aluminum sample increases its temperature by 443◦C, when it absorbs 2000J. What is the mass of the sample

What is the average kinetic energy of a molecule of oxygen at a temperature of 300. K?

The volume of an automobile tire is 2.5 × 10−2m3 . the pressure of the air in the tire is  3 atm and the temperature is 37C ◦ . what is is the mass of air in grams ? The mean molecular mass of air is 29g.                                     1 atm = 1.01  × 105 Pa ;    Calculate to 2 decimals.

Part A A small, 250 g cart is moving at 1.50 m/s on a frictionless track when it collides with a larger, 5.00 kg cart at rest. After the collision, the small cart recoils at 0.870 m/s. What is the speed of the large cart after the collision? Express your answer with the appropriate units. ? Value Units

There is a .32 kg block of silver that is 21 °C. If silver's melting point is 961°C, how much thermal energy would a scientist need to melt this block of silver? (Hf = 111 kJ/kg). Hf is the heat of fusion of silver! Solve, assuming that the specific heat of silver is .24 J/g*degC, or 235 J/kg*K.

A certain ideal gas of volume V1 = 6.0 x10-3 m3 is at pressure P1 = 90 kPa and at temperature T1=20°C. When its volume increases to V2 = 12x10-3 m3 and the temperature goes up to T2 = 70°C, how much is the pressure in kPa?

A metal tank with a capacity of 1700 L is completely filled with ethanol when both the tank and the ethanol are at temperature 19.0 ∘C. Then the tank and its contents are brought underground, where the temperature is 10.0 ∘C . What volume of air will there be above the ethanol in the tank after the system has cooled off to the ground temperature? The coefficient of volume expansion for ethanol is βe = 7.50×10−4 K−1 . The tank is made of a metal for which the coefficient of linear expansion is αt = 1.20×10−5 K−1. a) Find the change in volume of the metal tank, ΔVt, and that of the ethanol in it, ΔVe b What volume of air Vair will there be above the ethanol in the tank after the system has cooled off to the ground temperature?

The initial temperature of three moles of oxygen gas is 33.5°C, and its pressure is 7.80 atm. (a) What will its final temperature be when heated at constant volume so the pressure is two times its initial value? °C (b) Now the volume of the gas is also allowed to change. Determine the final temperature if the gas is heated until the pressure and the volume are doubled. °C

A concrete swimming pool 12 m x 6 m x 2.5 m is filled with water to within 6 mm of the top when the temperature is 10 oC. The coefficient of linear expansion of the concrete is 0.90 x 10-5/oC. What will happen to the water level as the temperature rises? If it rises at what temperature will the water begin to overflow?

The number density of gas atoms at a certain location in the space above our planet is about 3.60 x 1011 m-3, and the pressure is 2.30 x 10-10 N/m² in this space. What is the temperature there? °C Additional Materials O Reading