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 20 rubs, at a distance of 7.50 cm per rub, and with an average frictional force of 40.0 N, what is the temperature increase? The mass of tissues warmed is only0.100 kg, mostly in the palms and fingers.

Q: A runner generates 1260 W of thermal energy. If this heat has to be removed only by evaporation, how…

A: It is given that,

Q: Two blocks of copper, one of mass 1 kg and the second of mass 3 kg, are at the same temperature.…

A: Using the thermal energy equation, The thermal energy is proportional to the mass Here, both the…

Q: Following vigorous exercise, the body temperature of an 80.0-kg person is 40.0ºC . At what rate in…

A: The amount of heat transfer is given as, Here, m, c and ΔT represent the person’s mass, the…

Q: 7. Consider a material with a mass of 1.3 kg and a specific heat capacity of 1.7 J/kg°C. Compute for…

A:

Q: I have 500g of water at 25oC. If the amount of heat required to raise the temperature of this water…

A: Given data:Mass of the water, m = 500 g = 0.5 kgThe specific heat of water, C = 4.186 joule/gram…

Q: 1. 500J of work are done on a system in a process that decreases the system’s thermal energy by…

A: According to the first law of thermodynamics, ∆U=Q+WQ=∆U-W Here, ∆U is the change in the internal…

Q: a 7.56 m long aluminum pipe sits out in the sun. if the temperature goes from 15 c to 33 c how much…

A: Recall ∆L=αL∆T

Q: How many slices of pizza must you eat to walk for 1.0 h at a speed of 5.0 km/h? (Assume your mass is…

A: The average metabolic power for a 68 Kg individual to walk at the given speed is 380 W and the…

Q: According to the USDA, an average, \moderately active" college student needs to eat 2500 calories…

A:

Q: In a calorimetry experiment, two liquid substances X and Y with the same mass are placed in separate…

A:

Q: Following vigorous exercise, the body temperature of an77-kg person is 42 degrees celcius. At what…

A: The specific heat coefficient of the body is 3500 J/(kg.°C). The amount of heat released in the…

Q: A concerned mother is dressing her child for play in the snow. The child's skin temperature is…

A: Given: The emissivity of the child's skin ε= 0.700 Exposed area A=1.25 ✕ 10-2 m2 Skin temperature…

Q: ENGINEERING APPLICATION. You designed a home that contains 1.00 x O^5 kg of concrete [specific heat…

A:

Q: A room has a pine ceiling (k = 0.12 WI(m-Cº) ] that measures 3.0 m x 4.0 m 2.0 cm. On a cold day,…

A: We need to calculate how much energy will be saved if we use wool as an insulator.

Q: What is the change in the internal energy of a system when a total of 150.00 J is transferred by…

A:

Q: A copper block is removed from 330°C oven and immediately dropped into 2.25 L of water at 21°C.in an…

A: Given, Initial temperature of Copper block = 330o C Amount of Water = 2.25 L =2.25 kg Specific Heat…

Q: An aluminum rod is 20.0 cm long at 20.0°C and has a mass of 0.350 kg. If 1.00 x 104 J of energy is…

A: Given,

Q: A 250-g aluminum cup contains 700 g of water in thermal equilibrium with the cup at 75°C. The…

A:

Q: (k-0.84 J/sm'C) in one minute if the temperature difference between two sides of the window is 10.…

A:

Q: Following vigorous exercise, the body temperature of a 75.0 kg person is 38.7°C. At what rate in…

A: Write the formula for the specific heat in terms of the energy transferred out. Write the formula…

Q: A 0.200-kg aluminum cup contains 800. g of water in thermal equilibrium with the cup at 80.°C. The…

A: Given,

Q: What is the change in internal energy of a system which does 4.50×105J of work while 3.00×106 J of…

A: The change in internal energy(ΔU) of a system.given,workdone(W)=4.50×105 J Heat goes…

Q: If ten grams of ice at 0 degree celcius is converted to water with temperature of 20 C degree, what…

A: To find the amount of heat required to raise the temperature of a mass m, we use the formula Q =…

Q: In a calorimetry experiment, two liquid substances X and Y with the same mass are placed in separate…

