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Mechanics | Relativity
An ideal gas at 10.3 °C and a pressure of 2.48 x 10^5 Pa occupies a volume of 3.12 m3. (a) How many moles of gas are present? (b) If the volume is raised to 5.45 m3 and the temperature raised to 25.6 °C, what will be the pressure of the gas?
Mechanics | Relativity
A clown at a birthday party has brought along a helium cylinder, with which he intends to fill balloons. When full, each balloon contains 0.00210 m3 of helium at an absolute pressure of 1.20 x 10^5 Pa. The cylinder contains helium at an absolute pressure of 2.30 x 10^7 Pa and has a volume of 0.00360 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?
Mechanics | Relativity
A cubical piece of heat-shield-tile from the space shuttle measures 0.15 m on a side and has a thermal conductivity of 0.065 J/(s·m·C°). The outer surface of the tile is heated to a temperature of 1300°C, while the inner surface is maintained at a temperature of 22°C. (a) How much heat flows from the outer to the inner surface of the tile in 5.0 minutes? (b) If this amount of heat were transferred to 3.0 liters (3.0 kg) of liquid water, by how many Celsius degrees would the temperature of the water rise?
Mechanics | Relativity
Explain third law of thermodynamics.
Mechanics | Relativity
Write centre of mass of triagle.
Mechanics | Relativity
An iron block, of mass 10 Kg, rests on a wooden plane inclined at 30 0 to the horizontal. It is found that the least force parallel to the plane which causes the block to slide up the plane is 10 N. Calculate the coefficient of sliding friction between wood and iron.
Mechanics | Relativity
A comet is observed to be 130 km long as it moves past an observer at a speed of 0.700c. How long does the comet seem when it travels at a speed of 0.900c with respect to the observer?
Mechanics | Relativity
Two identical mechanical waves travel different distance to a place where they interfere. One ware travels the distance of 20m, and second wave the distance of 60m. Wave length is the same 30 m. Calculate the phase offset, an inference ( constructive, or destructive).
Mechanics | Relativity
A tennis ball is dropped from 1.59 m above the ground. It rebounds to a height of 0.921 m.
With what velocity does it hit the ground?
2
021 (part 2 of 3) 10.0 points
With what velocity does it leave the ground? Answer in units of m/s.
022 (part 3 of 3) 10.0 points
If the tennis ball were in contact with the ground for 0.0147 s, find the acceleration given to the tennis ball by the ground.
acceleration of gravity is 9.8 m/s . Answer in units of m.
019 10.0 points
Answer in units of m/s .
The acceleration of gravity is 9.8 m/s . (Let down be negative.)
Answer in units of m/s.
Mechanics | Relativity
Four tanks A, B, C, and D are filled with monatomic ideal gases. For each tank, the mass of an individual atom and the rms speed of the atoms are expressed in terms of m and vmax respectively (see the table). Suppose that m = 2.33 × 10^-26 kg, and vrms = 1000 m/s. Find the temperature of the gas in each tank.
