A 68-kg woman is planning to bicycle for an hour. If she is to meet her entire energy needs while bicycling by eating 30-g chocolate candy bars, determine how many candy bars she needs to take with her.

Q: For how long would a 68 kg athlete have to swim at a fast crawl to use all the energy available in a…

A:

Q: The label on a candy bar says 400 Calories. Assuming a typical efficiency for energy use by the…

A: Let us consider that the efficiency of the body for energy use is 25%. The energy of the candy bar…

Q: How long does a 65 kg adult need to walk at a rate of 5 km/h in order to burn off all the energy in…

A: Given Metabolic power for walking at  5 km/h is W=380 W Each slice of pizza contains energy of…

Q: An 68.0-kg man eats a banana of energy content 436 kJ (104 kcal). If all of the energy from the…

A:

Q: A small 142 gram (0.142 kg) pinewood derby car sits at the top of a 1.20 meter high sloped…

A: SOlution: Given that m = 0.142 kg h = 1.2 m energy loss = 5% of its energy

Q: . Angelito wanted to lose weight by dieting and exercising. One day, he had only a loaf of bread…

A: As per the answering guidelines we will solve the first part only. Please upload the other problems…

Q: A 1,100 kg horse is walking at 3.0 m/s. How much energy does the horse have?

A: 1,100 kg horse is walking at 3.0 m/s. How much energy does the horse have?

Q: What is the net energy expenditure of a 75kg male running a 5km race on a track in 20 mins?

A: Here given a male of 75 kg running a 5 km race on a track in 20 min. We have to calculate the net…

Q: How much work is done to expand a 10-cm diameter cylindrical chamber at 1 atm from a length of 10 cm…

A: Hence, the work done is 79.58 J

Q: 23. How much work is required to fill the tank in Figure 9.5.5 with water from ground level? +8…

A:

Q: The box of a well-known breakfast cereal states that one ounce of the cereal contains 103 Calories…

A: The unit of energy can be converted from kilocalories to joule by multiplying with 4186 .   The…

Q: A 68 kg hiker walks at 5.0 km/h up a 7% slope. What is the necessary metabolic power?

A:

Q: Suppose a woman eats a 340 kcal cup of yogurt. How many minutes will the energy in the cup of yogurt…

A: The equation for the available energy or the output energy.

Q: A light bulb has 75% efficiency. How much energy is wasted if the useful output energy of the bulb…

A: Given data: Efficiency η=75% The output energy of the bulb =24J

Q: How long in minutes will the energy in an 862 kJ (206 kcal) cup of yogurt last in a woman doing work…

A: Given Data: The energy stored in Yogurt is, E=862 kJ The power is, P=110 W The efficiency of a woman…

Q: At room temperature, an oxygen molecule, with mass of 5.31x10^-26 kg typically has a kinetic energy…

A: The expression for find velocity of oxygen molecule is KE=12mv2v=2KEm

Q: A crane lifts a 320 kg crate up a height of 6.5 m. What type of energy changes occur?

A: Write the given values with the suitable variables. m=320 kgh=6.5 m Here, m is the mass and h is the…

Q: A 28-kilogram child slides down a playground slide from a height of 3.0 m above the bottom of the…

A: Given data: Mass (m) = 28 kg Height (h) = 3.0 m Initial speed (v0) = 0 m/s Final speed at bottom (v)…

Q: A(n) 80.0-kg student eats a 160-Calorie doughnut. To burn-it-off, he decides to climb the steps of a…

A: Work done is equal to product of force and displacement and work done is stored in the form of…

Q: The Potential energy in KJ when 2500 Kg mass rest at a level of 50 m above the ground.

A:

Q: I drop a 60 g golf ball from 2m high. It rebounds to 1.5m. How much energy is lost?

A: Given that  mass m 60 g height h 2m Question? How much energy is lost?

Q: While running, a person dissipates about 0.60 J ofmechanical energy per step per kilogram of body…

A:

Q: How many sprints from rest to a speed of 5.0 m/s would a 65-kg man have to complete to burn off 5.0…

A: Given The intial velocity of a man is u=0. The final velocity of a man is v=5 m/s. The mass of the…

Q: A 65-kg indoor rock climber eats an energy bar that has 500 kilocalories to fuel an afternoon of…

A:

Q: Gasoline yields 4.8 x 107 joules per kg when burned. The density of gasoline is approximately the…

A: From the given information, the car use 4 gallons of gasoline for 100 miles trip.

Q: A weightlifter curls a 30 kg bar, raising it each time a distance of 0.60 m. How many times must he…

A: Imagine a slice of pizza contains 1200 kJ of chemical energy stored. A standard efficiency of human…

Q: An “energy bar” contains 22 g of carbohydrates. If the energy bar was his only fuel, how far could a…

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 3.5 kg rock is at the top of a 37 m cliff. How much energy does the rock have? Your answer: O 130J…

A:

Q: If a person who normally requires an average of 12,000 kJ (3000 kcal) of food energy per day…

A: The extra energy needed to be worked off  E = 1000 kJ…

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

A:

Q: How many metres can a man weighing 60 kg climb by using the energy from a slice of bread which…

A: Given:  mass, m = 60 kg  Energy, E = 100000 calories efficiency = 28 %

Q: How much energy would you consume daily if you kept 3 lightbulbs of 25 watts on all day long?.

A: Power consumed by 1 bulb, p=25W Total power consumed by 3 bulbs=P=3p=75W 1 day, t=86400Seconds. so…

Q: How much energy does it take to drive a 200 Hp car at 20 % power for 3 hours if it is 12 %…

A: Given Power rating of car = 200 Hp = 200 × 746 W Output run power is only 20% of rated power time =…

Q: A 2000 Kg car is moving at 54 km/hr behind a truck. In order to pass the track, the car changes its…

A: Given:  mass of car, m = 2000 kg  initial velocity, u = 54 km/h = 15 m/s final velocity, v = 72 km/h…

Q: A girl weighing 470 N, holds suspended on the end of a rope 8 meters long. What will be her gain in…

A: Given data: The weight of the girl, W=470 N. The length of the rope, l=8 m. The angle made by the…

Q: How much work is required to lift a 300-kgkg refrigerator to the second-story level?

A:

Q: how much work is required to lift a 3.00kg object from a well 10.0 m deep?

A: The relation between work and displacement(height) is given by, W=Fd..............(1) where, F=force…

Q: 8) A person consumes a snack containing 14 food calories (14 kcal). What is the power this food…

A: We have a food that is consumed containing an energy of E=14 cal=14×4.186=58.604 J which is to be…

Q: A book on a 3 meter high shelf has 17 joules of potential energy.what is the mass of the book 30kg…

A:

Q: The United States Patent and Trademark Office rejects claims for perpetual motion machines (in which…

A: According to the first law of thermodynamics, part of heat supplied to a system is used for…

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.