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

Q: A object weighing 33 kg goes up a 7 meter hill. If 231 J of thermal energy ar created how fast was…

A: Given, Mass, m=33kg Height, h=7m According to the conservation of energy,   12mv2=mgh+231

Q: An electric-powered snow-thrower machine throws snowballs 0.2 kg each at a speed of 9 m/s. The…

A:

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

A:

Q: A heat engine converts 144.0 kcal from a supply of 352.0 kcal into work. How much mechanical work…

A:

Q: Question 8 30 kg Michaela is swinging on a swing. Her total mechanical energy is 600 J. At what…

A:

Q: A pitching machine uses 122J of energy to throw a baseball with a mass of 0.145kg at a speed of…

A: The given data are: Win=122 Jm=0.145 kgv==36 m/st=0.4 s Here, Win denotes the input energy, m…

Q: An electric kettle uses 240 000 J of input energy and produces only 190 000 J of useful energy.…

A:

Q: A power plant has a power output of 1285 MWand operates with an efficiency of 32.4 percent. Excess…

A:

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: The third floor of a apartment is 9.4 meters above street level. How much work is needed to move a…

A:

Q: 600 J of heat energy are transferred to a system that does 400 J of work. By how much does the…

A:

Q: Problem 2) An electric lawn mower runs on 1000 watts of electrical power input. The same mower can…

A: Given data:  Power (P) = 1000 W Time (t) = 20 minutes = 1200 seconds Energy required (Eout) =…

Q: The total consumption of electrical energy in the United States is about 1.37 x 10¹9 joules per…

A: Total consumption of the electrical energy

Q: 1. a) A conventional photovoltaic cell delivers 4.0x10a W of electric energy when illuminated with…

A: Output power by cell = 4.0 × 10-3 W  Input power = 1.2 × 10-1 W

Q: A weight lifter lifts a 380-N set of weights from ground level to a position over his head, a…

A:

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…

A:

Q: A 68 kg hiker walks at 5.0 km/h up a 8 % slope. The indicated incline is the ratio of the vertical…

A: We are given power needed to walk on level road. We then find the power needed to raise the body by…

Q: When a certain type of coal is burned at a power plant, 22.6 ×106×106 joules per kilogram are…

A:

Q: Problem 1: Suppose a man does 35.5 kJ of work with an efficiency of 4.95 %. How much food energy, in…

A: Given Data, Work Done by the man (W)=35.5 kJ Efficiencyη=4.95 %

Q: 3.5x10^7 J of heat transfers into an engine. If 2.1x10^7 J of work is performed what is the…

A:

Q: A cow is being lifted to the top of a cliff. The cow has a mass of 450 kg and the height of the…

A: The potential energy required to lift the mass m at height h is given by,  PE=mgh Given : Mass m=450…

Q: The average electricity consumption of a house in Gainesville is known to be 1,007 kWh in a month…

A: As the monthly energy consumption is 1007 kWh therefore the daily energy consumption of Gainesville…

Q: A pitching machine uses 122J of energy to throw a baseball with a mass of 0.145kg at a speed of 36.0…

A: Power is ratio of energy divided by time.  P=Et Power is measured in watt.

Q: Geothermal energy uses the subsurface level of the earth to heat up water converting it to steam and…

A:

Q: A heat engine absorbs 1000 Joules heat from the hot source and releases 400 Joules to the cold…

A: The amount of work is done by the heat engine can be derived from thermodynamic first law.…

Newton's First Law of Motion

If a very smooth ball is rolled down an inclined surface with zero friction, the ball will continue to roll indefinitely for an infinite time, in an attempt to reach to the same height on the opposite hill!