Which explains why light bends when it passes from air to water?a) It generates more energy.

b) It is reflected.

c) It generates heat.

d) It changes speed.

Answers

Answer 1
Answer:

Answer: The correct answer is "it changes speed".

Explanation:

Refraction: it is the phenomenon which occurs when the light rays travel from one medium to the another medium.

In refraction, the light rays get bend due to the change in the speed of light rays.

In reflection, the light ray is reflected back in the same medium. The light ray reflected back after striking the obstacle without getting absorb or transmit in it.

Therefore, light bends when it passes from air to water due to change in the speed.

Answer 2
Answer: Answer: D 
Key thing to keep note, is "refraction"... 
Look at some experiments on YouTube, it's helps me a lot. 

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Air has weight.
a. True
b. False

Answers

Air is a combination of gases, gases do have a mass/weight.
so basically yes air does have weight

Classify the following as chemical or physical change: (a) adding sugar to lemonade, (b) plants using CO2 and H2O to form O2 and sugar, (c) boiling water, (d) frying an egg, (e) rust forming on metal, (f) fruit rotting, (g) removing salt from water by evaporation.

Answers

Answer:

A change is said be chemical change when a change in chemical property of a substance occurs and the new substance is chemically different from old one. A change is said to be physical change when only physical properties change but chemically the substances remain same.

a) adding sugar to lemonade- It is a physical change because sugar is being dissolves in the lemonade. There is no change in the chemical property.

b) plants using CO₂ and H₂O to form O₂ and sugar is a chemical change because new products which are chemically different are formed.

c) boiling water - is a physical change because only the physical state from liquid to gas changes. Chemically water retains its properties.

d) frying an egg - the properties of egg changes after frying. Hence, it is a chemical change. A fried egg does not retain properties of an uncooked one.

e) rust forming on metal- is a chemical change. Corrosion ( rusting) is a chemical change as rust is chemically different from the metal.

f) fruit rotting - is a chemical change. When microbes act on the fruit, the fruit starts to rot.

g) removing salt from water by evaporation- it is a physical change. The salt and water retain their physical properties as mixture and when separated by evaporation process.


(a) physical (b) chemical (c) physical (d) chemical (e) chemical (f) chemical (g) physical

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Answers

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Answers

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Answers

Answer:

Adiabatic

Explanation:

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Answers

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Explanation: