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Suppose that electrical attraction, rather than gravity, were responsible for holding the Moon in orbit around the Earth. If equal and opposite charges Q were placed on the Earth and the Moon, what should be the value of Q to maintain the present orbit? Use these data; mass of Earth = 5.98 X 1024 kg, mass of Moon = 7.35 X 1022 kg, radius of orbit = 3.84 X 108 m. Treat the Earth and Moon as point particles.
what is the dimension of gravitational force and what is the dimension of acceleration
A molecule of DNA (deoxyribonucleic acid) is 2.22 µm long. The ends of the molecule become singly ionized, Determine the effective spring constant of the molecule
A seasoned mini golfer is trying to make par on a tricky hole #5. The golfer can complete the hole by hitting the ball from the flat section it lays on, at what speed must the golfer hit the ball to land the ball in the hole
A copper block is suspended from a wire, as in part 1 of the drawing. A container of mercury is then raised up around the block, Find the ratio of the fundamental frequency of the wire in part 2 to the fundamental frequency in part 1
The robot HooRU is lost in space, floating around aimlessly, and radiates heat into the depths of the cosmos at the rate of 12.9 W. What is HooRU's temperature
A Na+ ion moves from inside a cell, where the electric potential is -68 mV, to outside the cell, Does its energy increase or decrease
Laser light at 635 falls on a double-slit apparatus with slit separation 6.9 .Find out the separation between the third and fourth bright fringes, as seen on a screen 1.4 from the slits.
light of wavelength 600nm is incedent normally on a surface of area 4 cm^2. Determine the power output of the light source
A nail with a diameter of 1.00 mm projects 25.0 mm horizontally outward from a wall. how much does the nail deflect downward
At a height of fifteen meters above the surface of a freshwater lake, a sound pulse is generated. How deep is the lake
A 6.0 ohm and 12.0 ohm resistor are connected in series to a 36V battery. what is the current through each resistor
a horizontal pipe narrows from a radius of .250 m to .100m if the speed of the water in the pipe is 1.00 m/s in the larger-radius pipe, what is the speed in the smaller pipe
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