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Nature of Energy Solutions Library

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69 solutions

Nature of Energy

Q. In the PhET simulation window, click the Systems tab, check the “Energy Symbols” box in the upper right, and use the simulation to recreate the ill...

Solved • Jun 30, 2020

Nature of Energy

Q. World energy supplies are often measured in the unit of quadrillion British thermal units (1012 Btu), generally called a "quad." In 2015, world ene...

Solved • Jun 30, 2020

Nature of Energy

Q. What is the source of the increase? (i.e. increase in atmospheric carbon dioxide)Check all that apply.(a) fermentation(b) burning of nuclear fuel(c...

Solved • Jun 25, 2020

Nature of Energy

Q. Why are scientists concerned about increases in atmospheric carbon dioxide?Scientists are concerned about the increase in atmospheric carbon dioxid...

Solved • Jun 25, 2020

Nature of Energy

Q. What is the greenhouse effect?The greenhouse effect is the ________ of the atmosphere that occurs when greenhouse gases __________ visible light to...

Solved • Jun 25, 2020

Nature of Energy

Q. Which dietary substance (sugar or fat) contains more Calories per gram?(a) sugar(b) fat

Solved • Jun 25, 2020

Nature of Energy

Q. What is the caloric content of sucrose in Cal/g?Express your answer using four significant figures.

Solved • Jun 25, 2020

Nature of Energy

Q. What is the caloric content of palmitic acid in Cal/g?Express your answer using four significant figures. 

Solved • Jun 25, 2020

Nature of Energy

Q. If you eat a piece of lasagna that contains 510 kcal of energy, how much energy do you consume in joules?A) 6.66 × 103 J B) 1.17 × 106 J C) 8.20 J ...

Solved • Sep 13, 2019

Nature of Energy

Q. The joule is a unit of A) concentration B) pressure C) energy D) volume

Solved • Aug 5, 2019

Nature of Energy

Q. Perform each conversion between energy units: 301 cal  to kJ.

Solved • Nov 12, 2018

Nature of Energy

Q. Perform each conversion between energy units: 3.01×106 kJ to kcal.

Solved • Nov 12, 2018

Nature of Energy

Q. Perform each conversion between energy units: 5.01×103 kJ  to kWh.

Solved • Nov 12, 2018

Nature of Energy

Q. Perform each conversion between energy units: 5.94×104 J  to Cal.

Solved • Nov 12, 2018

Nature of Energy

Q. A particular frost-free refrigerator uses about 755 kWh of electrical energy per year. Express this amount of energy in joules (J).

Solved • Nov 12, 2018

Nature of Energy

Q. A particular frost-free refrigerator uses about 755 kWh of electrical energy per year. Express this amount of energy in kilojoules (kJ).

Solved • Nov 12, 2018

Nature of Energy

Q. A particular frost-free refrigerator uses about 755 kWh of electrical energy per year. Express this amount of energy in Calories (Cal).

Solved • Nov 12, 2018

Nature of Energy

Q. What are the main sources of the energy consumed in the United States?a. fossil fuels: petroleum, natural gas, and coalb. wind energyc. nuclear fue...

Solved • Nov 12, 2018

Nature of Energy

Q. Explain global climate change.

Solved • Nov 12, 2018

Nature of Energy

Q. What is the evidence that global warming is occurring?

Solved • Nov 12, 2018

Nature of Energy

Q. Perform each conversion between energy units: 451 kWh to J.

Solved • Nov 12, 2018

Nature of Energy

Q. Perform each conversion between energy units: 329 kJ to Cal.

Solved • Nov 12, 2018

Nature of Energy

Q. Perform each conversion between energy unit: 595 Cal to J.

Solved • Nov 12, 2018

Nature of Energy

Q. Perform each conversion between energy units: 3.57×103 J to cal.

Solved • Nov 12, 2018

Nature of Energy

Q. Suppose that a person eats a diet of 2391 Calories per day. Convert this energy into J.

Solved • Nov 12, 2018

Nature of Energy

Q. Suppose that a person eats a diet of 2391 Calories per day. Convert this energy into kJ.

Solved • Nov 12, 2018

Nature of Energy

Q. Suppose that a person eats a diet of 2391 Calories per day. Convert this energy into kWh.

Solved • Nov 12, 2018

Nature of Energy

Q. What is thermochemistry? Why is it important?

Solved • Nov 12, 2018

Nature of Energy

Q. What is energy?

Solved • Nov 12, 2018

Nature of Energy

Q. Give some examples of each. Drag the appropriate items to their respective bins.• Kinetic Energy• Potential Energycompressed springraging riverbill...

