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A spaceship is on a straight-line path between the Earth and the Moon. At what distance from (the centre of) Earth is the net gravitational pull on the probe from the Earth and the moon zero? MEarth = 6 X 1024 kg. MMOON = 7 X 1022 kg. The distance from the Earth to the moon is 380,000 km (measured from the centre of mass of each).
A ball of moist clay falls 19.8 m to the ground. It is in contact with the ground for 19.5 ms before stopping. What is the average acceleration of the clay during the time it is in contact with the ground
A runner of mass m = 37 kg and running at 2.8 m/s runs asshown and jumps on the rim of a playground merry-go-round which hasa moment of inertia of 383 kg·m2, what is its final angular velocity
Two small plastic spheres are given positive electrical charges. When they are a distance of 14.8cm apart, What is the charge on the second sphere
You have carefully prepared the wave function of an electron to be in the first energy eigenstate of an infinite potential well spanning a length a. Now you decide to release the electron from the prison by turning off the infinite potential barri..
A step-down transformer is used for recharging the batteries of portable electronic devices. Find the current on the secondary side
a solar energy power plant consists of a carnot engine with a cold reservoir maintained at 40 degree celcius using
A counter with negligible background gives exactly 10,000 counts in a 1-s period when a standard source is in place. What is the counter dead time
A 45.4 kg girl is standing on a 144 kg plank. The plank, at first at rest, is free to slide on a frozen lake, which is a flat, frictionless surface. The girl begins to walk along the plank at a constant velocity of 1.60 m/s relative to the plank. Wha..
The planet Neptune is 4.17×1012 from the Earth. Its diameter is 5.02×107 m. What diameter telescope objective would be necessary to just barely see Neptune as a disk rather
by what factor would the tension in a violin string have to change to tune it from baroque pitch of 415 hz to the
An acorn falls into a still pond and bobs in the water making a ripple in the pond. It takes 4.00 seconds for the acorn to complete 6.00 full cycles of vertical motion in the water. You too notice that the distance among wave peaks is 15.0 cm. Find t..
A rectangular loop of side lengths 3 cm and 5 cm, What is the speed of the loop if the induced current is 1.5 mA
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