One watt of energy is equivalent to 3.41 Btu/h. An old storeroom is convertedinto a movie studio. Four 650-watt spotlights are added to the room. Howmuch extra heat is produced by these spotlights when they are used?

Q: It takes 5000 J of energy to raise the temperature of a 1.5 kg sample of an unknown material by…

A:

Q: temperature

A: Given: Mass of the car = 1220 Kg Speed of the car = 32 m/s Mass of the iron = 30 Kg The kinetic…

Q: When a driver brakes an automobile, the friction between the brake drums and the brake shoes…

A:

Q: On a hot day, the temperature of a 76,000 L swimming pool increases by 1.10°C. What is the net heat…

A:

Q: The cooling system of an automobile motor contains 20.0 kg of water.  What is the Δt of the water if…

A:

Q: The heating plant at delivers up to 30MW (30MJ per second) of thermal power to the campus during…

A: Specific heat of water =4186 j/kgKChange in temperature =10 C

Q: Consider a person whose exposed surface area is 1.7 m2, emissivity is 0.5, and surface temperature…

A: Heat flow takes place from a region of higher temperature to a region of lower temperature.    In…

Q: Students on a spring break picnic bring a cooler that contains 5.3 kg of ice at 0.0°C. The cooler…

A:

Q: A 0.800-kg aluminum pan contains 4.00 kg of water at 20◦C. (Here are some numbers you may need:…

A: Given, Mass of Aluminum, mAl=0.8 kg, Mass of Water, mw=4 kg, Initial Temperature, T1=200, Specific…

Q: Suppose that you had water in a pot on a stovetop. Neglecting the material that the pot is made out…

A: Given data: Power (P) = 1000 W Mass (m) = 1.44 kg Initial temperature (T0) = 10°C Final temperature…

Q: If a river having a flow rate of 942 cubic feet per second flows over a waterfall having a height of…

A: Given The flow rate of the river is Q = 942 ft3/s. The height of the waterfalls is h = 14 m. The…

Q: ir at 23°C is blown over a hot pipe with a surface area of 3.88 m2 to dissipate 925 W of heat…

A: Temperature of air = 23oC Surface area (A) = 3.88 m2Power dissipated (P) = 925 W Temperature of…

Q: An automobile with mass 2000 kg is traveling at 20 m/sec. How much heat is developed in the brakes…

A: Given, mass of automobile m= 2000kg , speed v = 20m/s

Q: water heater is operated by solar power. If solar collector has an area of 6.00m2 , and the…

A: Volume of water = 1m3Density of water p = 1000 kg/m3Area of solar collector = 6m2Intensity by…

Q: 5. You run outside in the afternoon. Describe how heat is being transferred in the situation, using…

A: When heat energy is supplied to or absorbed from an object , the temperature of the object increases…

Q: Radioactive decay of granite and other rocks in Earth's interior provides sufficient energy to keep…

A: Given,

Q: A 1,280 kg car going 29 m/s is brought to a stop using its brakes. Let's assume that a total of…

A:

Q: An object has an emissivity of 0.725. At temperature T, it radiates heat at a rate of 10.W. What is…

A:

Q: Air at 24°C is blown over a hot pipe with a surface area of 3.85 m2 to dissipate 926 W of heat…

A:

Q: Consider a room that is initially at the outdoor temperature of 20oC. The room contains a 40-W…

A: Given Data:Power in a lightbulb Power in a TV set Power in a refrigerator Power in a iron  Assuming…

Q: (a) Cherry-red embers in a fireplace are at 850ºC and have an exposed area of 0.200m2 and an…

A: The net heat transfer by time,

Q: Consider a person whose exposed surface area is 1.7 m2, emissivity is 0.5, and surface temperature…

A: Heat flow takes place when there is a thermal gradient. One of the ways by which the heat flow is…

Q: bulb (spherical in shape) has a surface temperature of 140deg C when the room air temperature is at…

A: Given50 W incandescent light bulb(spherical in shape)Surface temperature of bulb, T1=140…

Q: When a driver brakes an automobile, the friction between the brake drums and the brake shoes…

A:

Q: Suppose you walk into a sauna that has an ambient temperature of 49 °C. (a) Calculate the rate of…

A: Step 1: Data GivenAmbient temperature = 49.0°CSkin temperature = 37.0°CEmissivity of skin = 0.98Area…

Q: Suppose we have 41.63g of water into which heat is transferred.  If the initial temperature was 4.87…

A: Mass of water, m=41.63 g Initial temperature, T1=4.87 ⁰c Final temperature, T2= 63.71 ⁰c Specific…

Q: The human body, while at rest, produces heat energy at a rate of about 100 W. How much sweat (in g)…

A:

Q: To determine the specific heat of an object, a student heats it to 100 ∘C∘C in boiling water. She…

A:

Q: Air at 21°C  is blown over a hot pipe with a surface area of 3.61 m2 to dissipate 922 W of heat…

A:

Q: Lake Erie contains roughly 4.50E+11 m3 of water. How much heat is required to raise the temperature…

A: Given , volume of water = 4.50E+11 m3  density of water = 1000 kg/m3 Difference in temperature of…

Q: A cube of steel is heated from 70 oF to 400 oF. If each side of the cube is 3.5 in, how much energy…

A: