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Question1
1) The molecular mass of helium is 4 g/mol, Boltzmann’s constant is 1.38066 × 10−23 J/K, universal gas constant is 8.31451 J/K mol, and Avogadro’s number is 6.02214 × 1023 1/mol. Given: 1 atm = 101300 Pa. How many atoms of helium gas are necessary to fill a balloon to diameter 25 cm at 59?C and 0.934 atm? 2) What is average kinetic energy of each helium atom? Answer in units of J 3) what is rms speed of each helium atom? Answer in units of m/s
Question2
A rod of length 30.0cm has linear density given by =50.0+20.0x,where x is distance from one end, measured in meters and linear density is in grams/meter.
a) What is the mass of the rod?
b) How far from the x=0 end is its center of mass?
Two cars travel in the same direction along a straight highway, How far must the faster car travel before it has a 15-min lead on the slower car
A cosmic-ray proton in interstellar space has an energy of 21.5 MeV, What is the magnetic field in that region of space
An astronaut leaves Earth in a spaceship at a speed of 0.960c relative to an observer on Earth. how long does the trip take
A platform is rotating with an angular speed of 3.00 rad/s and an angular acceleration of 11.0 rad/s2. what is the magnitude of the total acceleration a
A 2000w air conditioner and 700w refrigerator each operate on 120V rms. find current through air conditioner
Estimate the area of the plates needed to achieve a capacitance of 1 F, given the same air gap, What is the electric field between the plates
If a projectile is launched vertically from the Earth with a speed equal to the escape speed, how far from the Earth's center is it
A rock of mass 0.340 kg is spun horizontally at the end of a wire that is 1.00 m long and has a diameter of 1.00 mm. what is the Young's modulus of the wire
Spark plugs should be tightened to a specified torque of 13.64Nm. What force must you exert on the wrench
If the angular magnification of an astronomical telescope is 38 and the diameter of the objective is 66 mm, what is the minimum diameter of the eyepiece
three masses are located as follows: a 3.0 kg mass is at the origin, a 4.5 mass at (0.0m, 4.0m), what is the gravitational energy of the system of masses
Three deer, A, B, and C, are grazing in a field. Deer B is located 63.9 m from deer A at an angle of 51.4 ° north of west. What is the distance between deer A and C
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