marathoner
Q: When you jog, most of the food energy you burn above your basal metabolic rate (BMR) ends up as…
A:
Q: A house has well-insulated walls. It contains a volume of 100 m3 of air at 300 K. (a) Calculate the…
A: Type of room is insulated Volume of air: V = 100 m Temperature of room: T = 300 K Change in…
Q: At winter’s end, Lake Superior’s surface is frozen to a depth of ENV 1.3 m; the ice density is 917…
A:
Q: A crate of fruit with a mass of 31.0 kg and a specific heat capacity of 3600j/(kgxk) slides 8.40m…
A:
Q: An aluminum rod is 16.9 cm long at 20°C and has a mass of 350 g. If 11,500 J of energy is added to…
A:
Q: A wood stove is used to heat a single room. The stove is cylindrical in shape, with a diameter of…
A:
Q: An aluminum rod is 23.5 cm long at 20°C and has a mass of 350 g. If 10,500 J of energy is added to…
A:
Q: When you jog, most of the food energy you burn above your basal metabolic rate (BMR) ends up as…
A: Time , T = 39 min 1 cal = 4.186 J Q = 400 kcal /h for 30 min = 8.37 x 105 J To find = a) Amount of…
Q: 2. How much energy is absorbed when 130 g of ice at -15°C is heated until it completely melts into…
A:
Q: What is the magnitude of energy (in MJ) that must be removed to freeze 366 L of water with a density…
A: Given:- The volume of the water V = 366 L The water with a density = 999.8 Kg/m3 that is already…
Q: If you are stranded in a cold and snowy environment, it is never a good idea to eat snow for…
A:
Q: When you jog, most of the food energy you burn above your basal metabolic rate (BMR) ends up as…
A: The expression for the amount of heat energy required to evaporate the water is,Where, is the rate…
Q: How much water mass do you lose while running for 3.0 h? At body temperature the heat of…
A: Given data: Power (P) = 340 W Time (t) = 3.0 h Heat of vaporization = 2.4 × 106 J/kg Required: Mass…
Q: The specific heat (capacity) of a particular type of pasta is 1.8J/g· Celcius. Suppose you toss 340…
A: Given Specific heat of pasta cp = 1.8 J/g°C Mass of pasta mp = 340 g Temperature Tp…
Q: A wood stove is used to heat a single room. The stove is cylindrical in shape, with a diameter of…
A: Given Data: The stove is cylindrical in shape with diameter d = 40 cm. Length of the stove is l =…
Q: In an insulated vessel, 236 g of ice at 0°C is added to 565 g of water at 20.0°C. (Assume the latent…
A:
Q: What is the (approximate) total heat energy absorbed by the system after traversing the path AEC? *…
A:
Q: What is the magnitude of energy (in MJ) that must be removed to freeze 439 L of water with a density…
A:
Q: A 457.0 kg copper bar is put into a smelter for melting. The initial temperature of the copper is…
A:
Q: What is the magnitude of energy (in MJ) that must be removed to freeze 466 L of water with a density…
A: We have to first calculate mass of the water from given volume. In order to freeze the water, we…
Q: Nuclear fusion, the energy source of the sun and hydrogen bombs, occurs much more readily when the…
A: The average kinetic energy of the atoms is given as K=2.10×10-14 J
Q: The heat of combustion of gasoline is approximately 47 kJ /g . If a gasoline engine operated between…
A:
Q: A 100-gram apple is dropped off a 200 m high cliff. As it falls its temperature drops by 2.5 °C due…
A:
Q: You wish to chill 12 cans of soda at 25.0 °C down to 5.0 °C beforeserving them to guests. Each can…
A: The initial temperature of the cans is, The final temperature of the cans is, The total mass of…
Q: The total internal kinetic energy of 5 gallons of water is 2x10^8 J. The total kinetic internal…
A:
Q: A 11.1 kg loose bag of soil falls 15.55 m at a construction site. If all the energy is retained by…
A: Given, m = 11.1 kg h = 15.55 m Thus, mgh = mcΔT gh = cΔT ΔT = gh / c
The marathoner generates approximately 4.0 MJ/h of energy during the run. How much water does he lose during a 2.5 h long run if most of the energy is used for evaporation? (The solution is 4.4 kg)
Step by step
Solved in 2 steps with 2 images
- It is difficult to extinguish a fire on a crude oil tanker, because each liter of crude oil releases a large amount of energy, 2.80 × 107 J, when burned. To illustrate this difficulty, calculate the number of liters of water that must be expended to absorb the energy released by burning 0.95 L of crude oil, if the water has its temperature raised from 20.0°C to 100°C, it boils, and the resulting steam is raised to 300°C. The latent heat of vaporization for water is Ly 2256 kJ/kg, and in this problem, take 1520 J/kg.°C as the specific heat of steam. V =How much heat energy must be removed from 0.10 kg of oxygen with a temperature of 22 °C in order for the oxygen to liquefy at -183 °C? (Co = 913 J/kg°C, Ly = 2.13 x 105 J/kg and oxygen liquefies as -183 °C) O 5 x 10^4 J O 9 x 10^4 J O 1 x 10^4 J O 4 x 10^4JA woman expends 95 kJ of energy in walking a kilometer. The energy is supplied by the metabolic breakdown of food intake and has a 35 percent efficiency. If the woman drives a car over the same distance, how much energy is used if the car gets 8.8 km per liter of gasoline (approximately 20 mi/gal)? The density of gasoline is 0.71 g/mL, and its enthalpy of combustion is 49 kJ/g. Enter your answer in scientific notation. Compare the efficiencies of the two processes. kJ (driving)/ kJ (walking)
- When you jog, most of the food energy you burn above your basal metabolic rate (BMR) ends up as internal energy that would raise your body temperature if it were not eliminated. The evaporation of perspiration is the primary mechanism for eliminating this energy. Determine the amount of water you lose to evaporation when running for 58 minutes at a rate that uses 400 kcal/h above your BMR. (That amount is often considered to be the "maximum fat-burning" energy output. The latent heat of vaporization of water at room temperature is 2.5 106 J/kg.) A) _________ kgB)The metabolism of 1 gram of fat generates approximately 8.63 kcal of energy and produces approximately 1 gram of water. (The hydrogen atoms in the fat molecule are transferred to oxygen to form water.) What fraction of your need for water will be provided by fat metabolism?______________ %To keep yourself warm in the winter, you heat a solid metal ball and place it on a stand in the center of your room. The ball has a radius of 17.0 cm and an emissivity of 0.830. If your room has a temperature of 15°C, what is the net power radiated by the ball initially, when the ball's temperature is 200°C?Rubbing your hands together warms them by converting work into thermal energy. If a woman rubs her hands back and forth for a total of 10 rubs, at a distance of 7.50 cm per rub, and with a frictional force of 50.0 N, what is the temperature increase in degrees Celsius? The mass of tissue warmed is only 0.100 kg, mostly in the palms and fingers.