The Flash (m -70 kg) has been timed running around the Earth's circumference (1.274 x 10 m) in only 5 minutes. What is the Flash's kinetic energy? (in J) If one cheeseburger provides 500 kcal of energy, how many cheeseburgers would the Flash need to eat to reach this speed? (Use 1 kcal-4.186 kJ)
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- The summit of a mountain is 5540 m above sea level. (a) How much energy would a 87 kg climber expend against the gravitational force on him in climbing to the summit from sea level? (b) How many candy bars, at 2.13 MJ per bar, would supply an energy equivalent to this? Your answer should suggest that work done against the gravitational force is a very small part of the energy expended in climbing a mountain. (a) Number Units (b) iJudy has started fast walking for half an hour each day in an effort to lose weight. Judy currently weighs 100 kg. She walks expending about 0.1 kcal per kg of body weight per minute. For a woman, we multiply the body weight in kg by 0.9 kcal/kg body weight/hour to calculate her BMR. What is Judy’s daily energy expenditure? (Ignore TEF due to its small portion)?A weight lifter raises a 100 kg barbell to a height of 2 m. what is the barbell's potential energy? Calculate answer to one decimal.
- Under normal conditions the human heart converts about 12.7 J of chemical energy per second into 1.27 W of mechanical power as it pumps blood throughout the body HINT (a) Determine the number of Calories required to power the heart for one day, given that 1 Calorie equals 4186 J. Cal (b) Metabolizing 1 kg of fat can release about 9000 Calories of energy. What mass of metabolized fat (in kg) would power the heart for one day? kg Need Help? Watch it Read ItLarge meteors sometimes strike the earth , converting most of their kinetic energy into thermal energy. what is the kinetic energy of a 10^9 kg meteor moving at 25.0 km/s?How much work is done (in J) when a weight lifter lifts 190 kg from 1.5 m to 2.0 m above the ground? (Use 9.8 m/s2 for g.)
- Loki is standing on top of the Avenger's Tower. If the tower is 72 m tall and Loki has a mass of 55 kg, what is Loki's potential energy at the top of the tower? Do NOT include units Use g = 9.8 m/s2 Round to the nearest whole numberIf the average household in a region consumes about 5,250 kWh of energy per year. In the region, the average annual solar energy potential is about 1,450 kWh/m² per year. If solar panels are available in sizes of 1 m x 1 m with an efficiency of 18 %, how many panels will be needed to power a house? (Since you can't have a fraction of panel, always round up you number to the next integer.) Your Answer: AnswerHow much work (in J) is done for an object moving from x=1m to x=5m?