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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 hydrogen atom has a radius of about 0.05 nm. estimate the electron's kinetic energy in three dimensions.
Water moves through a constricted pipe in steady, ideal flow. At the lower point the pressure is 1.65 105 Pa and the pipe radius is 2.60 cm. Find the volume flow rate through the pipe
Calculate both absolute and relative pressure on the bottom of the tank if the meniscus (mercury surface) of the leg opening in the open air is a / 100 mm above the other b / 100 mm below the other.
q1. on a cool morning while the temperature is 13.0 c you measure the pressure in your car tires to be 20.0. after
You drive 110 km/h east for 35 min, then 83 km/h north for 46 min. Find your average velocity for the entire trip
A piece of string 5.30 m long has a mass of 14 g. What must the tension in the string be to make the wavelength of a 128 Hz wave 120 cm.
a 16.0 g bullet is shot into a wooden block at rest with mass 4550 h on a frictionless surface. the block moves 1.20 m/s after the bullet strikes and becomes lodged in the block, find the speed of the bullet before striking the block
Most of us know intuitively that in a head-on collision between a large dump truck and a subcompact car, you are better off being in the truck than in the car. what force does the seat belt exert on each driver
A transformer with 120. turns in its secondary supplies 12. volts at 220. ma to a toy train. The primary is connected across a 120. V wall outlet. What power is delivered by the wall outlet
Two capacitors, C1 = 4.00 µF and C2 = 13.0 µF, are connected in parallel, and the resulting combination is connected to a 9.00-V battery. Find the equivalent capacitance of the combination
The value of F B. ds along closed path in a magnetic field is given by 6.28 X 10 T.m. What is the total current that passes througn this closed path?
A 12uF capacitor a 10Kohms resistor a 20.0 volt battery and a switch are all connected in a series , find the voltage on the capacitor after three time constants
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