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timama [110]
3 years ago
10

What is dark matter and what is dark energy

Chemistry
1 answer:
nataly862011 [7]3 years ago
5 0

Answer:

Dark matter slows down the expansion of the universe, while dark energy speeds it up

Explanation:

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If a speaker is moved from 2 feet away to 4 feet away, the volume of the sound will: half double quarter stay the same
neonofarm [45]

Answer:

the volume of the sound will quarter

Explanation:

As you move far away from the source, the loudness of sound decreases. This is because as the distance from the source increases, the area it covers also increases thereby spreading the energy over a great area leading to lesser loudness and intensity.

As a result of this, sound intensity follows an inverse square law:

I ∝ 1/d²; where I is the intensity and d is the distance from source.

Therefore If a speaker is moved from 2 feet away to 4 feet away (increment of 2 feet), the volume of the sound would quarter (1/2² = 1/4)

6 0
3 years ago
HELP WITH THIS EASY SCIENCE WORK
Trava [24]

Answer:(1)The urinary system's function is to filter blood and create urine as a waste by-product.

(2) two kidneys we have.

(3)The kidneys act as very efficient filters for ridding the body of waste and toxic substances, and returning vitamins, amino acids, glucose, hormones and other vital substances.

(4)Two ureters. These narrow tubes carry urine from the kidneys to the bladder. Muscles in the ureter walls continually tighten and relax forcing urine downward, away from the kidneys.

(5)A hollow, muscular, balloon-shaped organ that expands as it fills with urine.

(6)The urethra is the vessel responsible for transporting urine from the bladder to an external opening in the perineum.

(7)Urine is formed in the kidneys through a filtration of blood. The urine is then passed through the ureters to the bladder, where it is stored. During urination, the urine is passed from the bladder through the urethra to the outside of the body.

Explanation:

8 0
3 years ago
Of the five NASA space shuttles, which one flew the most missions?
Irina-Kira [14]

Endeavour is the youngest shuttle in NASA's orbiter fleet, and was built as a replacement for Challenger. The shuttle flew 25 missions over the course of its spaceflying career, logging a total of 122,883,151 miles (197,761,261 km) on its odometer. Endeavour launched on its maiden flight, STS-49, on May 7, 1992.

8 0
3 years ago
Chemical reaction equations
HACTEHA [7]

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Diet coke and mentos

Explanation:

who says no to mentos?

3 0
4 years ago
Which of the following is a property of a pure substance?
wolverine [178]
D.) the original components retain their individual properties
8 0
3 years ago
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