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3 years ago

How did albert einstein explain the photoeletric effect?

1 answer:

8 0

People used to think that when light hits a cable next to another cable, electrons jumped from one to another. People thought it happened because waves of light made atoms vibrate until they ejected an electron. But Einstein thought it could be wave packets named photons. He explained this by shining light on a metal plate and knocking off electrons and hitting a nearby collector. Some of the energy was needed to free the electron, the energy was bound and the rest of the energy gone to the kinetic of the electron.

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In balancing an equation, we change the __________ to make the number of atoms on each side of the equation balance.

Gnesinka [82]

If you are talking about chemistry, it's coefficient!

7 0

2 years ago

Scientist looking for new substances in plants grind up the plants with methanol. This solvent dissolves many plant compounds. H

liubo4ka [24]

Answer:

See explanation

Explanation:

Crystals can be made from methanol by recrystallizing the plant extract from methanol.

The methanol/water system is heated rapidly using a hot plate and the plant extract dissolves in the heating solution until a clear solution is obtained.

The solution is now cooled rapidly. The interior of the flask used for the re crystallization may even by scratched to assist the quick formation of crystals. Large crystals of plant compounds may be obtained using this method. This process should be carried out in a fume hood because of the toxicity of methanol.

4 0

2 years ago

I'd really appreciate help- this is due in around 8 hours :"D

Fed [463]

Answer:

atomic #= 1

protons equals one
Number of neutrons equals to 0
number of electrons equal to 1
mass number equals to 1

atomic number equals to 1
Protons equals to 1
number of neutrons equals to 0
number of electrons equals to 0 because the plus sign means that it loses an electron
mass number equals to 1

atomic number 17
number of protons 17
number of neutrons 18
number for electrons 18 Because negative sign means It's an anion which means it gains an electron
mass number 35

12
12
12
10 loses 2 its a cation
24

47
47
108-47 = 61
46 loses 1
108

16
16
32-16 =16
18 it gains 2 electrons
32

there u go

7 0

2 years ago

Complete the word equation for making a salt.

dalvyx [7]

Answer:

acid +alkaline =salt and water

Explanation:

if an acid reacts with an alkaline they form salt and water

4 0

3 years ago

Read 2 more answers

The law of universal gravitation describes the gravitational force between two objects.

Sliva [168]

Answer:

mass and distance

Explanation:

The strength of this force depends on the <u>mass</u>

of each object and

the <u>distance</u>

between them.

6 0

2 years ago