A:

Q: 25) In a flask, 114.0 g of water is heated using 67.0 W of power, with perfect efficiency. How long…

A:

Q: A 2.0-kg aluminum block is originally at 10 degrees celcius. If 36 k) of energy are added to the…

A: Given:Mass(m)=2 kg , specific heat (cp)=900 J/kg.KAdded heat = 36000 JInitial temperature,Ti=10°=283…

Q: 100J of heat energy are transferred to 70 g of mercury. By how much does the temperature increase?…

A: given Mass m =70 g = 0.07 kg Heat given Q =100 J

Q: A 2.0-kg aluminum block is originally at 10 degree Celcius. If 36 kJ of energy are added to the…

A: Given Data: The mass of the aluminum block is, m = 2 kg. The initial temperature is, t = 10° C. The…

Q: The human body, while at rest, produces heat energy at a rate of about 100 W. How much sweat (in g)…

A:

Q: The same energy Q enters five different substances as heat. Which of these has the greatest specific…

A:

Q: of copper whose mass is 15 kg has a specific heat capacity 390 J/kgx and is warmed by Coco Martin so…

A: Mass of copper, m=15 kg Specific heat capacity, C=390 J/kg OC CChange in temperature = 5 o C

Q: Thermal energy is added to 150 g of water at the rate of 55 J>s for2.5 min. How much does the…

A: Here, Q=55J/s×2.5×60s=8250J

Q: A styrofoam container used as a picnic cooler contains a block of ice at 0°C. If 564 g of ice melts…

A: Given data:  Mass of ice (m) = 564 g = 0.564 kg Time (t) = 1 hour = 3600 seconds The heat of fusion…

Q: Suppose that the breakfast of a typical 65 kg adult gives him 1.85 x 105 J of energy. How long does…

A: Given: The mass of the adult m = 65 kg The energy had in breakfast E = 1.85 x 105 J The acceleration…

Q: The temperature of an aluminum disk is increased by 250 ∘C. By what percentage does its volume…

A: Consider the amount of the temperature increased of the aluminum disk be ∆T, the initial volume of…

Q: On a hot dry day, evaporation from a lake has just enough heat transfer to balance the 1.00 kW/m2 of…

A: Given: The heat transfer from the sun is Q=1 kW/m2. The time of evaporation is t=1 h. The area of…

Q: During a process, the internal energy of a system increases by 16 Kj, at the same time it performs a…

A: According to the first law of thermodynamics,  dQ = dU + dW  where, dQ is the heat supplied, dU is…

Q: A 150-g aluminum cup contains 650 g of water in thermal equilibrium with the cup at 55°C. The…

A:

Q: Approximately how much energy would be required to raise the temperature of the top layer of the…

A: The expression for heat energy is. Q=mc∆Tm=ρ·VQ=ρ·V·c∆T

Q: After eating a 200 g bottle of yogurt, Bob decides to go for a run to burn off the extra energy. The…

A: Given: Mass of the yogurt eaten by bob = 200 g Energy from the yogurt = 5.4 MJ/kg Metabolic rate of…

Q: The human body, while at rest, produces heat energy at a rate of about 103 W. How much sweat (in g)…

A: The expression for the amount of sweat is,

Q: A runner generates 1260 W of thermal energy. If this heat has to be removed only by evaporation, how…

A: Given, time=15min=15x60=900s Thermal Energy = 1260W= 1260 J/s So, total energy produced in 15 min=…

Q: How much heat is absorbed by a persons hand if 100 grams of liquid water at 100°C is poured on his…

A:

Q: In a certain solar house, energy from the Sun is stored in barrels filled with water. In a…

A:

Q: The basal metabolic rate is the rate at which energy is produced in the body when a person is at…

A:

Q: If her body retains 10 J of thermal energy for each joule of work done while lifting, how many times…

A: Data Given , Mass of the women ( mw ) = 47 kg Mass of the barbell ( mb ) = 20 kg Height ( h ) = 0.80…

Human Metabolism

Being described as the most complicated machine ever encountered by humans, the human body and the cell metabolism is nothing less than a wonder. Metabolism is the set of life-sustaining chemical reactions within organisms.