Solved • Nov 12, 2018

Nature of Energy

Q. List some other common units of energy.

Solved • Nov 12, 2018

Nature of Energy

Q. One of the best-selling light, or low-calorie, beers is 4.4 % alcohol by volume and a 12-oz serving contains 110 Calories; remember: 1 Calorie = 10...

Solved • Oct 31, 2018

Nature of Energy

Q. A pound of plain M&M candies contains 96 g fat, 320 g carbohydrate, and 21 g protein.Table 5.5: Compositions and Fuel ValuesFuelValuekcal/g(Cal...

Solved • Oct 31, 2018

Nature of Energy

Q. Table 5.5: Compositions and Fuel ValuesFuelValuekJ/gkcal/g(Cal/g)Carbohydrate174Fat389Protein174Which releases the most energy when metabolized, 1 ...

Solved • Oct 31, 2018

Nature of Energy

Q. Table 5.5: Compositions and Fuel ValuesFuelValuekJ/gkcal/g(Cal/g)Carbohydrate174Fat389Protein174A particular chip snack food is composed of 14 % pr...

Solved • Oct 31, 2018

Nature of Energy

Q. Table 5.5: Compositions and Fuel ValuesFuelValuekJ/gkcal/g(Cal/g)Carbohydrate174Fat389Protein174How many grams of protein provide the same fuel val...

Solved • Oct 31, 2018

Nature of Energy

Q. A stalk of celery has a caloric content (fuel value) of 9.0 kcal. If 1.0 kcal is provided by fat and there is very little protein, estimate the num...

Solved • Oct 31, 2018

Nature of Energy

Q. You may want to reference (Pages 191 - 192) Section 5.8 while completing this problem.The sun supplies about 1.1 kilowatt(s) of energy for each squ...

Solved • Oct 31, 2018

Nature of Energy

Q. It is estimated that the net amount of carbon dioxide fixed by photosynthesis on the landmass of the Earth is 5.5 x 1016 g of CO2. All this carbon ...

Solved • Oct 31, 2018

Nature of Energy

Q. Table 5.5: Compositions and Fuel ValuesFuelValuekJ/gkcal/g(Cal/g)Carbohydrate174Fat389Protein174A serving of a particular ready-to-serve chicken no...

Solved • Oct 31, 2018

Nature of Energy

Q. Nutrition label for whole milk.Which value would change most if this label were for skim milk instead of whole milk: grams of fat, grams of total c...

Solved • Oct 31, 2018

Nature of Energy

Q. Which releases the greatest amount of energy per gram when metabolized: carbohydrates, proteins, or fats?

Solved • Oct 31, 2018

Nature of Energy

Q. The combustion of 45.0 g of methane (natural gas) releases 2498 kJ of heat energy.What amount of energy (in kilocalories) would be released for the...

Solved • Oct 25, 2018

Nature of Energy

Q. A 12-oz vanilla milkshake at a fast-food restaurant contains 551 Calories. What quantity of energy is this in joules?

Solved • Oct 25, 2018

Nature of Energy

Q. What happens to the chemical energy of a lithium-ion battery as it is discharged to power a laptop computer? Does it increase, decrease, or remain ...

Solved • Oct 25, 2018

Nature of Energy

Q. Two positively charged particles are first brought close together and then released. Once released, the repulsion between particles causes them to ...

Solved • Oct 25, 2018

Nature of Energy

Q. Convert this energy, 2.04×105 J to calories.

Solved • Oct 25, 2018

Nature of Energy

Q. A watt is a measure of power (the rate of energy change) equal to 1 J/s.Calculate the number of joules in a kilowatt-hour.

