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Roman55 [17]
3 years ago
10

Please help and if u dont know that ok but pleas don't give me the wrong answer​

Chemistry
2 answers:
Levart [38]3 years ago
6 0

Answer: The answer is 2 and 4

Contact [7]3 years ago
6 0

Answer: B

Explanation: Some types of waves are able to travel through space. Some can even travel through solids and liquids.

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Explain the Doppler effect using light. Why is the Doppler effect important in astronomy?
Alexeev081 [22]
Doppler effect is the compression or extension of a sound wave, which causes a change in its wavelength / frequency (and so its sound).
Explanation: It is defined as the effect produced by a moving source of waves in which there is an upward shift in frequency for observers, the source is moving towards and downward shift of frequency from which the source is moving away. used to tell if an object in space is moving toward or away from us.
8 0
3 years ago
Read 2 more answers
1. Review the information in the table below. Use the information to calculate rate of how many sandwiches are made in a 10-minu
PilotLPTM [1.2K]

Answer:

The answer to your question is given below.

Explanation:

Rate is simply defined as quantity per unit time. Mathematically it is represented as:

Rate = Quantity /time

Thus, we can obtain the rate as follow:

1. Quantity = 20 sandwich

Time = 10 mins

Rate =?

Rate = Quantity /time

Rate = 20/10

Rate = 2 sandwich per mins

2. Quantity = 30 sandwich

Time = 10 mins

Rate =?

Rate = Quantity /time

Rate = 30/10

Rate = 3 sandwich per mins

3. Quantity = 40 sandwich

Time = 10 mins

Rate =?

Rate = Quantity /time

Rate = 40/10

Rate = 4 sandwich per mins

4. Quantity = 50 sandwich

Time = 10 mins

Rate =?

Rate = Quantity /time

Rate = 50/10

Rate = 5 sandwich per mins

Thus, the complete table is given as follow:

Quantity >> Unit of measure >> Rate

10 >>>>>>> 10 min >>>>>>>>>> 1

20 >>>>>>> 10 min >>>>>>>>>> 2

30 >>>>>>> 10 min >>>>>>>>>> 3

40 >>>>>>> 10 min >>>>>>>>>> 4

50 >>>>>>> 10 min >>>>>>>>>> 5

4 0
2 years ago
QUESTION 3<br><br> A large system of stars held in place by mutual gravitation. IT
maxonik [38]

Answer: Galaxy

Explanation: A galaxy is a large system of stars held in place by mutual gravitation.

4 0
2 years ago
A source from which an organism benefits
maks197457 [2]

Answer:

a ecosystem

Explanation:

4 0
2 years ago
Place each phases of the moon in the correct order, starting with the new moon
9966 [12]
New moon, crescent moon, first quarter moon, gibbous moon, full moon.
Hope this Helps! :)
8 0
2 years ago
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