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A chair of mass 11.5kg is sitting on the horizontal floor; the floor is not frictionless. You push on the chair with a force F = 38.0N that is directed at an angle of 40.0^\circ below the horizontal and the chair slides along the floor. use Newton's laws to calculate the normal force that the floor exerts on the chair.
Quadrupole moments in the shell model
an outfielder throws a 0.145kg baseball to the shortstop with a speed of 30m/s at an angle of 20 degrees above the horizontal. How far does the ball travel
"Rocket Man" has a propulsion unit strapped to his back. He starts from rest on the ground, fires the unit, and accelerates straight upward. Find the work done by the force generated by the propulsion unit
A lens that has a focal length of 8.45 cm is used as a magnifying glass. (Take the near point of a normal eye to be 25 cm from the eye.) What is the angular magnification
two forces F1 and F2 act a body of mass m on.If m=5.0 kg,F1=3.0 N and F2=4.0 N find the vector of acceleration of the body
An ideal gas initially at 280 K undergoes an isobaric expansion at 2.50 kPa. The volume increases from 1.00 m3 to 3.00 m3 and 11.4 kJ is transferred to the gas by heat. What is the change in internal energy of the gas?
A simple test to determine the capabilities of a person's lungs is to have the person blow with full force into one end of a manometer. What is the pressure in the person's lungs
The intensity of an earthquake wave passing through the Earth is measured to be 2.5×10^6J/m^2*s at a distance of 51km from the source. What was its intensity when it passed a point only 1.5km from the source? At what rate did energy pass through an a..
A 0.25-kilogram mass on a vertical spring oscillates at a frequency of 2.0 Hz. If a 0.60-kilogram mass were instead suspended from the same spring, what would be the frequency of oscillation
A chamber with a fixed volume of 1.0 m3 contains a monatomic gas at 3.00 102 K. The chamber is heated to a temperature of 5.00 102 K. How many gas molecules are in the chamber
A 80-g ball collides elastically with a 320-g ball that is at rest. If the 80-g ball was traveling in the positive x-direction at 5.75 m/s before the collision
Two round concentric metal wires lie on a tabletop, one inside the other. The inner wire has a diameter of 18.0cm and carries a clockwise current of 14.0 A, as viewed from above, and the outer wire has a diameter of 38.0cm .
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