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A man of mass 73.9 kg and density 970 kg/m3 stands in a shallow pool with 33.5 % of the volume of his body below water. Calculate the normal force the bottom of the pool exerts on his feet.
A car moving at a constant speed of 7.5 m/s, moves 25 m at a 20 degree angle above horizontal. How much time does it take the car to accomplish this movement
The "size" of the nucleus in Rutherford's model of the atom is about 1.00 fm = 1.00E-15 m. Determine (in MeV) the electrostatic potential energy of the pair of protons
An indestructible bullet 1.85 cm long is fired straight through a board that is 11.10 cm thick. The bullet strikes board with a speed of 455m/s and emerges with a speed of 279m/s. (To simplify, suppose that the bullet accelerates only while the fr..
A square conducting loop has side a and carries clockwise current I as shown in the diagram. calculate the magnitude and direction of the magnetic field at the center of the square
A 518- physics student stands on a bathroom scale in an 846- (including the student) elevator that is supported by a cable. As the elevator starts moving, the scale reads 464. Find the magnitude of the acceleration of the elevator
A hot-air balloon is ascending at the rate of 14 m/s and is 98 m above the ground when a package is dropped over the side. How long does the package take to reach the ground
Calculate the speed of an 8.5 × 104 kg airliner with a kinetic energy of 1.2 × 109 J
A car and driver have a combined mass of 100 kg. What is the force of the hill on the car as it passes over the top
Two infinitely large plates are arranged so that they are parrallel, and seperated by a distance d. What is the approximate electric field outside the plates
A uniformly charged conducting sphere of 1.4 m diameter has a surface charge density of 11 µC/m2, Find the net charge in coulombs on the sphere
A mass system with a spring constant of 66.0 N/m undergoes simple harmonic motion with a period of 0.628 s. what is the total energy of the oscillation
Calculate the absorbed dose in Gy to the skin of a person which receives 1500 ergs/gm of beta radiation from a cloud of radioactive krypton-85 gas.
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