Un herrero calienta un trozo de acero en un horno para poder forjarlo.A medida que aumenta la temperatura del metal ¿Que ocurre con su densidad?¿Aumenta o disminuye? Explica tu respuesta

Answers

Answer 1

Answer:
La densidad del metal disminuye a medida que se calienta . Piense en el agua . Cuando hace frío , se convierte en hielo , lo cual es muy densa . Cuando hace calor , se evapora en gas , que no es denso.

Espero que esto no es confuso , yo no soy un hablante nativo de español .

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Help with number 32
Apparently the answer is 4 but I have no idea why

Answers

All you have to remember is that when the source is APPROACHING the observer,
the frequency seems HIGHER than what's actually leaving the source.

The siren is wailing at 1,000 Hz.

(1). 30.0 Hz . . . that's way lower

(2). 9.19 x 10² Hz = 919 Hz . . . that's lower

(3). 1.00 x 10³ Hz = 1,000 Hz . . . that's exactly the same

(4). 1.10 x 10³ Hz = 1,100 Hz . . . that's the only choice that's higher than 1,000 Hz.

Which states the law of conservation of energy?A.
Energy cannot be created or destroyed, but it can be converted or changed into different forms.

B.
Energy can be created or destroyed, and it can be converted or changed into different forms.

C.
Energy cannot be created or destroyed, nor can it be converted or changed into different forms.

D.
Energy can be created or destroyed, but it can not be converted or changed into different forms.

Answers

Statement A is correct. Energy cannot be created or destroyed it can only be converted or changed into different forms.

The other forms include kinetic, potential and internal energy. Heat, and work are also other forms of energy.

b. Energy can be created or destroyed, and it can be converted or changed into different forms.

Which characteristic should a good scientific question have?

Answers

Answer:

explained

Explanation:

A Good scientific question must lead to a hypothesis and must help in answering the reason for any observation. It should be testable, meaning it can be performed as an experiment. At the same time the formed hypothesis can be falsifiable, that is it can fail. For example, the sound generated by a moving car. The question can be is there any correlation between speed of car and the noise it generate. It can result in a hypothesis that at higher speed more noise occur. It can very easily tested.

A good scientific question should be pre-determined and also have a meaning or relation to science.

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.

An object will remain at rest or maintain constant, straight-line motion unless acted on by a force that is ___________________.A.inertialB.balancedC.unbalancedD.along a straight lineCan someone explain it somehow for me?.

Answers

c) unbalanced . Because if the forces on an object are not balanced, meaning the sum of them is not '0' the object will accelerate to the direction of their sum.

You can see it in the picture. The forces on the object A are balanced meaning their sum is 0 so it will remain at rest or maintain constant. But object B the forces acting on it are not balanced so it will accelerate to the right.

C.unbalanced
Newton's Law explains that an object continues at constant speed due to the net force acting on the object being zero. When the net force is not zero (unbalanced), then there is a net force and the object will accelerate.

You are at the Super Bowl. The coach puts you in during the 4th quarter to be the quarterback to secure your team the win. Since you are fresh off the bench, you are able to throw the ball with more force than the last person. What advantages, using Newton's second law, will this have when playing?

Answers

Answer:

the ball will fly faster, and longer distance, which means there is going to be less air resistnace friction acting upon the ball.

Explanation:

F = ma

Force = mass x acceleration

Mass of football remains constant, fresh arm of QB provides higher acceleration.

Ball will get to receiver faster.

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