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Use the Hubble law, the apparent visual magnitude of +12.9 and the observed redshift z = 0.158 to estimate the absolute magnitude of the quasar 3C 273 (which is the brightest quasar known). Compare the luminosity of 3C 273 with that of the Andromeda Galaxy (M31), the Sun, and the giant elliptical galaxy M87. Are your results consistent with the statement in this chapter that a luminous quasar has typically 1000 times greater luminosity than a large normal galaxy?
If the mass of both weights is 150 gm, the first mass is located 30 north of east, the second mass is located 30 south of east, and the transducer sensitivity is 0.5 volts/Newton, how large a voltage do you expect to measure? Suppose the transducer h..
A 25kg solid door is 220cm tall, 91cm wide. What is the door's moment of inertia for rotation about a vertical axis inside the door, 15cm from one edge.
A series of RLC circuit has R=200 ohms, L=40.0mH and C=120pF. What is the impedance of this circuit at resonance
A child operating a radio-controlled model car on a dock accidentally steers it off the edge. What is the car's speed at the instant it drives off the edge of the dock
A mass of 400 grams hangs from the rim of a wheel of radius 15cm. When released from rest, the mass falls 2 m in 6.5 sec. Find the moment of inertia of the wheel
Runner A is initially 4.0mi west of a flagpole and is running with a constant velocity of 2.0 mi/h due east. How far are the runners from the pole when they meet
A 1200 turn coil in a dc motor has an area per turn of 2.2 * 10-2m-2. What is the current in the coil
A 10.0 g object moving to the right at 15.0 cm/s makes an elastic head-on collision with a 15.0 g object moving in the opposite direction at 28.0 cm/s. Find the velocity of each object after the collision
She wants glasses that will let her see objects at a distance of only 25 cm from her eyes. Examine the focal length of the glasses needed if the glasses are 2 cm and 3 cm from her eyes.
A vertical spring (spring constant =120 N/m) is mounted on the floor. Determine the amplitude at which the block will lose contact with the spring
If the ball is free from rest at a height of 0.67 above the bottom of the track on the no-slip side, what is its angular speed when it is on the frictionless side of the track? Suppose the ball is a solid sphere of radius 2.2 and mass 0.14.
Calculate the energy in of a photon of radiation. A projectile is fired straight upward at 141 m/s. How fast is it moving at the the top of its trajectory? assume it is launched upward at 45 degrees about the horizontal plane. How fast is it moving..
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