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A comet moves about the Sun in an elliptical orbit, with its closest approach to the Sun being about 0.570 AU and its greatest distance from the sun being 41.5 AU (1 AU = the Earth-Sun distance). The angular momentum of the comet about the Sun is constant, and the gravitational force exerted by the Sun has zero moment arm. The comet's speed at closest approach is 54.0 km/s. What is its speed when it is farthest from the Sun?
km/s
A Carnot engine is operated between a hot and a cold reservoir. find the temperature of the cold reservoir
A 74.9-kg skier rides a 3180-m-long lift to the top of a mountain. The lift makes an angle of 17.0 ° with the horizontal
An object moves with constant acceleration 5.00 m/s2 and over a time interval reaches a final velocity of 11.2 m/s. (a) If its initial velocity is 5.6 m/s, what is its displacement during the time interval?
The radius of a black hole is the distance from the black hole's center at which the escape speed is the speed of light. What is the radius of a black hole with the same mass as that of the Earth
A hollow, conducting sphere with an outer radius of 0.258m and an inner radius of 0.210m has a uniform surface charge density of +6.68×10?6C/m^2. What is the electric flux through a spherical surface just inside the inner surface of the sphere
A toaster oven has a equivalent resistance of 10.5 ?. When pluged in a 120 V circuit, (Assume direct current) , What's the power of the oven
A loudspeaker of mass 24.0 {rm kg} is suspended a distance of h = 1.40 {rm m} below the ceiling by two cables that make equal angles with the ceiling. Each cable has a length of l = 3.70 {rm m}.
A woman throws a ball at a vertical wall d = 3.6 m away. The ball is h = 1.8 m above ground when it leaves the woman's hand with an initial velocity of 10 m/s at 45°. How long was the ball in the air after it left the wall
A uniform electric field of magnitude 271 V/m is directed in the negative x direction. A +12.7 ?C charge moves from the origin to the point (x, y) = (15.5cm, 46.0 cm). What was the change in the potential energy of this charge?
Two cars collide at an intersection. Car , with a mass of 1900 kg , is going from west to east, while car B , of mass 1300 kg , is going from north to south at 16.0 m/s. How fast were the enmeshed cars moving just after the collision
Certain fish, such as the Nile fish (Gnathonemus), concentrate charges in their head and tail, thereby producing an electric field in the water around them. find the strength of the magnetic field at the receptor cells
How does the diameter of the lens affect magnification? How does the diameter of the lens affect the focal length?
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