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Neutron stars consist only of neutrons and have unbelievably high densities. A typical mass and radius for a neutron star might be 2.89E+28 kg and 1.04E+3 m. Calculate the density of such a star.
A golf ball is struck off a tee (negligible height and air resistance) with initial velocity of 50 meters per second at an angle of 30 degrees above the horizontal. Illustrate what will be the vertical component of velocity after 2.5 seconds?
A source delivers an AC voltage of the form ?v = 92.2 sin (60?t), Find the rms voltage of the source
A place kicker should kick a football from a point 32 m (about 35.0 yd) from the goal, and the ball should clear the crossbar, which is 3.050 m high. When kicked, the ball leaves the ground with a speed of 21.0 m/s at an angle of 49° to the horizo..
A person scffing her feet on a wool rug on a dry day accumulates a net charge of -95uC. How many excess elecvtrons does she get
A thin metal foil separates one end of two pieces of optically flat glass (n = 1.5), the gap between the plates is filled with water (n = 1.33), What is the thickness of the foil
A spaceship is visiting Planet X. While descending to the surface, its rockets produce 25 kN of upward thrust and the spaceship's speed decreases at a rate of 0.15 m/s2. What is the mass of the spaceship
Calculate the angular wave number and the speed of the wave.
the forces exerted on the shoes and back of the 72-kg climber bythe walls of the chimney are perpendicular to the walls exertingthem. what is the magnitudeof the force exerted on his back
A camera with a telephoto lens of focal length 125 nm is used to take a photograph of a plant 1.8 m tall. The plant is 5.0 m from the lens. How tall is the image
A farmer throws a sack of wheat vertically downward with an initial speed of 12 m/s from the roof of a mill, 30.0 m above the ground. What is the speed of the sack at impact
If you place the box on a dolly of mass 4.7 and with coefficient of rolling friction 2.0×10−2, illustrate what horizontal acceleration would that 154 force provide?
The ball rebounds straight upward to a height of 0.700 m. Illustrate what are the magnitude and direction of the impulse of the net force applied to the ball during the collision with the floor?
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