of a red blood cell portrays the cell as a spherical capacitor, a positively charged liquid sphere of surface area A separated from the surrounding negatively charged fluid by a membrane of thickness t. Calculate the charge on the surface o..
a 330 kg piano is pushed 3.6 m up a 28 degree incline by three men starting at rest at the bottom of the hill and ending at 41 cm/s. What is the net work done on the piano
Calculate the force of gravity on a spacecraft 32000 km (5 earth radii) above the Earth's surface if its mass is 1800 kg. N (toward the earth)
A goose flying toward you at 13.8m/s emits a squawk, which you hear at 265Hz. Find the wavelength of the sound you hear
A rectangular loop with sides of lengtha=1.10cm andb=4.10cm is placed near a wire that carries a currenti(t)=3.14 + 1.04t2, where the current is in amperes and time is in seconds. The distance from the straight wire to the closest side of the loop..
As you zip through space in your PPS (personal propulsion suit), your pulse rate, as you count it, is 115 bpm, How fast are you moving with respect to the Moon
A freezer has a coefficient of performance of 6.30. The freezer is advertised as using 430 kW-h/y, On average, how much energy does the freezer use in a single day
A particle starts from the origin with velocity 5 m/s at t = 0 and moves in the xy plane with a varying acceleration given by = (8t), Determine the velocity of the particle as a function of time
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