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A stone is dropped vertically from the top of a tower of height 40 m. At the same time a gun is aimed directly at the stone from the ground at a horizontal distance 30 m from the base of the tower and fired. If the bullet from the gun is to hit the stone before it reaches the ground, what is the minimum velocity of the bullet should be, approximately.
A puck of mass 0.1 kg slides in a circular path on a horizontal frictionless table at an angular velocity ? of 20 rad/s. What happens to the angular velocity of rotation
Two isotopes of a certain element have binding energies that differ by 4.7540 MeV. The isotope with the larger binding energy contains one more neutron than the other isotope. Find the difference in atomic mass between the two isotopes
blocks are lined up in a row on a frictionless table. How much force does the 8.0 block exert on the 7 block.
A gemstone is placed 20.0 centimeter in front of a concave mirror and is within the focal point. Determine what is the focal length of concave mirror
As astronauts travel between the Earth and the moon, their mass remains constant, but their weight diminishes. Assume the Earth and moon are in a fixed position relative to each other and the astronauts travel directly from the Earth to the moon.
A portable 3.5 kw wate heater is immersed for 3 minutes in a plastic filled with 20 kg of water at 20C. what will be the final temperature of the mixture given specific heat of water at 4186 j/gkC.
A light string is wrapped around a 0.160-kg hollow 0.080-m-radius hoop. The hoop is released from rest and the fee end of the string is held in place. What is tension in the string while the hoop falls
One cubic centimeter of a cumulus contains 420 water drops,which have a typical radius of 10 μm .(a) How many cubic meters of water are in acylindrical cumulus cloud of height 3.1 km and radius 0.9 km?
consider a model rocket that is lunched in a vertical direction. Nelected air resistance and changes in its mass , m. determine the mamimum alttiude
A string with a mass of 31 g and a length of 2 m is stretched under a tension of 67 N. How much power must be supplied to the string to generate a traveling wave that has a frequency of 51 Hz and an amplitude of 4 cm.
Two objects with masses of 3.70kg and 7.80kg are connected by a light string that passes over a frictionless pulley. Determine the acceleration of each object
q1. a car carrying a 75 kg test dummy crashes into a wall at 31 ms and is brought to rest in 0.10 s. find the average
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