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Which of Pluto's moons is farthest from the planet? How big is Dysnomia compared to its parent plant? Where can one find the most asteroids? When is a meteoroid termed a meteor? When is it termed a meteorite?
A transverse wave is traveling with a speed of 300 m/s on a horizontal string. If the tension in the string is increased by a factor of 5, calculate what is the speed of the wave
Earthquakes are basically sound waves (seismic waves) traveling through the earth. Because the earth is solid, it can support both “P waves” (longitudinal) and “S waves” (transverse). The P waves travel at 8000m/s, while S waves are slower, only 4500..
A uniform disk of radius 0.9 m and mass 3.2 kg is rotating about its center of mass. Its moment of inertia about its center of mass is I=1/2mR2. Find the magnitude of the net torque about the center of mass acting on the disk at t= 7 seconds
A record was set for stair climbing when a man ran up the 2100 steps of the Empire State Building in 11 minutes and 40 seconds. What was his average power output during the climb
A circular coil of wire of 200 turns and diameter 3 cm carries a current of 3 A. What is the torque on the coil
Nonreflective coatings on camera lenses reduce the loss of light at the surfaces of multilens systems and prevent internal reflections that might mar the image. Find the minimum thickness of a layer of magnesium fluoride
a uniform 30 kg ladder length 8.50 m leans against a smooth vertical wall. the base of the ladder is 12 ft from the
A 2.0 kg block slides on a frictionless 25o inclined plane. What are the magnitude and direction of the block's acceleration
A diver shines a flashlight upward from beneath the water ata 38.0^\circ angle to the vertical. At what angle does the light leave the water?
What if, instead, you threw the flashlight away from you to change your momentum toward the spacecraft. If the flashlight had a mass of 2.00-kg and traveled at a speed of 10.0 m/s, how long would it take you to get back
Two point charges 3.0cm apart have an electric potential energy -130?J, find the lesser and greater charge
A typical photovoltaic cell delivers 4.2×10-3 W of electric energy when illuminated with 0.12 W of light energy. What is the efficiency of the cell? An "energy bar" contains 27 g of carbohydrates. If the energy bar was his only fuel, how far could..
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