A weightlifter curls a 26 kg bar, raising it each time a distance of 0.65 m . How many times must he repeat this exercise to burn off the energy in one slice of pizza?  Assume 25% efficiency. Energy content of one slice of pizza is 1260  kJ

Q: The Kingda Ka roller coaster at Six Flags Great Adventure and Safari in New Jersey currently holds…

A:

Q: The total mass of a paratrooper - the person and all the gear - is 118kg. the paratrooper jumps out…

A:

Q: a) Find the change in the mechanical energy (potential + kinetic) of the block from the top to the…

A:

Q: A machinist polishes a 0.50-kg copper fitting with a piece of emery cloth for 2.0 min. He moves the…

A:

Q: A 3.50 kg block of ice slides down a ramp. The block starts at the top of the ramp from rest, and…

A:

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

A:

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

A:

Q: work done on the copper bar

A:

Q: A weight lifter bench‑presses a 150.0 kg barbell from his chest to a height equal the length of his…

A: Solution:   Given Values, Mass of barbell (m)=150 KgHeight (h)=0.850 m

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: What is the change in internal energy of a car if you put 12.0 gal of gasoline into its tank? The…

A:

Q: A weightlifter curls a 35 kg bar, raising it each time a distance of 0.60 m. How many times must he…

A: A slice of pizza contains 1260 J. A fraction of this energy can be used as work and the remaining is…

Q: A worker drives a 0.500 kg spike into a rail tie with a 2.50 kg sledgehammer. The hammer hits the…

A: The concepts used to solve this problem are kinetic energy and internal energy. Initially, use the…

Q: An insulated container is filled with a mixture of water and ice at zero °C. An electric heating…

A: Answer            2130 J is the increase in the internal energy of the ice-water system Solution…

Q: A simple pendulum is suspended from the ceiling by means of a string and this time, the pendulum is…

A:

Q: When you put on the brakes on your bicycle, friction heats the steel rims of your wheels. Could this…

A:

Q: When you skid to a stop on your bike, you can significantly heat the small patch of tire that rubs…

A: As mentioned in the question statement, the expression for the normal reaction and bike and rider…

Q: A 32% efficient electric power plant produces 900 MJ of electric energy per second and discharges…

A:

Q: A typical coal-fired power plant burns 340 metric tons of coal every hour to generate 2.5 × 106 MJ…

A: The efficiency of the power plant can be given by e=WoutQh×100%

Q: When one gallon of gasoline is burned in a car engine, 1.19 x 108 J of internal energy is released.…

A: given, When one gallon of gasoline is burned in a car engine, 1.19 x 108 J of internal energy is…

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

A:

Q: Ball shot into sand. A steel ball with mass m = 5.2 g is fired vertically downward from a height h,…

A: Given data: The mass, m =5.2 g=0.0052 kg The height h1=18 m The initial speed is v0=14 m/s The…

Q: You push a 33-kg table across a 6.2-m-wide room. In the process, 1.5 kJ of mechanical energy gets…

A: the expression for mechanical energy is

Q: A sleeping 68 kg man has a metabolic power of 75 W . How many Calories does he burn during an 8.0…

A:

Q: A foam cup is filled with hot water and allowed to cool while being stirred by a paddlewheel.…

A: In the given question, We have to determine the change in internal energy of the water