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According to present theories of light, in some experiments light seems to be: 1)composed of particles which can neither be created nor destroyed. 2)a particle whose quantized energy depends on its velocity. 3)a wave that moves from one place to another if there is material to vibrate. 4)deflected due to repulsion from very massive objects. 5)none of the above.
Communications satellites are placed in a circular orbit where they stay directly over a fixed point on the equator as the earth rotates. What is the period of a satellite in a geosynchronous orbit
An electron is projected vertically upward with a speed of 1.50 * 10^6 m/s into a uniform magnetic field of 0.200 T, What is the radius of motion
A 603.7-W space heater is designed for operation in Germany, where household electrical outlets supply 230 V (rms) service. What is the power output of the heater
A high-tension power line composed of aluminum wire with cross-section area 24 x10?6 m2 carries a current of 1100 A. What is the power loss over 50 km of wire
What is the equilibrium temperature of this system? The average specific heat of aluminum over this temperature range is 653 J/(kg*K), determine the amount of water that has frozen
What is the thinnest film of MgF2 n=1.39 on glass that produces a strong reflection for orange light with a wavelength of 600 nm.
A 41 kg ice skater is moving at 4.73 m/s when she grabs the loose end of a rope, the opposite end of which is tied to a pole. Find the force exerted by the rope on her arms
You have a lens whose focal length is 12.7 cm. You place an object on the axis of the lens at a distance of 6.25 cm from it. How far is the object\'s image from the lens
The Achilles tendon inserts on the calcaneus at a distance of 8cm from the axis of the ankle joint. The force generated by the muscles attached to the Achilles tendon is 3000N, and the moment arm of this force is 5cm. a) Draw a free body diagram o..
A bas traveling at 25.0 m/s applies the brakes and decelerates uniformly at a rate of 1.2 m/s ? What is its velocity at the end of this time interval
He slides so that his speed is zero just as he reaches the base. Explain how much mechanical energy is lost due to friction acting on the runner? How far does he slide?
An electron in an oscilloscope is accelerated as a result of the potential difference between the cathode and anode. determine the voltage drop from cathode to anode
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