If a source of energy such as a solar power plant provides 1 gigawatt of power, many joules is that in a day?     109     86400 J     1012     8.64×1013 J

what is the kinetic energy of a car with the mass of 1,736 kg if its traveling at 7.26 m/s? answer in exponential form.

Suppose that in one year a country produces 2.77 × 10'' kilowatt-hours (kWh) of electrical energy from 4148 hydroelectric plants (1.00 kWh = 3.60 × 10° J). On average, each plant is 90.0% efficient at converting mechanical energy to electrical energy, and the average dam height is 50.0 m. At 2.77 x 10!1 kWh of electrical energy produced in one year, what is the average power output Payg per Pavg W %3D hydroelectric plant? What total mass of water m flowed over the dams during that year? m = kg What was the average mass of water mavg per dam that provided the mechanical energy to generate the electricity? mavg kg What was the average volume of water Vavg per dam that provided the mechanical energy to generate the electricity? (The density of water is 1000 kg/m³.) Vavg m %3D A gallon of gasoline contains 4.50 × 10' J of energy. How many gallons n of gasoline did the 4148 dams save? n = gal MacRook Pro

A water fountain uses 125 Watts of power each hour. It is run 24 hours each day for 7 days. If electricity costs 10 cents per Kilowatt-hour, how much does it cost to keep the fountain working for those 7 days? Put your answer in $##.## form, but without the money symbol ($).

Under normal conditions the human heart converts about 12.7 J of chemical energy per second into 1.27 W of mechanical power as it pumps blood throughout the body HINT (a) Determine the number of Calories required to power the heart for one day, given that 1 Calorie equals 4186 J. Cal (b) Metabolizing 1 kg of fat can release about 9000 Calories of energy. What mass of metabolized fat (in kg) would power the heart for one day? kg Need Help? Watch it Read It

Meteor Crater. About 50,000 years ago, a meteor crashed into the earth near present-day Flagstaff, Arizona. Measurements from 2005 estimate that this meteor had a mass of about kg (around 150,000 tons) and hit the ground at a speed of (a) How much kinetic energy did this meteor deliver to the ground? (b) How does this energy compare to the energy released by a 1.0-megaton nuclear bomb? (A megaton bomb releases the same amount of energy as a million tons of TNT, and 1.0 ton of TNT releases J of energy.

If you have a ball with a mass of 6.00kg, that has an initial velocity of vA=(2.00i + 5.00j)m/s and a final velocity of vB=(-2.00i + 8.00j)m/s, What is the Work done on the ball if the work only changes the kinetic energy?   a. 234 Joules   b. 117 Joules   c. 93 Joules   d. -13 Joules   e. 95 Joules

How many times could a 70kg person jump rope with the energy contained in one serving of gummy bears? There are 130 calories per serving of gummy bears. Assume the gummy bear energy is converted completely to potential energy and that each jump is 10.0cm high. Calculate the potential energy per jump using PE = mgh where m is the mass of the person in kilograms, g is the gravitational acceleration constant 9.8m/s^2, and h is the height of each jump in meters. Recall that 1 Joule = 1kgm^2/s^2.

The energy efficiency of electric vehicles is usually rated in terms of the​ kilowatt-hours (of​ energy) required to drive 100​ miles, or​ kWh/100 mi. An electric car is rated at 38 ​kWh/100 mi.   a. Is a vehicle rated 27 ​kWh/100 mi more or less efficient than this electric​ car? b. How much energy​ (in kilowatt-hours) is required to drive this electric car 260miles? c. Assuming electricity costs ​$0.14​/kWh, how much does it cost to drive this electric car 350 ​miles?

You place an ice cube in a microwave oven. If it requires 32,165 J to melt the ice cube and the oven delivers 98 W of power to the ice cube, determine the time (in min) needed to melt the ice cube. min