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A falling stone takes ?t = 0.26s to travel past a window2.2 m tall
From what height above the top of the window did the stone fall?
A white billiard ball with mass mw = 1.34 kg is moving directly to the right with a speed of v = 3.02 m/s, What is the final speed of the white ball
A sample of isotope of 131 Iodine (half-life of 8.04 days) has activity of 5.8 mCi at the time of shipment. How much time has elapsed between the two measurements
One can not align the apparatus to eliminate entirely the effects of the Earth's magnetic field. calculate the component of the earth magnetic field perpendicular to the entering electron beam
At the instant the current in the inductor is maximal, how much charge is on the capacitor plates, Find the maximum current in the inductor
What is the highest value of the magnetic force.
The armature windings of a dc motor have a resistance of7.5? . The motor is connected to a 120-V line, What will be the current in the motor
A lamp (R = 146 omegacap.gif), an electric heater (R = 25 omegacap.gif), and a fan (R = 51 omegacap.gif) are connected in parallel across a 115 V line. What power is expended in the heater
High-speed stroboscopic photographs show that the head of a 190-g golf club is traveling at 58 m/s just before it strikes a 46-g golf ball at rest on a tee, Find the speed of the golf ball just after impact
A 155 g copper bowl contains 245 g of water, both at 20°C. A very hot 300 g copper cylinder is dropped into the water, causing the water to boil, with 5 g being converted to steam. The final temperature of the system is 100°C. Neglect energy trans..
A ball of mass m=0.5 kg and radius r=0.02m is pushed against a spring of force constant 200N/m, What is the speed of the rolling ball when it leaves the spring
What is the ph of a buffer that results when .40 mol nahco2 is mixed with 100 ml of 2.0 m hcl and diluted with water to 250 ml
lens forms an image of an object. The object is 16.0 cm from the lens, What is the focal length of the lens? Is the lens converging or diverging
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