During a workout, a person repeatedly lifts a 16-lb barbell through a distance of 1.6 ft. How many "reps" of this lift are required to work off 150 C?

Q: During a workout, a person repeatedly lifts a 16-lb bar- bell through a distance of 1.1 ft. How many…

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Q: Please help! Thank you! A 68.4-kg sky diver jumped out of an airplane at an altitude of 0.900 km.…

A: Given Data : The mass of the skydiver is given as m = 68.4 Kg. The height of the skydiver initially…

Q: A heat engine receives 500 j of heat from its combustion process and loses 391 J through the exhaust…

A: Given data:  Heat input (Qin) = 500 J Heat loss = 391 J Required: The efficiency of heat engine

Q: A 2000kg car is advertised that it can go from rest to 30m/s, drives 100km, and 3000m in height on 1…

A: Part (a): The 1 gram of gasoline gives 5×104 J of heat energy. Hence, the total heat energy (Q)…

Q: 1.An electric kettle transfers 900 000 J of energy to some water in 10 minutes. (a) Estimate the…

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Q: How much energy would you consume daily if you kept a lightbulb of 20 watts on all day long?

A: A lightbulb is rated as 20 Watt which is indicating the power of the bulb.  P = E/t  Power is…

Q: What is the change in internal energy of a system that takes in 2.83 106 J of heat, and does 4.50…

A: Given that  Work done by the system (W) = 4.50×105J Heat transfer into the system is (Q1) = 2.83…

Q: A heat engine has a solar collector receiving 600 Btu/h per square foot, inside which a transfer…

A: Transfer medium is heated to 800R and  collected energy power heat is 100F engine deliver heat 8500.…

Q: gasoline engine is running, an amount of gasoline containing 11,700 J of chemical potential energy…

A: Efficiency =W/Q

Q: As a gasoline engine is running, an amount of gasoline containing 16,000 J of chemical potential…

A: The work done by the engine, W=4000 J   The input chemical energy, Einput=16000 J

Q: A neutron collides elastically with a helium nucleus (at rest initially) whose mass is four times…

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Q: Rocky spends all the afternoon hours watching sports on cable TV. In the process, he does 1118 J of…

A: Rocky spends all the afternoon hours watching sports on cable TV. In the process, he does 1118 J of…

Q: A student evaluates a weight loss program by calculating the number of times she would need to climb…

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Q: We heat water in a pool with dimensions 10 × 5.0 × 2.0 m3 with a heater so that the temperature is…

A: Given data V=100 m3T1=10 KT2=0.005 Kt=5 min

Q: Give an explanation of how food energy (calories) can be viewed as molecular potential energy…

A: Given: Food energy can be viewed as molecular potential energy is discussed below.

Q: An engine doing work isothermally takes in 10kJ and exahusts 1kJ. What is the efficiency of the…

A: Heat takes the engine,                               Heat exhausts the engine,…

Q: crate of fruit with a mass of 32.0 kg and a specific heat capacity of 3650 J/(kg⋅K) slides 8.80 mm…

A: According to work energy theorem Work done by net force = change in kinetic energy

Q: A weightlifter curls a 28 kg bar, raising it each time a distance of 0.55 m.  How many times must…

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Q: 126 J of heat are extracted from the inside of a fridge. If its COP is 4, how much heat in joules…

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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 sealed container containing water with stirring wings inside is heating up on the stove. In this…

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Q: A soft drink manufacturer clains that a new diet drink is "low Joule." The label indicates the…

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Q: A steam engine delivers 5.4×108 J of work per minute and services 3.6×109J of heat per minute from…

A: Given :W= 5.4 x 108JH= 3.6 x 109J

Q: Convert 7.87 x 103 cal to the equivalent number of kilocalories (also known as Calories, used to…

A: Consider the conversion formula as given below. 1 kcal=103 cal 1 cal=4.184 J

Q: work done on the copper bar

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Q: A3.5 kg mass is sliding across a horizontal table at an initial speed of 6.8 m/s before friction…

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Q: As a gasoline engine is running, an amount of gasoline containing 11,100 J of chemical potential…

A: Given Data: The input energy is: Qi=11100 J The output energy is: Qo=3700 J

Q: he metabolic power for typing is 150 W for Lili, not a lot as you know probably. How long does it…

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Q: If I add 37,483 J of energy to an ideal gas inside a balloon, causing the internal energy to…

A: Given data The heat added inside the balloon is given as ∆Q=37483 J. The increase in internal…

Q: A gas is compressed inside a cylinder. An average force of 27 N acts to move the piston 2.5 m.…

A: Average force = 27 N  Distance moved = 2.5 m  Heat conducted away from gas = 8 Joules

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

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Q: A 150 Hb.- ball initially on the top of a 20ft ladder is d ropped and hits the ground.With re…

A: Given : Mass of ball = 150 lb Initial Velocity of ball = 0 ft/s Initial height of ball =  20 ft

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(n) 88-kg sprinter accelerates from rest to a speed of 11.0 m/s in 4.2 s. (a) Calculate the…

A: Given that, Mass of the sprinter is m = 88 kg. The sprinter accelerates from rest thus initial…

Q: 600 J of work are done on a system in a process that decreases the system's thermal energy by 400 J.…

A: Given that : 600 J of work are done on a system in a process that decreases the thermal energy by…

Q: how much energy required to melt 5 g of ice if you know that the potential heat of melting ice is…

A: Given data:  Mass of ice (m) = 5 g = 0.005 kg Potential heat of melting ice (Lice ) = 354000 J/kg

Q: Suppose you spend 30.0 minutes on a stairclimbing machine, climbing at a rate of 90.0 steps per…

A: The efficiency of the machine is

Q: A hot water heater in a residential home runs for an average of 3.2 hours per day with a heat energy…

A: Given Data:- The number of hours per day that the heater runs: 3.2 h/day=3.2×3600 s/dayThe energy…

Q: A heat engine extracts 45.0 kJ from the hot reservoir and exhausts 40.0 kJ into the cold reservoir.…

A: The work done by heat engine: W=QH-QC Efficiency η=1-QCQH Given QC=40kJ QH=45kJ

Q: Why do we not use brakes with more than 80% efficiency in automobiles? What should be the minimum…

A: we do not use brakes with more than 80% efficiency in automobiles

Q: A heat engine extracts 59 kJkJ from the hot reservoir and exhausts 32 kJkJ into the cold reservoir.…

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Q: As a gasoline engine is running, an amount of gasoline containing 13,600 J of chemical potential…

A: Given: Input energy, E=13600 J Work done, W=3400 J

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

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Q: A weightlifter curls a 26 kg bar, raising it each time a distance of 0.65 m . How many times must he…

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Calorimetry

Measuring the heat transferred during chemical reactions or other physical processes is known as calorimetry. It comes under the branch of thermochemistry.