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"For a system of two particles we often let the potential energy for the force among the particles approach zero as the separation of the particles approaches infinity. If this choice is made, describe why the potential energy at non-finite separation is positive if the particles repel one another and negative if they attract"
a large cylindrical tank contains 0.790m3 of nitrogen gas at 20.0?c and 7850pa absolute pressure. the tank has a
a father racing his son has half the kinetic energy of the son who has half the mass of the father.the father speeds up
An airplane, whose air speed is 380 km/hr, is supposed to fly in a straight line 23.0 degrees north of due east. A steady 100 km/hr is blowing from the north. Illustrate in what direction should the plane head realative to the earth?
A plucked guitar string produces a sound wave of frequency 440 Hz. (a) What is the wavelength of the sound wave (assume the speed of sound in air is 340 m/s)? (b) How much time elapses between the impacts of two adjacent compression on your eardru..
a certain mass m1 of ice initially at -5 c is placed into a perfectly isolated container along with a certain mass m2
A 4.00 L sample of a diatomic ideal gas with specific heat ratio 1.40, confined to a cylinder, is carried through a closed cycle. Find the temperature at the end of the cycle
A rock weighing 10kg is carried horizontally across a 10m room. Calculate What power is expended if you lift the rock to 120cm in time 10s
A 5.40 kg mass attached to a spring oscillates with a period of 0.445 s and an amplitude of 17.0 cm. Find the total mechanical energy of the system
in 1993 the radius of hurricane emily was about 350 kmh. the wind speed near the center eye of the hurricane whose
In Lab 2 you pushed a cart up an incline plane with friction. If the acceleration of the cart on the way up after you release it is 5.5 m/s2 and the acceleration of the cart on the way back down is 3.2 m/s2
A thin film of MgF2 (n=1.38) coats a piece of glass. Constructive interference is observed for the reflection of light with wavelengths of 500nm and 625nm.
An ice hockey puck is sliding along the vertical wall as shown on the picture (top view shown). Puck is moving in the horizontal plane only. Find the velocity of the puck at that point
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