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.

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

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 cylindrical glass of water (H2O) has a radius of 5.66 cm and a height of 15.8 cm. The density of water is 1.00 g/cm3. How many moles of water are contained in the glass?

Mechanics | Relativity

In an old house, the heating system uses radiators, which are hollow metal devices through which hot water or steam circulates. In one room the radiator has a dark color (emissitivity = 0.820). It has a temperature of 60.4 oC. The new owner of the house paints the radiator a lighter color (emissitivity = 0.491). Assuming that it emits the same radiant power as it did before being painted, what is the temperature (in degrees Celsius) of the newly painted radiator?

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

A mass *m* = 0.043 kg of benzene vapor (*L*_{v} = 3.94x10^{5} J/kg) at its boiling point of 80.1°C is to be condensed by mixing with water at 32.0°C. What is the minimum mass of water required to condense all of the benzene vapor? Assume the mixing and condensation take place is a perfectly insulating container.

Mechanics | Relativity

For his early morning exercises, Andee jogged 12 times around a circular track of a radius 5.0 m. Find total distance traveled and his displacement.

Mechanics | Relativity

If the magnitude of the resultant force is to be 9kN directed along the positive x axis, determine the magnitude of force T acting on the eyebolt and its angle delta.