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The nucleus contains protons and neutrons. Being positively charged, the protons repel each other. The nucleus should fly apart due to the repulsive force. Yet, the nuclei of most atoms are stable explain.
A rocket is accelerated to speed 45300 m/s near Earth'ssurface (where Earth's radius is Re= 6370 km.), and it then coasts upward. Find the ratio of its speedto the escape speed on Earth
Jonathan and Jane are sitting in a sleigh that is at rest on frictionless ice. Jonathan's weight is 850N, Jane's weight is 550N , Calculate the magnitude of the sleigh's horizontal velocity after they jump out
An aquarium contains a 5-cm layer of water n=1.333 floating on top of carbon tetrachloride. what is the angle of refraction into the air
A gas flows through a pipe of diameter 10 cm with a velocity of 10 m/s with a mass flow rate of 16.63 kg/min. Determine the specific volume of the gas
Consider a rectangular swimming pool of depth 1 m with a width and length of 16 m. What is the total force on the bottom of the pool due to the water pressure
An airplane pilot fell 355 m after jumping from an aircraft without his parachute opening. He landed in a snowbank, creating a crater 1.3 m deep, estimate the work done on him by air resistance as he fell
A person wants to push a lamp ( mass 7.2 ) across the floor, for which the coefficient of friction is 0.20. calculate the maximum height x above the floor at which the person can push the lamp so that it slides rather than tips.
a copper wire is 5.00 m long and has a cross-sectional area of 2.00 10-4 m2. this wire forms a one turn loop in the
A point source of light is submerged 2.5 m below the surface of a lake and emits rays in all directions. What is the maximum radius that this circle could have
two point charges are placed along a horizontal axis with the following values and positions 3.0 microc at x 0 cm and
A piece of sandston with a bulk volume of 1.3 cc is contained ina 5-cc cell filled with helium at 760 mm Hg. Temperature ismaintained constant and the cell is opened to another evacuatedcell the same volume.
A ball is thrown straight up from an initial position yi = 1.00 m above ground level with an initial velocity v0. Calculate the height of the ball above the ground when it is at its highest point
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