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A 20kg hollow plastic sphere with a diameter of 130cm is used as a float to support an iron block in the water. A wire connects the sphere to the block and the sphere Is half submerged
(a) What is the mass of the iron block?
(b) What is the tension in the wire?
Jill's camera can photograph objects sharply 24 cm away but not closer. Find the focal length of the Jill's lens
how to Compute the work done by this field on a charge.
Consider an LR circuit with a variable inductor and with deltaVs=150 V, f=60Hz, R=5 ohms. Calculate the power in the resistor
A 0.5 kg cart is pushed by a force of 6.2 N for a total distance of 3.2 m. what would the velocity of the cart be when the force stops
A 16.1-m length of hose is wound around a reel, which is initially at rest. The moment of inertia of the reel is 0.42 kg · m2, and its radius is 0.174 m. how long does it take to completely unwind the hose from the reel
A capacitor with C = 36.0 mF is placed in series with a 12.0-V battery and an inductor having L = 350 mH. What is the frequency of electromagnetic oscillations in the circuit
A coil of inductance 110 mH and unknown resistance and a 1.4 ?F capacitor are connected in series with an alternating emf of frequency 980 Hz. what is the resistance of the coil
A block of wood has a mass of 3.87 kg and a density of 584 kg/m3. It is to be loaded with lead so that it will float in water with 0.84 of its volume immersed. What mass of lead is needed if the lead is on top of the wood
As seen from the window of a space station, a 99.0 kg satellite sailing along at 9.4 m/s collides head-on with a small 286.0 kg asteroid, What is the final velocity of the satellite
A shell is fired from a gun with a muzzle velocity of 25 m/s, at an angle of 60° with the horizontal. How far from the gun does the other fragment land
A 3kg model rocket initially at rest experiences an average force of 3950N over a distance of 200 cm. How much has the rockets kinetic energy increased
A 15 V constant voltage battery is connected to 120 kÎ© resistor, How many electrons pass through the resistor
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