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Question: A spherical balloon with negligible elastic force is filled at room temperature (20 ?C with enough helium gas that it just floats in the surrounding air at standard atmospheric pressure. If the balloon is 2m in diameter,
a. What is the pressure of the gas in the balloon?
b. What is the mass of the gas it contains?
c. What is the density of the gas in the balloon?
d. What is the density of the air outside, taking it to be 20% O2 and the rest N2?
e. What is the mass of the balloon without the gas?
A uniform electric field with a magnitude of 6*10^6 N/C is applied to a cube of edge length 0.1 m. what is the electric flux passing through the shaded face of the cube
An engine delivers 40.0 J of work while it takes in energy from a 400 K thermal source. find the least amount of heat needed to run the engine
A solenoid has 137 turns of wire uniformly wrapped around anair-filled core, which has a diameter of 6 mm and a length of 8.5cm. The permeability of free space is 1.25664 × 10−6N/A^2 . Calculate the self-inductance of the solenoid.
A particle has shifted along some trajectory in the plane xy from point 1 whose radius vector r1 = i 2j to point 2 with the radius vector r 2 = 2i - 3j. During that time the particle experienced the action of certain forces, one of which being F =..
a copper strip 5.0 cm long 1.3 cm wide and 2.0 mm thick moving in the x-y plane. the strip is in a magnetic field given
For no apparent reason, a poodle is running at a constant speed of 4.40 {rm m/s} in a circle with radius 3.0 {rm m}. Let vec v_1 be the velocity vector at time t_1, and let vec v_2 be the velocity vector at time t_2.
Some bacteria are propelled by biological motors that spin hair-like flagella. What is the angular speed (the magnitude of the angular velocity) of this bacterial motor
Calculate the solar zenith angle at 9am local sun time at Seattle (47degrees N, 122 degrees W) at summer solstice and at winter solstice.
A 450 Newton rightward force is used to drag a large box across the floor with a constant velocity of 0.678 m/s. the coefficient of friction between the box snd thr floor is 0.795. Determine the mass of the box
A very thin film of oil (n=1.25) floats on water (n=1.33). Find the thinnest film that produces a strong reflection for green light with a wavelength of 500nm
question an object attached to a spring exhibits simple harmonic motion with an amplitude of 10.0cm. how far from
What is the tension in the string between the blocks - If the surface were frictional, and the coefficient of kinetic friction between each block and the surface is 0.111, what would be the new acceleration?
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