n a pressure cooker, water molecules have a velocity of vrms = 738 m/s.      a.     What temperature H2O molecules have? b.    Initially, when you close the lid, air is trapped inside the cooker. Do air molecules have the same vrms that H2O molecules? Earth’s atmosphere is composed mainly of N2, O2 and Ar. Explain. (No calculations needed)

A2.9 kg lump of aluminum is heated to 95°C and then dropped into 10.0 kg of water at 5.0°C. Assuming that the lump-water system is thermally isolated, what is the system's equilibrium temperature? Assume the specific heats of water and aluminum are 4186 and 900 J/kg-K, respectively. Number i Units

At high noon, the Sun delivers 990 W to each square meter of a blacktop road. What is the equilibrium temperature of the hot asphalt, assuming its emissivity e = 1? (σ = 5.67 × 10−8 W/m2?K4) . a. 364°C b. 637°C c. 90.5°C d. 181°C e. 136°C

P3. After a particularly cold night, Alice leaves a tub of water outside. You may consider the ground and air to have temperatures of T. = -10°C and T = 10°C respectively. How thick is the layer of ice that forms at the bottom of the tub of water, after the tub has been left outside for a long time? The tub of water initially has a layer of water of thickness họ = 10 cm. You may assume that the ground and air remain at a constant temperature throughout, and that the side lengths of the tub a, b > ho, i.e. the heat conduction is one- dimensional. Density of ice and water are Pice = 920 kg/m³ and Pw = 1000 kg/m³. Ice and water have thermal conductivities of kice = 2.22 WK-1m-1 and kiw = 0.556 W K-1m-1.

Suppose that the rms speed of carbon dioxide molecules, with molar mass of 44.0 g/mol, in a flame is found to be 1.2 × 105 m/s a.What temperature, in kelvins, does this represent?  b. What temperature, in celsius does this represent?

A cylinder containing 5.00 mol of nitrogen gas is at room temperature (300 K). If the pressure of the gas is held constant and the gas is heated, how much energy must be transferred by heat to the gas to increase its temperature by 100 K? Select one: O a. 3.24 x 104 J O b. 1.46 x 104 J O c. 2.15 x 104J d. 0.94 x 104 J O e. 1.04 x 104 J O