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A 1.0 kg ball is thrown horizontally with a velocity of 15 m/s against the wall. If the ball rebounds horizontally by a velocity of 13m/s and the contact time is .020 s, what is the force exerted on the ball on the wall?
an electric field of intensity 3.7 knc is applied along the x-axis. calculate the electric flux through a rectangular
a converging lens f 13.0 cm is held 7.10 cm in front of a newspaper the print size of which has a height of 1.80 mm.
A box rests on top of a flat bed truck. The box has a mass of m = 16.0 kg. The coefficient of static friction between the box and truck is ?s = 0.81 and the coefficient of kinetic friction between the box and truck is ?k = 0.63. * The truck accele..
two einstein solids are brought together so that they can exchange energy. solid a has 78 oscillators and solid b has
There is strong evidence that the center of the Milky Way galaxy contains a giant black hole with a mass of perhaps one million Suns. find the maximum radius of a million-solar-mass black hole
An open railroad car of mass 2404 kg is coasting with an initial speed of 18 m/s on a frictionless, horizontal track. It is raining, and water begins to accumulate in the car. After some time, it is found that the speed of the car is only 10 m/s. How..
A 3 kg box rests on a horizontal surface. An external force 40 N is applied to the box, 30 degrees inclined from top. the box starts its motion from the rest. Find the final speed of the box after it moves 5 meters to the right
dry air had a co2 mole fraction of 0.00038 in 2007 compared with 0.00032 in 1965. calculate the total mass of co2 that
The figure below shows a resistor of resistance R =6.33 Ω connected to an ideal battery of emf = 14.0 V by means of two copper wires. Each wire has length23.3 cm and radius 4.10 mm. In dealing with such circuits in thischapter, we generally neglec..
question1the mean distance from the center of earth to the center of the moon is rem 3.84 times 108 m. the mass of the
A concave mirror and a plane mirror (f = 6.70 cm) are facing each other and are separated by a distance of 20.0 cm. An object is placed 11.0 cm in front of the plane mirror. Consider the light from the object that reflects first from the plane mirror..
The woman walks West for 15 minutes and travels a distance of 0.6 km, she then turns North and walks 0.4 km in 15 minutes. What is the womans average velocity
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