Question How does an electron maintain its orbit around the nucleus despite having less potential and more kinetic energy in its bound state? Solution Let… Read More »How does an electron maintain its orbit around

Question You are writing an adventure novel in which the hero escapes across the border with a billion dollars’ worth of gold in his suit-case.… Read More »You are writing an adventure novel in which the hero escapes across the border with a billion dollars’

Question A car accelerates from rest at a constant rate alpha (α) for some time after which it decelerates at a constant rate β to… Read More »a car accelerates from rest at a constant rate alpha

Question A bus accelerates from the rest for time t1 at a constant rate α then retards at a constant rate β for time t2… Read More »a bus accelerates from rest for time t1

Question A student stands at the edge of a cliff and throws a stone horizontally over the edge with a speed of 18.0 m/s. The… Read More »A student stands at the edge of a cliff and throws a stone horizontally

Question A student stands 20 m away from the foot of a tree and observes that the angle of elevation of the top of the… Read More »A student stands 20 m away from the foot

Question In fusion of hydrogen isotopes into helium the decrease in mass is about 0.65%. Calculate the energy obtainable when 1.0 gram of hydrogen is… Read More »In fusion of hydrogen isotopes into helium the decrease in mass is about 0.65%

Question In a thermonuclear reaction the total initial mass is 5.02 x 10-27 kg and the total final mass is 5.01 x 10-27 kg. What… Read More »In a thermonuclear reaction the total initial mass is 5.02 x 10^-27 kg

Question In a nuclear reaction the mass defect is 2.0 x 10-6 g. Calculate the energy released, given that the velocity of light is 3.0… Read More »In a nuclear reaction the mass defect is 2.0 x 10^-6g. calculate the energy released

Question calculate the wavelength of an electron of mass 9.1×10-31 kg moving with a velocity of 2.0×106 m/s. Plancks constant, h = 6.63 x 10-34Js.… Read More »calculate the wavelength of an electron of mass 9.1×10^-31 kg moving with a velocity of 2.0×10^6m/s

Question A waterfall is 420 m high, calculate the difference in temperature of the water between the top and bottom of the waterfall assuming no… Read More »A waterfall is 420 m high calculate the difference in temperature of the water between the top and bottom of the waterfall

Question How does air resistance affect the acceleration of a falling parachute? Read: Find the acceleration when the velocity is 0. Answer Air resistance, or… Read More »How does air resistance affect the acceleration of a falling parachute?