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1. science

   why are fossil fuels considered nonrenewable? A(there is an abundant amount of fossil fuels B(it is the most widely used source of energy C(it takes hundreds of millions of years for them to form** D(they are replaced within a

2. Physics

   A person is initially 8 m from a point sound source which emits energy uniformly in all direction at a constant rate. If the intensity of the source is to be halved but the sound is to be as loud as before, what distance should

3. Science

   Earth’s energy sources include both renewable and nonrenewable resources. Name at least three sources of energy that could be used in your house. Then describe the ideal energy source for generating most of your home’s

4. science

   hello, I need help... Lesson 3: Renewable and Nonrenewable Resources Quick Check Science 6 B Unit 6: Natural Resources Which resource can be used up, but is considered renewable because it can replace itself?(1 point) geothermal

1. Science (Please check my answers)

   1) Which statement correctly identifies the relative levels of kinetic and potential energy in a hydroelectric dam?(1 point) Kinetic and potential energy are both highest at the top. Kinetic energy is highest at the top; potential

2. Algebra2

   Wind farms are a source of renewable energy found around the world. The power P (in kilowatts) generated by a wind turbine varies directly as the cube of the wind speed v (in meters per second). If a turbine generates 500kW in a

3. Science pplzzz!!

   Which of the following is true about rocks? Rocks are composed of only one mineral. Rocks do not contain any nonmineral matter. Coal is not considered a true rock. Most rocks are a mixture of minerals. 2. If granite undergoes high

4. math

   A pilot can fly an MD-11 2160 miles with the wind in the same time she can fly 1920 miles against the wind. If the speed of the wind is 30 mph, find the speed of the plane in still air.( Source: Air Transport Association of

1. Science Help

   Which of the following statements describes the conservation od a natural resource? A. A factory burns coal to run its machines. B. A solar energy company harvests energy from sunlight. C. Lights in a house are turned off when not

2. science

   hello i need help Problem How could renewable energy sources be used in a house? Devise a Plan 1. Consider what you learned about renewable energy sources. Use what you learned to design a house that operates entirely on renewable

3. science

   solar,wind,nuclear,and hydroelectric energy sources are similar in which of the following ways? A. they are all nonrenewable energy sources B. they all require an indirect use of sunlight in order to make electricity C. they are

4. history

   Now, you will conduct Internet research to collect information about the Battles of Lexington and Concord. Find one primary source and one secondary source on the topic. Then, you will complete a graphic organizer that includes

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