A typical coal-fired power plant burns 350 metric tons of coal every hour to generate 2.6x106 MJ of electricity. 1 metric ton = 1000 kg; 1 metric ton of coal has a volume of 1.5 m³. The heat of combustion is 28 MJ/kg. Assume that all heat is transferred from the fuel to the boiler and that all the work done in spinning the turbine is transformed into electrical energy. Correct Correct answer is shown. Your answer 88.11 m was either rounded different different number of significant figures than required for this part. Part B What is the power plant's thermal efficiency? Express your answer as a percentage. VE ΑΣΦ e = ? %

Problem Power Output. In each case, find your average power in watts. Assume that riding a bike burns 100 Calories per mile. If you ride at a speed of 20 miles per hour, what is your average power output, in watts?

5. How many Joules of energy is in one kilowatt hour? Our classroom has about 20 lights, each with 50 W power rating. How many hours could a generator operating at 100% efficiency supply this power from one gallon of gasoline? If the generator operated at a realistic efficiency of 20%?

A 400 kg satellite is in a circular orbit at an altitude of 425 km above the Earth's surface. Because of air friction, the satellite eventually falls to the Earth's surface, where it hits the ground with a speed of 1.80 km/s. How much energy was transformed into internal energy by means of air friction? Need Help? Read It

A gasoline engine tansforms approximately 34 percent of the fuel’s chemical energy into mechanical energy. If energy is conserved, what happens to the other 66 percent? A. It is transformed in to thermal energy.B. It is transformed into electrical energy.C. It is lost due to friction between moving parts.D. Some is transformed into electrical energy; some is released as heat.

E2:: need help. This is all the information I was given. If I needed I would look it up online

bacon-cheddar-double-burger meal along with A 65.0-kg mountain climber just ate a Johnny Rocket's two peanut butter milkshakes, which have 5810 Calories (5810 kilocalories). Assume she can convert these calories into energy with 100% efficiency and use the fact that 1 kcal = 4186 J. Calculate how many times she could climb up Mt. Everest - the world's tallest mountain. The height of Mt. Everest is 8840 m.

Geothermal energy uses the subsurface level of the earth to heat up water converting it to steam and then using the steam to turn a turbine attached to a generator to generate electric energy. If the geothermal energy conversion process is 46% efficient and there was 789 J of electricity produced, how much energy did the steam have before reaching the turbine? answer 1715 eff=output/inputx 100

Wind and solar power are both considered renewable sources of energy. Although they are not as widespread as fossil fuel generators, they are slowly gaining popularity worldwide. a) How does a wind turbine generate electricity? b) How does a solar cell generate electricity? c) What common disadvantage do these two methods share? d) If you had to choose between installing equivalent capacity solar cells or wind generators at your home, which one would you install? Justify your answer IU

What is the work done by a 300-watt electric grinder in 5 minutes? 90 J 0 1 kJ O 90 kJ 01J