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Olegator [25]
4 years ago
7

Explain the Doppler effect using light. Why is the Doppler effect important in astronomy?

Chemistry
2 answers:
Alexeev081 [22]4 years ago
8 0
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.
USPshnik [31]4 years ago
6 0

Answer:

When a star is moving away the light looks red or redder. And when a star is moving toward you it is blue or bluer. This is important because you can tell which way the star is moving.

Explanation:

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What is defined as the basic unit in the metric system that describes a quality?
Taya2010 [7]

Answer:

Explanation:

The metric system is a system of measurement that uses the meter, liter, and gram as base units of length (distance), capacity (volume), and weight (mass) respectively.  

 

To measure smaller or larger quantities, we use units derived from the metric units

 

metric-system

 

The given figure shows the arrangement of the metric units, which are smaller or bigger than the base unit.

The units to the right of the base unit are smaller than the base unit. As we move to the right, each unit is 10 times smaller or one-tenth of the unit to its left. So, a ‘deci’ means one-tenth of the base unit, ‘centi’ is one-tenth of ‘deci’ or one-hundredth of the base unit and ‘milli’ is one-tenth of ‘centi’ or one-thousandth of the base unit.

The units to the left of the base unit are bigger than the base unit. As we move to the left, each unit is 10 times greater than the unit to its right. So, a ‘deca’ means ten times of the base unit, ‘hecto’ is ten times of ‘deca’ or hundred times of the base unit and ‘killo’ is ten times of ‘hecto’ or thousand times of the base unit.

 

8 0
3 years ago
__________ force is the force of attraction and repulsion between subatomic particles.
SpyIntel [72]
A.) Electrical force is your answer......
4 0
3 years ago
Molecules are the smallest units of matter with the characteristic properties of a substance.
Vilka [71]
False, Atoms are the smallest units of matter that display both the chemical and physical properties of it, based on the structure of the atom.
3 0
4 years ago
35. The hydrocarbon formed during electrolysis of potassium maleate is
Fed [463]

Answer:

methane

Explanation:

5 0
3 years ago
Calculate the amount of heat required to raise the temperature of an 64 g sample of water from 32 ∘C to 69 ∘C.
Serjik [45]

Answer:

9945.6 J

Explanation:

Amount of heat = Mass * Heat Capacity * Temperature Change

Heat capacity of Water = 4.2 J/gC

Amount of heat = 64 * 4.2 * (69 - 32)

Amount of heat = 64 * 4.2 * 37

Amount of heat = 9945.6 J

4 0
3 years ago
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