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maks197457 [2]
3 years ago
12

Which of the following correctly describes the hierarchy that exists in the universe? (3 points)

Physics
1 answer:
r-ruslan [8.4K]3 years ago
5 0

Answer:

D.

Explanation:

A solar system is a collection of planets, their moons, and other objects in orbit around a central star.

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When a lorge heavy truck collieds with a
arsen [322]
Yes since the heavy truck it’s way bigger it can cause more damage to the passenger car
7 0
3 years ago
Potassium-40 has a half-life of approximately 1.25 billion years. Approximately how many years will pass before a sample of pota
Maksim231197 [3]

Answer:

3.75 billion years

Explanation:

From the question given above, the following data were obtained:

Half-life (t½) = 1.25 billion years

Number of half-lives (n) = 3

Time (t) =?

The time taken for the sample of potassium-40 to contains one-eighth the original amount of parent isotope can be obtained as:

n = t / t½

3 = t / 1.25

Cross multiply

t = 3 × 1.25

t = 3.75 billion years.

Therefore, it will take 3.75 billion years for the sample of potassium-40 to contains one-eighth the original amount of parent isotope

8 0
2 years ago
At 3.00 m from a source that is emitting sound uniformly in all directions, the sound level (b) is 60.0 dB.
grigory [225]

Given that,

At 3.00 m from a source that is emitting sound uniformly in all directions, the sound level is 60.0 dB.

To find,

The distance from the source would the sound level be one-fourth the sound level at 3.00 m.

Solution,

The intensity from a source is inversely proportional to the distance.

Let I₁ = 60 dB, r₁ = 3 m, I₂ = 60/4 = 15 dB, r₂ =?

Using relation :

\dfrac{I_1}{I_2}=\dfrac{r_2^2}{r_1^2}\\\\r_2^2=\dfrac{I_1r_1^2}{I_2}\\\\r_2^2=\dfrac{60\times (3)^2}{15}\\\\r_2=6\ m

So, at a distance of 6 m the sound level will be one fourth of the sound level at 3 m.

8 0
3 years ago
What is the acceleration due to gravity on Mars?
Leona [35]

The acceleration of gravity on Mars is about 3.7 m/s². (b)

So anything located on the surface of Mars weighs about 38% of what it would weigh if it were on Earth.

8 0
3 years ago
Please help ASAP I have to turn this in soon
Allisa [31]

Answer:

See in explanation

Explanation:

Scientific use: The Einstein's THEORY of relativity states that "Time Is Absolute".

Everyday use: Einstein's LAW of relativity says that time is not the same at all places and events.

5 0
3 years ago
Read 2 more answers
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