Which is an example of a physical change* metal rusting
silver tarnishing
water boiling
* paper burning

Answers

Answer 1

Answer: Water boiling is an example of a physical change. The rest are chemical changes.
Hope that helps!!

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Asteroids are larger than??A- planets
B- the sun
C- stars
D- meteoroids

Answers

the answer would be meteoroids, as a meteoroid is a broken off piece of an asteroid. hope i helped :3

Asteroids are larger than meteoroids

Okay! Last question was a warm-up question. And now to get your brain thinking some more, how about another one?:First you eat me, then you get eaten. What am I?

Answers

the correct answer is a fishhook

well the answer is fish bait as the fish eats the bait and then the fish gets eaten ??

Please can you help me!!A group of pupils have a ray box, a mirror, a glass box and a prism. For each block, describe what happens when the ray is directed at it. Use as much scientific knowledge and understanding in your answers as you can. Focus on the processes of reflection , if this happens at all and refraction and dispersion.

Answers

In a mirror, the light ray undergoes reflection, in a glass block, the light ray undergoes refraction. For a prism, a light ray undergoes refraction and dispersion and in a glass box with a smooth surface, it may experience both reflection and refraction.

These processes of reflection, refraction, and dispersion may take place when the ray of light from the ray box is aimed at each of the objects:

Mirror: when a light beam strikes a mirror, it is reflected and reflects at an angle that is equal to the angle of incidence. According to the law of reflection, the angle of reflection and incidence are the same.

Glass Block: when a light beam penetrates a glass block at an angle, it changes direction as a result of the difference in light speed between the different media (glass and air). Refraction is the name given to this phenomenon. If the light in the glass slows down, the ray bends toward the normal, and if it speeds up, it bends away from the normal. The incidence angle and the glass's refractive index both affect how much bending occurs.

Prism: when a light beam enters a prism, it undergoes refraction as it transitions from air to the denser prism material. The rise in refractive index causes the ray to bend in the direction of the prism's base. Dispersion, or the separation of light into its individual colors (rainbow), is another effect of the prism. This occurs as a result of the various wavelengths of light diffracting differently as they pass through the prism. The stunning array of colors that occurs when light passes through a glass prism is caused by this phenomenon.

Hence, in a mirror, the light ray undergoes reflection, in a glass block the light ray undergoes refraction. For a prism, a light ray undergoes refraction and dispersion and in a glass box with a smooth surface, it may experience both reflection and refraction.

To learn more about Reflection, here:

brainly.com/question/9063836

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When it is shined at the mirror, it will simply reflect, and go in a straight line to the next point it will encounter.
When shined at the glass box, the laws of refraction and dispersion will work to create a displacement of the light once it hits the first wall, but then it will replace itself coming out via the second wall
for the prism, it will refract into all colors of the rainbow because of how the wavelengths separate.

The Statue of Liberty is composed of copper. The smallest particle of any amount of copper is A)
an atom.

B)
an element.

C)
a compound.

D)
a molecule.

Answers

Option A, because the atom is the smallest molecule, it is the smallest particle containing copper as part of the copper family, which are the best conductors of electricity and is a transition metal with atomic number. With this metal is composed the statue of liberty.

TRUE OR FALSE: ancient swamp plants slowly decayed and turned into peat, the first step in making coal.

Answers

Answer:

True

Explanation:

In the first step of coal making all the plant species and trees which start decaying, gets buried under the earth crust and lead to the formation of peat. The peat is further acted upon by the heat and pressure thereby leading to the formation of lignite coal (soft brown coal), which further turns into bituminous coal (black and brittle) and then get converted into anthracite (highest carbon content and is found at greatest depth)

not so fast! you are right the first step is that the plants and animals have to decay then they turn to peat and then in a million years time you have coal !!!!!!! :)

2. A ball tied to a pole by a rope swings in a circular path with a centripetal acceleration of 2.7 m/s. If the ball has atangential speed of 2.0 m/s, what is the diameter of the circular path in which it travels?