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(a) What is the gravitational potential energy of an interstellar cloud, with a density of 1000 H2 molecules/cm3, and radius of 10 pc?
(b) What is it kinetic energy if its temperature is 30 K?
(c) Is this cloud likely to collapse and form stars? Why?
Calculate the magnitude of the gravitational force exerted on a 611-kg satellite that is a distance of two earth radii from the center of the earth, What is the magnitude of the earth's acceleration
A sailboat is traveling east at 5.0 m/s . A sudden gust of wind gives the boat an acceleration a = (0.80 m/s^2 , 40 degrees north of east). A)What is the boat's speed 4.5s later when the gust subsides? B)What is the boat's direction 4.5s later whe..
How to find out the force of friction
Over a time interval of 2.16 years, the velocity of a planet orbiting a distant star reverses direction, Find the total change in the planet's velocity in m/s
What is the distance between deer a and c
Two small objects are hung, from a point, on strings 50 cm long. they each have mass .06 grams and are given equal charges if the strings each make an angle of 37 degrees with a vertical, what is the magnitude of the electric force between the ob..
Assume after charging a 4.80 microF capacitor to 5 V you connect it to the second uncharged capacitor of 15 microF. What voltage will you voltmeter read across the second capacitor after repeating charge sharing process two times? State the answer..
the snow exerts a retarding force on the sled that points opposite to the direction of motion, and has a magnitude of 57 N. Find out the acceleration of the sled and child.
A 1650-kg car is traveling at 34 m/s. How fast must a 91 kg bicycle and rider be traveling to have the same kinetic energy as the car.
The specific heat of water is 4186 J/kg•K. The latent heat of fusion is 333 kJ/kg. The density of water is 1.0 g/cm.
A mountaineer uses a global positioning system receiver to measure his displacement from base camp to the top of Mount McKinley, what is the displacement in going from base camp to the top
What were the initial charges on the spheres? Since one is negative and you cannot tell which is positive or negative, there are two solutions. Take the absolute value of the charges and enter the smaller value here.
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