You are asked to test a machine that the inventor calls an“in-room air conditioner”: a big box, standing in the middleof the room, with a cable that plugs into a power outlet.When the machine is switched on, you feel a stream of coldair coming out of it. How do you know that this machinecannot cool the room?

Q: 4. A calorimeter contains 1.500kg of water at 80.0°C. Then 0.500kg of ice at -5.00 Cis added to the…

A: The heat capacity of water is C= 4.187 kJ/ kg K and for ice, it is c = 2.108 kJ/kg K.

Q: An insulated cup of water (145g water) at room temp (20C), is warmed by a 25g sample of aluminum at…

A:

Q: (1a). Figure shows a person is warming his hands over the fire. Explain in detail how the heat…

A: The heat transfer from fire to the hands takes place through radiation. The fure emits the radiation…

Q: Brewed coffee is often too hot to drink right away. You can cool it with an ice cube, but this…

A:

Q: A heating coil inside an electric kettle delivers 5.10 kW of electric power to the water in the…

A:

Q: Consider a classroom for 63 students and one instructor, each generating heat at a rate of 100 W.…

A: To determine the rate of internal heat generation in the classroom when it is fully occupied, we…

Q: The “steam” above a freshly made cup of instant coffee is really water vapor droplets condensing…

A: The heat will be, Q=McΔT Also, Q=mLv Thus we have, ΔT=mLvMc

Q: You have a double-pane window that is 120.0 cm wide by 80.0 cm tall; the gap between the window…

A: Step 1: Data provided in the problem Area of the window pan A=120 cm×80 cm=1.20 m×0.80 m=0.96…

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 rubber ball of radius 2.52 m and emissivity 0.940 is heated to 128°C. HINT (a) Convert the given…

A: a) The given temperature in kelvin is TK=T°C+273=128+273=401K

Q: Two concrete spans of a 280-m-long bridge are placed end to end so that no room is allowed for…

A: Length of concrete "L"= 280m Increased in temperature "∆T"= 24°C Coefficient of expansion =…

Q: It’s a hot day, and your apartment is rather warm. Your roommate suggests cooling off the apartment…

A:

Q: sample of gas in a cylinder with a piston is in thermal contact with a heat reservoir at a…

A:

Q: Thermal Pendulum Clock. One problem that early pendulum clocks faced was inconsistencies due to…

A: at T= 15 degrees, the time period is 2 seconds, 2=2πl0g at T = 40 degrees the time period is…

Q: A European recipe calls for a cake to be baked at 176 Celsius. Of course we have stoves with dials…

A:

Q: An insulated Thermos contains 190 cm³ of hot coffee at 85.0°C. You put in a 16.0 g ice cube at its…

A:

Q: (A) Loose electrons move quickly away from hot locations, making it impossible for energy to move…

A: Introduction : Loose electrons are the outer electrons which are held loosely in the atom.

Q: 50.0 g ice cube, intially at 0° C, is dropped into a Styrofoam cup containing 350 g of water,…

A:

Q: Help.... Its wintertime and you are in need of portable electrical heater for your room and you are…

A:

Q: A 6-pack of 12 fl. oz. soda cans is placed inside an insulated container. Ice is added to the cooler…

A:

Q: Liquid water turns out to have a higher density at 4C degrees than at any other temperature. What…

A: Thermal expansion coefficient describe the relation between the size of an object and change in the…

Q: Question 1: Water enters a tube (shown below) at a flow rate of 6 lit/min and an inlet temperature…

A: Note: As per the guidelines, we can only answer three subparts of a question. Sorry for the…

Q: A 1.30 kg sample of water at 13.0°C is in a calorimeter. You drop a piece of steel with a mass of…

A:

Q: ou are in space, compare the rate of heat loss for bare skin vs. a nice thick layer of…

A: Average mass of human m=75 kg and average/room temperature T=298 K. Specific heat of human body…

Q: Randy is nervous oboOut Physics 102 exam that he can't concentrate. To relax he, goes to Starbucks…

A: volume of coffee (V) = 470 ml Initial temperature of coffee = 80oC Final temperature of coffee = 40o…

Q: A small electric immersion heater is used to heat 84 g of water for a cup of instant coffee. The…

A: Given : mass, m = 84 g = 84 × 10-3 Kg  Power, P = 81 W  T1= 21 ℃ = 294 K  T2=100 ℃ = 373 K  Specific…

Q: You haven’t had time to install your new air conditioner in the window yet, so as a short-term…

A: Given:- A person has run out of time and he has installed a new air conditioner in the window. So as…

Q: What is the change in internal energy of a system which does 4.50×105J of work while 3.00×106 J of…

A: The change in internal energy(ΔU) of a system.given,workdone(W)=4.50×105 J Heat goes…

Q: You are thinking ahead to spring when one of your friends is having an outdoor wedding. Your plan is…

A: Given: M = mass of lemonade = 5.6 x103 kg = 5600 gm S = specific heat capacity of water = 1.0…

Q: 10. Show that the change in density Ap with change in temperature AT is given by Ap = - BPAT where…

A: We know that, Density (ρ)= mass(m) / volume (v) ρ= m/V Differentiating both sides with respect to V…

Q: If I add 11664 J of energy to an ideal gas inside a balloon, causing the internal energy to increase…

A: Write the given values with the suitable variables. Q=11664 JΔU=7278 J Here, Q and ΔU are the amount…

Q: At the bottom of an old mercury-in-glass thermometer is a 35-mm³ reservoir filled with mercury. When…

A: Initial volume  Radius of capillary tube Change in temperature

Q: (a) Calculate the rate of heat conduction (in W) through house walls that are 12.5 cm thick and that…

A: Given data dx=0.125 mA=125 m2T1=21.5°CT2=5°C Here, dx is the thickness of the walls. While A is the…

Q: One winter day, the climate control system of a large university classroom building malfunctions. As…

A: Given: The volume of cold air is 500 m3. Time duration is 1 min. The temperature change is 10…

Q: You just took a jar out of the fridge but you are unable to open it. You then decide to leave run…

A: Most of the time lid is made of metals. So when it is taken out from freeze . It actually get…

Q: A tungsten light bulb filament may operate at 2900 K. What is its Fahrenheit temperature? What is…

A:

Q: How long does it take to raise the temperature of a 0.750-kg aluminum pot containing 2.50 kg of…

A:

Q: Liquid water turns out to have a higher density at 4 Degrees Celcius than at any other temperature.…

A:

Q: Consider the change in the internal energy of a system. -What is the change in the internal energy,…

A: Given data: Work done by the system (W) = 4.725×105 J Heat added (Qin) = 3.2×106 J Heat rejected…