Which of the following statements describes an electric generator?A. A magnet is rotated through a coil of wire to produce an electric current.
B. Electric potential in a rotating coil of wire creates a permanent magnet.
C. An electrical current causes a coil of wire to rotate in a magnetic field.
D. Forces from a permanent magnet allow a coil of wire to rotate.

Answers

Answer 1

Answer:

Answer:

A. A magnet is rotated through a coil of wire to produce an electric current.

Explanation:

An electric generator works on the principle of Faraday's law of induction. As the magnetic flux linked with the coil changes, an emf is induced in the coil and current is produced.

An electric generator converts mechanical energy to electrical energy.

Thus, the correct statement that describes the an electric generator is: A. A magnet is rotated through a coil of wire to produce an electric current.

Answer 2

Answer: An electric generator is when a magnet is rotated through a coil of wire to produce an electric current.

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What are geothermal heat pumps used for?a. Cooling and heating buildings
b. Cooling buildings
c. Heating buildings
d. Heating water for using in homes

Answers

Heat pumps are also known as refrigeration units for heating and cooling homes by taking heat from air outside in the winter time and then reversed to take heat out of the inside of a home in the summertime. The Geothermal heat pumps take heat from the ground by way of buried pipes deep in ground with chemicals such as water and glycol or similar and transfers that heat into homes in the winter time.
Heating buildings

The main difference between speed and velocity involves A. distance.
B. gravity.
C. weight.
D. direction.

Answers

D. Direction, if someone is traveling on an interstate from New York to Boston at 65 MPH, the speed of the car is 65 MPH and the velocity is 65 MPH north-east.

Speed does not include direction.
Velocity includes direction.

Therefore, the main difference between speed and velocity is D. Direction.

FINAL ANSWER: D. direction

What is the difference between a meteorite and a asteroid?

Answers

What's the DiDifference Between Asteroids & MeteoritesBy Karen S. Garvin, eHow ContributorSharePrint this articleAsteroids can become meteorites if they fall to Earth.Both asteroids and meteorites originate in outer space. Asteroids are small planet-like bodies that orbit the sun, and known as planetoids or minor planets. The asteroid belt that lies between Earth and Mars contains hundreds of thousands of these planetoids. Sometimes asteroids fall out of orbit and hit the Earth, and then they become meteorites. However, not all meteorites are asteroids, and meteorites may be from the Moon or another planet.Other People Are ReadingThe Characteristics of Comets, Meteors & AsteroidsWhat Kind of Sediment Is a Piece of Meteorite?AsteroidsAsteroids are small rocky bodies that orbit the sun. Between Mars and Jupiter is the asteroid belt, thought to be a planet that broke apart. Asteroids are inactive, which means they do not have ongoing geologic processes, such as plate tectonics or active volcanoes. An asteroid can become a meteorite if it escapes from orbit and collides with Earth.MeteoritesMeteorites are meteoroids that have impacted the Earth's surface. A meteorite may in fact originate as an asteroid, but meteorites can also come from outside of the solar system. These rocky extraterrestrials can be iron, iron compounds, or stone. Iron meteorites comprise only about 10 percent of all meteorites and contain nickel, which tells scientists they are from outer space.Sponsored Links3D Ground/Earth ScannersGraphical Measuring Results. No Need For A Computer-Get A Quote Nowokm-emirates.com/GroundScannerThe Makeup of Asteroids and MeteoritesScientists once thought asteroids and meteorites consisted of the same materials: stone and iron compounds. However, spectral analyses showed a difference in the reflectance patterns between asteroids and meteorites. It turns out that space weathering, caused by the flow of high-energy ions and small particles, erodes the surface of an asteroid by vaporizing it, and then depositing a layer of film that makes the surface appear dark red. Common meteorites do not have this discoloration.Why Scientists Study AsteroidsScientists study the asteroid belt to gain an understanding of the formation of our solar system and its planets. Asteroids within the asteroid belt between Mars and Jupiter consist of melted minerals. Asteroids from the outer solar system tend to be carbon. The largest asteroid in our solar system is Ceres, which is 580 miles in diameter.The Asteroid MenaceMost asteroids occupy the asteroid belt and orbit the sun in an elliptical orbit. However, some follow different orbits that may bring them into close proximity to Earth. Some scientists believe an asteroid impact caused the extinction of the dinosaurs about 65 millions years ago. Some scientists worry that another asteroid could hit the Earth and wreak havoc on our planet.fference Between an Asteroid and a Meteor?

Asteroids are a rocks which are a part of asteroid belt in our solar system. Sometimes these asteroids get deflected from their paths and attracted towards earth. When the rocks enter earth's atmosphere, they get burnt due to friction with atmosphere. Some asteroids are large enough and get burnt only partially and reach earth's surface. The rocks which reach the earth's surface are called meteorites.

A car climbs 10.0 kilometers up a hill that inclines 8.0 degrees. What is the car's vertical displacement?

Answers

The correct answer to the question is : $1.392\ Km$

CALCULATION:

The angle of inclination of the hill with the horizontal ground $\theta =\ 8^(0)$ .

The magnitude of displacement or the distance travelled by the car up that hill is given as -

distance S = 10.0 Km.

We are asked to calculate the vertical displacement.

Applying vector resolution process, we get-

(a) $Scos\theta$ is the horizontal component

(b) $Ssin\theta$ is the vertical component.

Hence, the vertical displacement is calculated as -

Vertical displacement $S_(y) =\ S\sin\theta$

$=\ 10* sin8^(0)$

= 1.392 Km.

Hence, the vertical displacement of the car is $1.392\ Km$

A race car is moving with a velocity of 144 kilometers/hour. The driver applies the brakes, and the car comes to a halt in 12.0 seconds. What is the acceleration of the car after 12.0 seconds?

Answers

The problem gives us the value for the initial velocity of the race car, and the time it takes for the race car to come to a complete stop. The question however, proves to be tricky. The question states as follow: "what is the acceleration of the car after 12.0 seconds?" Since it was already established that the car has come to a halt in 12.0 seconds, therefore, the acceleration would have to be 0, as the car would not be moving at all.

Final answer:

The acceleration of the race car after 12.0 seconds is -3.33 m/s^2.

Explanation:

To find the acceleration of the race car after 12.0 seconds, we need to use the formula for acceleration: acceleration = change in velocity / time. The initial velocity of the race car is 144 km/h, and it comes to a halt, so the final velocity is 0 km/h. We need to convert these velocities to meters per second (m/s) before using the formula.

Given that 1 km/h = 0.2778 m/s, the initial velocity is 144 km/h x 0.2778 m/s = 40 m/s. Similarly, the final velocity is 0 km/h x 0.2778 m/s = 0 m/s.

Plugging these values into the formula, we get: acceleration = (0 m/s - 40 m/s) / 12.0 s = -3.33 m/s^2.

Learn more about acceleration here:

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Which element is classified as an alkali metal?

Answers

according to the periodic table, all the elements, except hydrogen, are considered alkaline metals. ie. Li, Na, K, Rb, Cs, Fr.

Answer:

Explanation:

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