Solved • Oct 25, 2018

Nature of Energy

Q. A watt is a measure of power (the rate of energy change) equal to 1 J/s.An adult person radiates heat to the surroundings at about the same rate as...

Solved • Oct 25, 2018

Nature of Energy

Q. Use of the British thermal unit (Btu) is common in some types of engineering work. A Btu is the amount of heat required to raise the temperature of...

Solved • Oct 25, 2018

Nature of Energy

Q. What kind of energy is chemical energy?

Solved • Oct 25, 2018

Nature of Energy

Q. A pint of premium ice cream can contain 1100 Calories. What mass of fat, in grams and pounds, must be produced in the body to store an extra 1.1 x ...

Solved • Oct 16, 2018

Nature of Energy

Q. If an athlete expends 1950 kJ/h, how long does it take her to work off 1.0 lb of body fat? (1.0 lb needs 4.1x103 Cal of work) 

Solved • Oct 15, 2018

Nature of Energy

Q. Part A399 Cal to kilowatt-hoursExpress your answer using three significant figures.Part B20 J to caloriesExpress your answer using two significant ...

Solved • Sep 26, 2018

Nature of Energy

Q. To vaporize 1.00 g of sweat (water) from your skin, the water must absorb 584 calories. What is that value in kilojoules?

Solved • Sep 24, 2018

Nature of Energy

Q. A 2.7-g sample of rice is placed in a calorimeter. When the sample is burned 27 kJ is given off. Part AWhat is the energy value (kcal/g) for the ri...

Solved • Sep 18, 2018

Nature of Energy

Q. It took 1944 J to raise the temperature of a sample of water from 15.7°C to 33.7°C. Convert 1944 J to calories.

Solved • Sep 13, 2018

Nature of Energy

Q. A 0 60-g sample of vegetable oil is placed in a calorimeter. When the sample is burned, 17.9 k.J is given off. Part AWhat is the energy value (kcal...

Solved • Sep 12, 2018

Nature of Energy

Q. Convert the following energy units. a) 901 kJ to J b) 3290 kcal to kJ c) 7.86 x 106 J to kcal

Solved • Jul 25, 2018

Nature of Energy

Q. A chemistry grad student measures the performance Z of the new pump in his lab. The result is: Z = 7.1 kPa•mm3•s-1 Convert Z to mJ•s-1

Solved • Jul 10, 2018

Nature of Energy

Q. A NASA spacecraft measures the rate R of at which atmospheric pressure on Mars decreases with altitude. The result at a certain altitude is: R = 0....

Solved • Jul 10, 2018

Nature of Energy

Q. Which of the following energy quantities is equivalent to 258 Cal?a. 258 calb. 1080 Jc. 1080 kJd. 6.17 x 104 kJ 

Solved • Jun 25, 2018

Nature of Energy

Q. Convert the following energy units.

Solved • Jun 12, 2018

Nature of Energy

Q. The daily dietary energy requirement for an adult is 2.00 × 103 kcal (1 cal = 4.184 J). This is equivalent toa. 47.8 x 104 kJb. 8.37 x 103 kJ c. 8....

Solved • Mar 15, 2018

Nature of Energy

Q. (b) An adult person radiates heat to the surroundings at about the same rate as a 100-watt electric incandescent lightbulb. What is the total amoun...

Solved • Jul 12, 2016

Nature of Energy

Q. A watt is a measure of power (the rate of energy change) equal to 1 J/s. (a) Calculate the number of joules in a kilowatthour.

Solved • Jul 12, 2016

Nature of Energy

Q. Chemical energy is a type of which of  the following energies? A. Exchange energy B. Thermal energy C. Potential energy D. Kinectic energy

Solved • May 17, 2016

Nature of Energy

Q. Which of the following is true about methane in natural gas?A. The potential energy of methane is highest before methane combustionB. The potential...

Solved • Apr 5, 2016

Nature of Energy

Q. A refrigerator uses 900 kWh of electrical energy per year. How many joules of electricity are used in two years?A. 3.24 x 109 JB. 6.48 x 109 JC. 2....

Solved • Apr 5, 2016