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Helium is used to fill a balloon of diameter 31 cm at 23C and 1.5 atm. The mass of a helium atom is 4.0026 u, the conversion factor from u to kg is 1.66 × 10?27 kg/u, the conversion factor from atm to Pa is 1.013 × 105 Pa/atm, the universal gas constant 8.31451 J/Kmol, the Boltzmann's constant is 1.38066 × 10?23 J/K, and Avo- gadro's number is
a. How many Helium atoms are there in the balloon?
b. What is the average kinetic energy of each Helium atom?
c. What is the average speed (i.e., the root mean square speed) of each Helium atom?
A water pipe is inclined 32.0° below the horizontal. The radius of the pipe at the upper end is 3.00 cm. If the gauge pressure at a point at the upper end is 0.117 atm, what is the gauge pressure at a point 2.65 m downstream, where the pipe has narro..
questiona white billiard ball with mass mw 1.32 kg is moving directly to the right with a speed of v 2.92 ms and
A car travelling at 19 {rm m/s} runs out of gas while travelling up a 21^circ slope. How far would the car go up the hill before it runs out of gas.
A thin double-convex lens is intended to focus the image of an object onto a screen so that the image is life-sized on the screen. find the total distance between the object and the image
q1. what is the kinetic energy of an ideal projectile of mass 15.3 kg at an apex highest point of its trajectory if it
Suppose that a high-energy particle accelerator accelerates an electron to such great speed that its relativistic mass becomes as large as the rest mass of a proton. Calculate the speed of this electron
Every day our Earth receives 1.55×1022 J energy from the Sun. If we were able to use 0.85 percent of this energy to accelerate spaceships, then how various missions will be possible in one year.
A bat at flying east at 30 m/s sends out ultrasonic waves at 60kHz and receives them returned from an object moving east at 35.0 m/s, What is the sound frequency of the reflected wave as heard by bat
A painter (m=70 kg) is standing a distance of 0.6 m from the top of a ladder (mass 40 kg and length 2.5 m). Find the conditions for static equilibrium of the ladder with the painter on top
A heat pump has a coefficient of performance of 3.85 and operates with a power consumption of 6.88 x 103 W. How much energy does it deliver into a home during 2 h of continuous operation
A block hangs from the ceiling by a massless rope. A second block is attached to the first block and hangs below it on another piece of massless rope. Calculate the mass of the top block
An electron is at the origin. (a) Calculate the electric potential VA at point A, x = 0.160 cm. V (b) Calculate the electric potential VB at point B, x = 0.170 cm. V What is the potential difference VB - VA? V
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