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The biggest asteroid (Asteroid 2005 YU55 400 m wide) to cruise by the Earth in 35 years made its closest approach on Tuesday November 11/08/2011 at 6:28 p.m. (PST). According to NASA, at the point of closest approach, it was no closer than 324,600 km from the center of the earth. Let us assume that Asteroid 2005 YU55 has a mass of 10 billion kg. (a) Calculate the gravitational force of attraction between the asteroid and the earth the point of closest approach. (b) Assume that the asteroid goes into circular orbit at a distance of 324,600 km from the center of the earth. Find the acceleration and speed of the asteroid in its circular orbit.
A boxcar of mass 5.32 x 10^4 kg is rolling south at 3.49 m/s when it collides and couples with another boxcar that is rolling north at 5.12 m/s. Find the mass of the boxcar
A parallel-plate air capacitor with a capacitance of 236 has a charge of magnitude 0.13 on each plate. The plates have a separation of 0.33.What is the potential difference between the plates.
An object of mass 2.00 kg is held at a position A, a vertical height of 20.0 m above the ground. Point B is 8.00 m directly below A. Neglect air resistance and use g = 10.0 m/s.
Evaluate the electrostatic energy of two opposite charges
An air molecule is moving at a speed of 438m/s. How many meters would molecule move during 7ms (milliseconds) if it didn't collide with any other molecules.
What is the size of the gravitational force that the Earth exerts on the Moon.
A steel cable has a cross-sectional area 3.44 × 10-3 m2 and is kept under a tension of 3.33 × 104 N. At what speed does a transverse wave move along the cable
A tennis player standing 12.6 m from the net hits the ball at 2.79° above the horizontal. how fast was the ball moving when it left the racket
A shop sign weighing 245-N is supported by a uniform 155-N bean. Find out the tension in the guy wire, and the horizontal and vertical forces exerted by the hinge on the bean.
A rock is thrown vertically upward with a speed of 19.0m/s from the roof of a building that is 70.0m above the ground. What is the speed of the rock just before it strikes the ground
Two particles are fixed on an x axis. Particle 1 of charge 51.50 μC is located at x = -33.2 cm; particle 2 of charge Q is located at x = 10.10 cm. Particle 3 of charge magnitude 37.7 μC is released from rest on the y axis at y = 11.30 cm.
What is the buoyant force acting on a cube of copper that measures 4.49 cm on its each side if it is immersed in water. The density of copper is 8933kg/m3
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