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Consider a balloon containing hydrogenmolecules at room temperature (20°C) and atmospheric pressure.If the balloon has a spherical shape with radius of 13 cm, what is the number of molecules in the balloon?
A 4.20 kg sphere makes a perfectly inelastic collision with a second sphere that is initially at rest, What is the mass of the second sphere
For the real or imaginary nucleus of 83X^193, find the net electrical charge of the nucleus and the number of nucleons
the magnitude of the net electric field. A lead ball is dropped into a lake from a diving board 6.40 above the water. After entering the water, it sinks to the bottom with a constant velocity equal to the velocity with which it hit the water.
consider two point particles that have charge e are at rest and are separated by 3.70 x 10-15 m.a how much work was
The battery for certain cell phone is rated at 3.70V. According to the manufacturer it can produce 3.15 X 10^4 J of electrical energy, find the average current that this cell phone draws when turned on
A lightweight electric car is powered by ten 12-V batteries. At a speed of 70 km/h, the average frictional force is 1050 N. What must be the power of the electric motor if the car is to travel at a speed of 70 km/h
The vertical displacement y(x,t) of a string stretched along the horizontal x-axis is given by y(x,t) = (6.00 mm) cos[(3.25 m-1)x - (7.22 rad/s)t]. What is the distance between adjacent crests of the wave
q1. a major-league pitcher can throw a baseball in excess of 41.3 ms. if a ball is thrown horizontally at this speed
A monatomic ideal gas is held in a thermally insulated container with a volume of 0.06m^3. What volume must the gas be compressed to increase the pressure to 140 kPa
A coin is located 29.6 cm to the left of a converging lens (f = 21.6 cm). A second, identical lens is placed to the right of the first lens, Find the separation between the lenses
A bowling ball has a mass of 6.2 kg and a radius of 18 cm. If it is rolling down a lane with a speed of 8.6 m/s, what is the angular momentum of the ball
An 8.17-?F capacitor is fully charged by a 325.-V battery, which is then disconnected. How much energy ends up being stored in the second capacitor
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