Friction is the reason that machines are not 100% efficient. Some of the work gets lost when mechanical energy is transformed into thermal energy.  Sometimes when driving down a windy mountain road, you can start to smell the brake pads. Explain what might be going on there:

Q: Why do we work at a temperature of 25°C. What happens if we increase the temperature

A: 25 Deg C is the Standard reference Ambient temperature

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: Which of the following statements is an accurate way to summarize the first law of thermodynamics?…

A: Given are few statements  We have to find out which statement summarizes the first law of…

Q: Four operations in a manufacturing process represented as blocks are linked as shown. Each operation…

A:

Q: Choose the number that corresponds the following questions and statements.   Which of the below is…

A:

Q: The Subject is Thermodynamics 1 1. Describe Ideal Gas and the Laws associated with it.

A: Ideal gas is a hypothetical gas composed of molecules which follow certain conditions  This law…

Q: Which of the following thermodynamic processes most likely describes process B to A? * PA A В PB D…

A: An Isobaric process is a thermodynamic process at constant pressure. If the gas is  expand at a…

Q: Four operations in a manufacturing process represented as blocks are linked as shown. Each operation…

A:

Q: A 46-kg woman cheats on her diet and eats a 685-Calorie (685 kcal) jelly doughnut for breakfast.…

A:

Q: A calorimeter is used to measure the energy released when a new exotic rocket fuel and oxidizer are…

A:

Q: Your last exam is done and you have a two week break before the next semester starts. You look…

A: Given situation:You clean the room and create order from disorder.Question:Are you violating the 2nd…

Q: According to their website, a single Wawa Italian Hoagie contains 450 food calories. Refer to…

A: It is given that,

Q: 4. a. A weightlifter curls a 100 kg bar, raising it each time a distance of 0.61 m. How many times…

A:

Q: The U.S. Department of Energy estimates that up to 10 percent of the energy use of a house can be…

A: Annual energy cost,

Q: A book falls from a table. Suppose some of the thermal energy within the book is spontaneously…

A: Suppose some of the thermal energy within the book is spontaneously converted into kinetic energy…

Q: Which of the following thermodynamic processes most likely describes process A to D? * PA A В PB- D!

A: From A to D thermodynamic process happen at constant Volume and pressure is decreasing

Q: Which of the following thermodynamic processes most likely describes process A to B? * PA A D + 2 4…

A: Isothermal Process: The temperature of the system remains constant throughout an isothermal process.…

Q: A PHYS 1510 student was working on a robotics project. The joints on the machine they were building…

A:

Q: 1 K calorie is approximately equal to: a. 41.86 J b. 418.6 J c. 4.186 J

A: Required : 1 K cal in joules.

Q: 42. Which of the following processes is a representative of the second law of thermodynamics: (a) If…

A: Solution:-

Q: 9. A physics student decides to “burn off” some Calories by climbing a ladder. As the ladder is…

A: Part (a) Given data: The mass of the student is m=75 kg. The calories to burn off is E=1 Calorie…

Q: A pronghorn antelope can run at a remarkable 18 m/sm/s for up to 10 minutes, almost triple the speed…

A: mass (m) = 32 kg speed (v) = 18 m/s Power = 3.4 kW = 3400 Wtime = 10 minutes

Q: 1. Kurdapya, a grade 12 STEM student is helping her sister solve this problem. How fast is an oxygen…

A: Disclaimer: “Since you have asked multiple question, we will solve the first question for you. If…

Q: A 1,500 kg car traveling at 13.4 m/s (30 mph) applies its breaks and comes to rest in 5.5 seconds.…

A:

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

A:

Q: (a) How many joules of energy are the equivalent of one jelly doughnut? (b) How many stairs must the…

A: The weight of the woman is w=58 kg. The woman eats 555 kcal.

Q: At least how many Calories does a mountain climber need in order to climb from sea level to the top…

A: h = 5600 mm = 84.4 kg effiicency percentage = 14 %

Q: An ideal gas is compressed in a well-insulated chamber using a well-insulated piston. This process…

A:

Q: Suppose you are in a forest and a lion attacks you, and you have to climb a tree, what is the height…

A: h =height of tree

Q: A 46-kg woman cheats on her diet and eats a 555-Calorie (555 kcal) jelly doughnut for breaktast. (a)…

A: In this question it is given that a woman with weight 46 kg  is on dieting she cheats her diet and…

Q: With respect to orderly and disorderly states, what do natural systems tend to do? Can a disorderly…

A: When the cup is in the waiter's hand, it had some order in it, the whole cup, and the tea in it and…

Q: Q1.2. For each of the statements below, state if it is true (T) or false (F): 1) The second law of…

A:

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

A:

Q: . If an incandescent light bulb requires 100 units of potential energy to deliver only about 15…

A: Given , Bulb require 100 unit of potential energy to deliver only 15 units of kinetic energy ( in…

Q: An electric generator at a power plant produces energy by passing superheated steam from a high…

A: Given data: The high-temperature steam has a temperature of, Th=376 K  The low-temperature reservoir…

Q: A car, initially traveling at a high speed, crashes into a wall. After the crash, the car comes to…

A: car crashed into the wall

Q: Assume that geothermal heat transfer (at least near the surface of the earth) is by conduction…

A: Given:Average geothermal heat flow,P/A= 0.087 W/m2Thermal gradient ,∆TL=100 °C/kmFind the thermal…

Q: 17. The first law of thermodynamics for an ideal gas may be stated in the form AU = AQ + AW Which of…

A: Given data, First law of thermodynamics is given :- ∆U=∆Q+∆W

Q: For most automobiles, the number of miles per gallon decreases as highway speed increases. Fuel…

A: Kinetic energy can be expressed as

Q: What is the highest possible efficiency of a heat engine working between a high temperature…

A: Given TH=600℃ = 873K TC=20℃ = 293K we have to find efficiency Efficiency η = 1- (TC÷TH)

Q: 2. Suppose that you want to increase the efficiency of an two temperatures, Tlow and Thigh. You have…

A: Solution      Given dataIn heat engine Temperature of source reservoir THTemperature of sink…

Q: To raise the temperature of a certain mass of gas by 50°C at a constant pressure, 160 calories of…

A: Given data- For Cp ∆T=500 Q =160 calories For Cv ∆T=1000 Q=240 calories

Q: With 2.56 × 10^6 J of heat transfer into an engine, it performs only 1.50 × 10^5 J of work. (a) What…

A: Given data:  Heat transfer into the engine QH = 2.56×106 J Work done (W) = 1.50×105 J Required: The…

Q: The urban heat island effect is often strongest at night when temperatures would typically drop.…

A: The urban heat island effect is often strongest at night when temperatures would typically drop.…