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1. Does observed gravitational lensing correspond to a converging or diverging lens? Explain briefly.
2. What are gravitational waves, and have they yet been observed either directly or indirectly?
3. Is the event horizon of a black hole the actual physical surface of the object?
Consider a circular loop of wire placed with its face parallel to the uniform magnetic field between the pole pieces of a large magnet. The loop carries 774 A of current and has a diameter of 9.3 cm. If the torque on the loop is 8.2 m*N, how stron..
When the tension in a cord is 77.4 N, the wave speed is 132 m/s. What is the linear mass density of the cord
A particle of rest energy mc^2 is moving with speed v in the positive x direction. The particle decays into two particles, each of rest energy 140 MeV. Find the rest energy of the original particle
an empty parallel plate capacitor is connected between the terminals of a 18.1-v battery and charges up. the capacitor
a block having mass m= 10kg rests on a horizontal surface. Us+.4 and Uk=.2. what is the friction force if an external horizontal force of 32N is exerted on the block
q1. a 4.00-kg model rocket is launched expelling 54.9 g of burned fuel from its exhaust at a speed of 690 ms. what is
A 270-N sphere 0.20 m in radius rolls without slipping 6.0 m down a ramp that is inclined at 40° with the horizontal. What is the angular speed of the sphere at the bottom of the slope
A battery labeled 12.0 V supplies 1.63 A to a 5.5 resistor, What is the terminal voltage of the battery
A point charge Q is located on the x axis at x = 2.0 meter. A second point charge, -Q, is placed at x = 3.0 meter. If Q = 40 mC, find what is the magnitude of the electrostatic force on a 30-mC charge located at the origin
A 283 g aluminum coffee pot is filled with 650 mL of water. If the power output of the coffee pot is 750W, how long will it take room temperature (20oC) water to boil (100oC)? Aluminum has a specific heat of 0.900 J/goC.
Assume a billiard ball is a solid sphere. Its radius is 3 cm and mass is 500 grams. The coefficient of static friction between the ball and the surface is .70. a) Where should you hit the ball so that it experiences pure rolling motion without the..
The potential negative consequences of the use of the concept of taking the use of stimulus generalization consumers more choices and ways to care for their teeth and oral hygiene to outweigh the benefits of the proposal?
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