Suppose a 10.00-kg mass drops through a height difference of 3.00 m, and the resulting work is used to turn a paddle in 200.0 g water, initially at 15.00°C. The final water temperature is found to be 15.35°C. Assuming that the work done is used entirely to increase the water temperature, calculate the conversion factor between joules and calories.

Q: 1.00 mol of an ideal gas is compressed isobarically from a volume of 40.0 L to a volume of 30.0 L at…

A: For an ideal gas Work done = PdV Given is a isobaric process hense P is constant wrt. volume. So W=…

Q: )How long in minutes will the energy in a 904 k) (216 kcal) cup of yogurt last in a woman doing work…

A: Given: The energy is 904 kJ.             The power is 125 W.             The efficiency is 20.0%.…

Q: In a steam generator, a 4.7 m3 of water enters at a velocity 15m/s , 750 kpa and Internal energy of…

A:

Q: Suppose a woman does 450 J of work and 9300 J of heat transfer occurs into the environment in the…

A: Workdone by the women is W = 450 J Amount of heat transfer is Q = -9300 J (As heat is going out of…

Q: Suppose a woman does 500 ) of work and 9500 J of heat transfer occurs into the environment in the…

A:

Q: Determine in which case is heat added to the system? (a) ΔU = –43 J, w = 40 J; or (b) ΔU = 31 J, w =…

A:

Q: A coal- burning steam locomotive heats steam to 180°C and exhausts it at 100°C. During 1 s of its…

A: Refer Table “Heat engine efficiencies. Typical input and exhaust temperatures, ideal (best possible)…

Q: A piston-cylinder assembly contains 0.7 lb of air initially at a pressure of 30 lbf/in² and a…

A: Given: Let us consider the given data, Air's mass, m=0.7 lb Initial pressure, P1=30 lbfin2 Final…

Q: In an Isobaric process ( P =  2.0x105 Pa), increasing the temperature of 10.0 g of  liquid water by…

A: P =  2.0x105 Pa temperature =15oC mass = 10 g change in volume = 1.0 x 10-8m3

Q: Consider an adiabatic humidification system shown below. The humidifying efficiency is E = 0.8, the…

A: In this question we use :                                   Vca=mcaRTcaPcaR = gas…

Q: Air (ρ = 1.26 kg/m3 ) enters a compressor at a rate of 8.50 m3 /min and a pressure of 101.325 kPa,…

A: Given, ρ = 1.26 kg/m3 compressor at a rate of 8.50 m3 /min  pressure 618 kPa

Q: How much internal energy in Joule is generated when a (1.67x10^1)-g lead bullet, traveling at…

A: Mass of bullet "m " = 1.67×10^¹ g  Velocity of bullet "v"= 4.9×10^² m/ s .

Q: How much metabolic energy should a 200 g bird expend when flying 20 meters? Ignore friction losses,…

A: mass = 200 g acceleration = 1 kg / 1000 g distance = 20 meter

Q: A pearl diver fills his lungs with 5.25 LL of air at normal atmospheric pressure and then dives to…

A: Initial volume, V1 = 5.25 L => V1 = 5.25*10-3 m3 Initial pressure, P1 = 1 atm => P1 = 101325…

Q: A system does 2.00 x 10° ) of work while 6.20 x 10 ) of heat transfer occurs to the environment.…

A: Given : Work done by the system (W) = 2 x 108 J Heat transfer to the environment (Q) = -6.2 x 108 J…

Q: The efficiency of a muscle during weight lifting is equal to the work done in lifting the weight…

A: efficiency of a muscle during weight lifting is equal to the work done in lifting the weight divided…

Q: A 75 kg person cannot go out for a long time due to Covid-19 restrictions. That's why he rides a…

A: 80%Eelectric =Eheat              0.80Pt=mLv                       m=0.80PtLv

Q: (a) When the steam engine is running between 120°C and 30°C, how many Js of calories are there in…

A: Given data

Q: An ideal heat pump does 400 J of work to keep the temperature in a dorm room at 20◦ C by dumping…

A:

Q: If the plant operates at 50.0% of its maximum efficiency and its power output is 1.23 × 108 W, at…

A: The given data are: TH=540 KTL=313 KQH=1.23×108 W Here, TH is the higher temperature, TL is the…

Q: A power plant taps steam superheated by geothermal energy to 558 K (the temperature of the hot…

A: Given data: Temperature of hot reservoir, Th=558 K Temperature of cold reservoir, Tc=305 K Output…

Q: In rural housing, the source of water is obtained through groundwater pumped up. Assume that the…

A: We are supposed to find the input power required to lift water. Power is defined as work done per…

Q: A 53-kg mountain climber, starting from rest, climbs a vertical distance of 764 m. At the top, she…

A:

Q: An ideal gas in a container exerts a pressure of 100Pa while its volume increases by 0.2m^3. Its…

A:

Q: A 0.28 m3 insulated piston-cylinder device initially contains 0.80 kg of air at 18.8°C. At this…

A: Determining Pressure using ideal gas relation:P=m1RT1V1where, m1=0.8 kgR=0.287…

Q: A lab rat lifts a 200 g mass 1.55 m high as it spins on a Ferris wheel. At the same time, it loses…

A:

Q: One mole of an ideal gas is kept in a container at an initial pressure of 2 kPa and temperature . It…

A: The first law of thermodynamics is just energy conservation law for thermodynamical process. It says…

Q: (10° N/m®) 2.6 A 2.0 1.0 D 0.6 1.0 4.0 V (10°m²) B.

A: Solution:

Q: A 60 kg woman cheats on her diet and eats a 493 Calorie (493 kcal) jelly donut for breakfast. (a)…

A:

Q: A heat pump is used to heat a house in the winter and then reversed to cool the house in the summer.…

A:

Q: A steam engine takes heat from steam at 221 °C to do work. If the surrounding air at 25 °C is…

A:

Q: engine

A: Efficiency for a Carnot engine is given by the following formula. η=1-T2T1orη=WQ1 where T1 and T2…

Q: It is important for the body to be able to cool itself even during moderate exercise. Suppose a 70kg…

A:

Q: LA 75 kg person cannot go out for a long time due to Covid-19 restrictions. That's why he rides a…

A:

Q: Refrigerant 134a expands in a piston-cylinder assembly from p; a 200 lb/in? and T₁-140°F to p2-30…

A:

Q: If you have to climb eight stories at a height of 24 m above ground level. Then the extra calories…

A:

First law of Thermodynamics

The word thermodynamics consists of two words: thermo- and dynamics. Dynamics means the study of motion. The field of thermodynamics is all about the study of the movement of heat. In a more meaningful way, it is stated as the study of the transfer of energy. Energy transfer is something that we encounter in day-to-day life. Automobiles, chemical reactions, refrigerators, and power generators work on the basis of thermodynamic principles.