calculate the lighting efficiency of this bulb and determine whether this is more or less efficient than a traditional incandescent lightbulb.

Q: A carbon dioxide laser used in surgery emits infrared radiation with a wavelength of 10.6 µm. In…

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Q: An apple loses 4.5 kJ of heat as it cools per degC drop in its temperature. The amount of heat loss…

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Q: An engineer is designing a cooling system for a chemical process that produces 52 kJ of heat every…

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Q: The solar panels are placed in an optimal position such that they receive a solar power of…

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Q: Suppose a person eats 2000 Kcal per day. Using the facts that 1 Kcal is approximately 4.2 Kj (a…

A: Joule is unit of energy or work. And Watt is the unit of power, which is energy per unit time. So,…

Q: A sample of gaseous krypton is heated with an electrical coil. If 39.5 Joules of energy are added to…

A: Given: Energy added, E = 39.5 joule  Mass, m = 11.5 g Initial temperature, Ti = 23 °C = 296 K

Q: The air temperature was 72.60° F during a thunderstorm, and thunder was timed 7.65 s after lightning…

A: Since the lighting is travelled in the air at the speed of light. And the thunder travels in the air…

Q: Farmer Jahiem wakes up early in the morning to start his work. Before working, he always eats a…

A: Given:A day in farmers life, with some details about his routine.Asked:To explain 3 specific energy…

Q: An electrician is wiring new electrical outlets in a house and has stored a 43.5-m length of copper…

A: Given data : Initial length Lo= 43.5 m T1=-11.90C T2=21.50C It is known that the coefficient of…

Q: this device functions by using a ____________ to detect changes in temperature (the red arrow is…

A: Bimetallic strip The bimetallic strip converts temperature into the mechanical displacement. In…

Q: The equation for the power emitted by the human body is P=5.67 X 10^-8 AT^4 . If the area of the…

A: Area of human body , A = 3.5 m2  Temperature , T = 25 ° C = 298.15 K To find = power emitted

Q: It's breakfast time and Mr. H entertains himself once more by watching the daily beetle race across…

A: The distance that beetle Angie must travel is,

Q: If you had beeswax attached to one end of a metal skewer and you placed the other end of the skewer…

A: As it is known that the metals are the good conductor of heat

Q: Our Sun shines bright with a luminosity of 3.828 x 1026 Watt. Her energy is responsible for many…

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Q: The fast and efficient cooking of microwave ovens made them one of the essential appliances in…

A: Required : Why the microwave ovens are more efficient.

Q: A habitat on Mars uses silicon solar panels that absorb heat from the sun, resulting in an increase…

A: Given Data: The heat energy per hour is Q =68750 C/hr The mass is m=175 kg=175000 g The specific…

Q: 5. A 35 W compact fluorescent bulb operates at 30.0 % efficiency. Calculate the amount of energy…

A:

Q: A star has a surface area of 6.99x1018 m2. How much power does it radiate if it has a surface…

A: Given: Surface area of star, A= 6.99 x 1018 m2 Surface temperature, T=5274 K   To determine power…

Q: Super Invar, an alloy of iron and nickel, is a strong material with a very low coefficient of…

A: Given : α = 0.2 × 10-6(°C)-1 Lo = 2 m ∆T = 5°C

Q: Physics 1@2 question

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Q: A thermometer is taken from an indoor enclosure to the outdoor environment, where the air…

A: Given data: The outdoor temperature is Tm=5o F. The temperature after t1=1 min is T1=55oF. The…

Q: A potato is placed in a microwave oven to verify the first law of thermodynamics. What is the…

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Q: A bottle of soda pop at room temperature (72°F) is placed in a refrigerator where the temperature is…

A: To find: To find the temperature of a soda using the given intervals

Q: About how hot does something have to get to glow red hot? a. 375 degrees F b. 800 degrees F c.…

A: The energy of electron increases when they are heated, due to this the emitted photons fall in the…

Q: A person consumes about 2300 Cal a day. 1 Cal = 4186 J and 1 kWh= 860 Cal.If a power company charges…

A: person consumes = 2300 cal in one day 1 kwh = 860 cal  cost of 1 kwh energy = 12 ¢ means cost of 860…

Q: Satellites designed to observe the radiation from cold (3 K) dark space have sensors that are shaded…

A: In heat transfer, conduction is the mode of heat transfer that allows the transfer of heat through…

Q: Lucky for us, our Earth is warmed by the Sun during the day. Every night though, Earth radiates some…

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Q: 0.863). It has a temperature of 67.0 °C. The new owner of the house paints the radiator a lighter…

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Q: 11) Two identical metal plates are painted, one matt whit black. These are placed at equal distances…

A: From Kirchoff's radiation law :- Ratio of emmissive power and absorptive power  of thermal radiation…

Q: Q5) The supergiant star Betelgeuse has a surface temperature of about 2900 K (only about half the…

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Q: One energy concept is a cogeneration system of photovoltaic solar cells combined with a thermal…

A: First law of thermodynamics states that internal energy of a system is converted into net work done…

Q: A 100 watt light bulb runs for 120 seconds. How much energy does it use?

A: Power of the light bulb, P = 100 W Time, t = 120 s   The amount of energy used by the light bulb is…

Q: A family comes home from a long vacation with laundry to do and showers to take. The water heater…

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Q: An aluminium rod with a mass of 80 kilograms at a length of 84.3cm with a radius of 2.8mm has a…

A: (1.3.1) Let R, ρ, l, A, and r denote the resistance, resistivity, length, cross-sectional area, and…

Q: When you turn your hot water on in the shower, it takes a bit for the water to get warm. Some of…

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Q: How much energy would have to be added to 519grams of water to heat it from 17.0°C to 84.0°C?…

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Q: Beryllium has roughly one-half the specific heat of liquid water (H20). Rank the quantities of…

A: Required : Rank of the energy input.

Q: Three cubes are made from the same material. As the drawing indicates, they have different sizes and…

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Q: A room is lighted by four 100 W incandescent lightbulbs. (The power of 100 W is the rate at which a…

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Q: A student is trying to decide what to wear.His bedroom is at 20°c.His skin Temperature is 35.0°c.The…

A: