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A clown at a birthday party has brought along a helium cylinder, with which he intends to fill balloons. When full, each balloon contains 0.00280 m3 of helium at an absolute pressure of 1.20 x 105 Pa. The cylinder contains helium at an absolute pressure of 2.90 x 107 Pa and has a volume of 0.00280 m3.
The temperature of the helium in the tank and in the balloons is the same and remains constant.
What is the maximum number of people who will get a balloon?
a parallel-plate capacitor has 5.0 cm x 5.0 cm electrodes with surface charge densities 1.0 x 10-6 cm2. a proton
A 0.50 kg block rests on the icy surface of a frozen pond, which you can assume to be frictionless. what is the minimum uncertainty in the block's speed
An 8.0 kg sled is initially at rest ona horizontal road. The coefficient of kinetic friction between thesled and the road is 0.40. Find the change in the kinetic energy of the sled
Three charged particles are placed at each of three corners of an equilateral triangle whose sides are of length 2.8 . Two of the particles have a negative charge: = -6.7 and = -13.4 . The remaining particle has a positive charge, = 8.0 . What is ..
A proton moves at a speed of 1210 m/sin a direction perpendicular to a magnetic field with a magnitude of 0.74 T. What is the magnitude of the magnetic force on the proton?
A bicycle wheel has a diameter of 66 centimeter. and a mass of 2.0 kilogram. Suppose the wheel has the characteristics of a hoop. find what force would be required on the chain to achieve an acceleration of 5.0 rad/s2
a proton is fired with an initial velocity of 1.5x106 ms into a uniform electric field. the proton was brought to a
A car rounds a level curve of radius 100 m at a constant speed of 30 m/s. What is the magnitude of the acceleration of the car
A 0.078 kilogram mass hangs from a vertical spring. You throw the mass downward. The mass has a velocity of 3.40 m/s. Find how much work was done on the mass by the spring
a truck driver transporting new cars needs to roll the cars off the truck. you offer to design a ramp to help with that
Water is streaming downward from a faucet opening by an area of 3.0 × 10−5 m2. It leaves the faucet by a speed of 5.0m/s. The cross-sectional area of the stream 0.50m below the faucet is:
A 45.0 kilogram girl is standing on a 159 kilogram plank. The plank, originally at rest, is free to slide on a frozen lake, which is a flat, frictionless surface. Find the velocity of the plank relative to the surface of ice
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