Brad tries out a weight-loss plan that involves repeatedly lifting a 41.4-kg barbell from the floor over his head to a height of 2.00 m. If he is able to complete three such lifts per minute, how long will it take for him to lose 0.50 kg of fat? “Burning” 1 g of fat supplies 38.6 kJ to the body; of this, 10.0% can be used by the muscles to lift the barbell. (Ignore the fat “burned” while he lowers the barbell to the floor.)

According to the nutritional information on a package of jasmine rice, each serving (1/4 cup or 45.0 g) contains 160 Calories (kcal) of energy. If 3.03 g of jasmine rice is burned in a bomb calorimeter initially at 24.1°C and having a heat capacity of 8.93 kJ /°C, what will be the final temperature (in °C) of the calorimeter when the reaction is complete? Give 3 sig figs in your answer.

8

Gasoline and ethanol can both be used as a fuel source in cars.  However, the potential chemical energy is not equal.  A fuel mixture uses 85% ethanol and 15% gasoline called E85.  Assume a car is rated at 28.0 miles/gallon using gasoline only at $3.50/gallon and 22.5 miles/gallon using E85 at $2.85/gallon.  How much would it cost for using each fuel to drive 500.0 miles?

If an athlete expends about 7.10 x 10² Cal/hr then how many minutes would the athlete need to run to "burn off" the Calories consumed from eating a quarter-pound cheeseburger, French fries, and a chocolate shake that contains a total of 120. g carbohydrates, 49 g of fat, and 45 g of protein. Fat Carbohydrates Proteins Calories per gram 9.0 4.0 4.0 6713100 M

A serving of soup contains 2.0 g of fat, 19.0 g of carbohydrates, and 3.0 g of protein. Determine how many Calories (Cal) are contained in this serving

do it for me

One hour of bicycle racing can require 500-900 kcal of energy, depending on the speed of the race, the terrain, and the weight of the racer. Tour de France riders must consume abnormal amounts of food to supply this energy. Food in the form of protein or carbohydrates produces 17.0 kJ of energy per gram consumed. How many kilograms of protein or carbohydrate must be consumed to provide the energy for 195 minutes of racing that requires 650.0 kcal/hr. (Recall 1 kcal = 4.184 kJ)

Calculate the energy of combustion per gram of Olive Oil (kJ/g) if 29.9 mL of water is placed in the test tube and the temperature changes from 22.9 °C to 44.6 °C. The initial mass of the spirit burner is 204.60 g and the final mass is 204.51g. State your answer with correct significant digits. Notes: Include a negative sign if the reaction is exothermic Do not include units in your answer.

Before landing, the brakes and the tires of an airliner have a temperature of 15.0∘C. Upon landing, the 90.7 kg carbon fiber brakes of an airliner heat up to 312∘C. As the brakes start to cool down, the heat is absorbed by the 123 kg rubber tires. What is the specific heat of the tires if the final temperature of both the brakes and the tires at thermal equilibrium is 172∘C? Enter the answer with three significant figures. Use 1.400Jg∘C for the specific heat of carbon fiber.