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The orbit of Halley's Comet around the Sun is a long thin ellipse. At its aphelion (point farthest from the Sun), the comet is 5.500 × 1012 m from the Sun and moves with a speed of 10.00 km/s. What is the comet's speed at its perihelion (closest approach to the Sun) where its distance from the Sun is 8.400 × 1010 m? The mass of the Sun is 1.987 × 1030 kg
A cross-country skier slides horizontally along the snow and comes to rest after sliding a distance of 28 m. determine her speed at the start of the slide
Start by extending the existing ray emitted from the tip of the object. Then create the reflected ray. Draw the vector for the reflected ray starting from the point where the incident focal ray hits the mirror. The location and orientation of the ..
ne kilowatt-hour (kWh) is the amount of work or energygenerated when one kilowatt of power is supplied for a timeof one hour. find the numbner of joules of energy in one kilowatt-hour
A gas is kept at constant pressure. If its temperature is changed from 15 to 145°C, by what factor does the volume change
1. if the total electric current reaching the earths surface is nearly constatnt at 1000 a approximately how much
how would the intensity of light vary with distance from the source according to the a wave theory b particle photon
A steel wire of length 2.07m with circular cross section must stretch no more than 0.300cm when a tensile (stretching) force of 430N is applied to each end of the wire. What minimum diameter d min is required for the wire
A block (mass = 2.4 kg) is hanging from a massless cord that is wrapped around a pulley, Find the angular acceleration of the pulley and the tension in the cord
A small object is released from rest and falls 1.00 x 10^ 2 feet near the surface of the earth. Neglect air resistance. How long will it take to fall through the 1.00 x 10^2 feet mentioned?
You are the ground-control commander of a 2000 kg scientific rocket that is approaching Mars at a speed of 25,000 km/h . It needs to quickly slow to 15,000 km/h to begin a controlled descent to the surface.
The rms speed of an oxygen molecule (O2) in a containerof oxygen gas is 700 m/s. What is the temperature of the gas
An object is placed 100 cm in front of a diverging lens of focal length -25 cm. What is the lateral magnification of this system of lenses
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