A large room in a house holds 975 kg of dry air at 30.0°C. A woman opens a window briefly and a cool breeze brings in an additional 50.0 kg of dry air at 18.0°C. At what temperature will the two air masses come into thermal equilibrium, assuming they form a closed system? (The specific heat of dry air is 1 006 J/kg ∙ °C, although that value will cancel out of the calorimetryequation.)

Q: At a local convenience store, you purchase a cup of coffee, but, at 98.4°C, it is too hot to drink.…

A: Given: Initial temperature of coffee T1 = 98.4°C Initial mass of coffee V = 248 mL Give that density…

Q: An ice bag containing 0°C ice is much more effective in absorbing heat than one containing the same…

A:

Q: (a) You have a styrofoam container with 937 g of tomato juice (specific heat of 3,980 1/(kg-"C)) at…

A: Given:mass of the juice, M =937g=0.937kgspecific heat of the juice, C1 = 3980 J/kgoCinitial…

Q: A beaker of negligible heat capacity contains 456 g of ice at -25.0°C. A lab technician begins to…

A: The beaker initially contains 456 grams of ice, at -25 C. Water converts into ice as soon as the…

Q: If 200 cm^3 of tea at 95°C is poured into a 150-g glass cup initially at 25°C, what will be the…

A:

Q: An aluminum rod is 23.5 cm long at 20°C and has a mass of 350 g. If 10,500 J of energy is added to…

A:

Q: A container holds 2.0 g of Helium at a pressure of 6.0 atm. (a) How much heat is required to…

A: Let n denotes the number of moles of the Helium gas. Let m is the mass of the Helium in a container…

Q: A 3.00-g copper coin at 25.0°C drops 77.0 m to the ground. (a) Assuming 61.2% of the change in…

A: Given: The mass of the coin is 3.00 g. The initial temperature of the coin is 25 °C. The height of…

Q: A styrofoam cooler (k = 0.030 W/(m-°C) has outside dimensions of 0.130 m x 0.270 m x 0.280 m, and an…

A: The conductivity of the Styrofoam is 0.030 W/m·°C. The dimension of the cooler is 0.130 m×0.270…

Q: How much water mass do you lose while running for 3.0 h? At body temperature the heat of…

A: Given data: Power (P) = 340 W Time (t) = 3.0 h Heat of vaporization = 2.4 × 106 J/kg Required: Mass…

Q: Initially you have mwater=4.2kg of water at Twater=66 degrees celcius in a insulated container. You…

A: Recall Q=mc∆T Also, principle of calorimetry. Heat lost by hotter body=heat gained by colder body

Q: (a) The number of kilocalories in food is determined by calorimetry techniques in which the food is…

A: Given: The mass of peanut is mp=4.6 g. The mass of water is m=0.6 kg. The mass of aluminium is…

Q: The height of the Washington Monument is measured to be 170 m on a day when its temperature is…

A: The thermal coefficient of expansion of the marble is, α=2.5×10-6 /°C The change in the temperature…

Q: We pour 0.200 Kg of hot coffee at 80◦C into a silver cup of mass equal to 0.400 Kg which is…

A:

Q: A 5.157 kg loose bag of soil falls from unknown height at a construction site. What is height in m…

A:

Q: A pronghorn antelope can run at a remarkable 18 m/sm/s for up to 10 minutes, almost triple the speed…

A: mass (m) = 32 kg speed (v) = 18 m/s Power = 3.4 kW = 3400 Wtime = 10 minutes

Q: A 30 kg male emperor penguin under a clear sky in the Antarctic winter loses very little heat to the…

A: a. Let T and T0 denote the given penguin’s surface temperature and the temperature of its…

Q: In an insulated vessel, 236 g of ice at 0°C is added to 565 g of water at 20.0°C. (Assume the latent…

A:

Q: Two metal rods (steel and brass) are both 5.55m long at 20.00°C. The coefficient length expansion…

A:

Q: You have 1.60 kg of liquid ethanol at 28.0°C that you wishto cool. What mass of ice at initial…

A: Concept As we add the ice to the liquid ethanol, the temperature of the ethanol decreases because it…

Q: Electronic device generates 30 W of heat during normal operation. The heat is dissipated from the…

A: Rate of heat production,  Temperature of the ambient air,  Surface area,  Heat transfer coefficient,…

Q: Nuclear fusion, the energy source of the Sun, hydrogen bombs, and fusion reactors, occurs much more…

A:

Q: A rock of mass 0.425 kg falls from rest from a height of 20.5 m into a pail containing 0.487 kg of…

A:

Q: A steel rod is initially 1 meter long at a temperature of 20°C. Assuming that the expansion is…

A: Original length (L0) of the steel rod = 1 meter.Initial temperature (T0) of the steel rod = .Final…

Q: A pure aluminum plate is part of a heat shield for a manufacturing process. The aluminum plate has a…

A: Step 1:Step 2: Step 3: Step 4:

Q: The height of the Washington Monument is measured to be 170 m on a day when its temperature is…

A: The change in length of the object is, ∆L=L0α∆T=L0αTf-Ti=170 m2.50×10-6/°C-3.9°C-35°C=-0.0165 m

Q: ν

A: Given that : FA = -E a dT / v , this is the formula to find the thermal expansion of the stress. dT…

Q: The height of the Washington Monument is measured to be 170 m on a day when the temperature is…

A: Length of monument at 39 degree celsius (L) = 170 m New temperature = -16.5 degree celsius

Q: Three 45.0g cubes of ice at 0 degrees celcius are dropped into a 5.00*10^2 mL of tea at 20 degrees…

A: Given:-   The mass of the ice cube is 45 g  The number of ice cube used is n = 3  The volume of the…

Q: A large room in a house holds 947 kg of dry air at 33.2°C. A woman opens a window briefly and a cool…

A: Solution:   Given Values, Mass of dry air (m1)=947 Kgtemperature (t1)=33.20 CMass of added air…

Q: Air (cp = 1005 J/kg·K) enters a cross-flow heat exchanger at 20°C at a rate of 3 kg/s, where it is…

A: Given data The specific heat of air of a cross-flow heat exchanger is cp = 1005 J/kgK The inlet…

Q: large room in a house holds 957 kg of dry air at 32.2°C. A woman opens a window briefly and a cool…

A:

Q: If you lie on the ground at night with no cover, you get cold rather quickly. Much of this is due to…

A: Solution: Given that T0 =  -40 °F = 233.15 K T = 86 °F = 303.15 K

Q: A 100-gram apple is dropped off a 200 m high cliff. As it falls its temperature drops by 2.5 °C due…

A:

Q: Water with a mass of mW = 0.400 kg and temperature of TW = 18.5°C is poured into an insulated bucket…

A:

Q: A rock of mass 0.432 kg falls from rest from a height of 17.4 m into a pail containing 0.373 kg of…

A:

Q: A chunk of ice at − 20 degrees C is added to a thermally insulated container of very cold water at 0…

A: Option (D) is the correct answer. Some of water freezes and the chunk of ice gets larger.

Q: A large room in a house holds 975 kg of dry air at 30.0°C. A woman opens a window briefly and a cool…

A: From heat transfer equation,

Q: A 60.0-kg runner expends 300 W of power while running a marathon. Assuming 10.0% of the energy is…

A: Determine the energy spent by the runner.