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IRISSAK [1]
3 years ago
6

Which of the following best describes reflection?

Physics
2 answers:
Margarita [4]3 years ago
4 0
B. Reflection is when waves bounce off a surface Ik this because I did it in 7th grade was my favorite unit to learn in school
Hunter-Best [27]3 years ago
3 0

Answer: diffraction

Explanation:

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Jupiter is made of gas(like Saturn, Uranus and Neptune). What would happen to the strength of gravity if you
garik1379 [7]

Answer:

a) The strength of gravity decreases if one moved away from Jupiter

b) The strength of gravity increases if one fell into Jupiter

Explanation:

The gravitational attraction is given by Newton law of gravitation as follows;

Force \ (strength) \ of \ gravity = \dfrac{G \times M \times m}{R^2}

Where;

G = The universal gravitational constant = 6.67408 × 10⁻¹¹ m³/(kg·s²)

M = The mass of Jupiter

m = The mass of the nearby body

R = The distance between the centers of Jupiter and the body

From the equation, we have that the gravitational strength varies inversely with the square of the separation distance between two bodies

Therefore, as one moves away, R increases, and the strength of gravity reduces

Similarly as the body falls into Jupiter, R, reduces the gravitational strength increases.

7 0
3 years ago
After three half-lives, one-ninth of an original radioactive parent isotope remains, and eight-ninths has decayed into the daugh
BartSMP [9]

Answer:

B. False

The true statement will be:

After three half-lives, one-eighth of an original radioactive parent isotope remains, and seven-eighth has decayed into daughter isotopes.

Explanation:

Half life means the time after which the amount of the given substance becomes half of its initial amount, by radiation.

Thus after each successive half life the material is halved or half of it is decayed, which leads to a general formula:

Remaining Amount = 1/2^n of parent isotope

where, n is the number of half lives passed. So, for three half-lives:

Remaining Amount = 1/2^3 of parent isotope

<u>Remaining Amount = 1/8 of parent isotope</u>

Thus, the decayed amount will be:

Decayed Amount = (1-1/8) of parent isotope

<u>Decayed Amount = 7/8 of parent isotope</u>

Thus, the given statement is <u>B.False</u>

8 0
3 years ago
which of the following astronomers introduced the most widely accepted hypothesis regarding the origin of the solar system?
Oksanka [162]

The astronomers introduced the most widely accepted hypothesis regarding the origin of the solar system is Immanuel Kant in 1755.

Newton's equations of gravity and rotatory motion served as the foundation for most of Kant's theories. He believed that primaeval matter, which he believed to have been generated supernaturally, was dispersed throughout the cosmos. Small, chilly, hard particles made up this substance.

Due to the gravitational pull of one another, these particles were drawn to one another.

In his 1755  "The Universal Natural History and Views of the Heavens," Kant discusses astronomy as well as two significant cosmological theories. The first is his "Nebular Hypothesis" on the formation of stars and planets, in which he proposed that faint, thin clouds of dust and gas far out in space would collapse in on themselves under the influence of gravity, forcing them to spin to form a disc. The development of stars and planets from this rotating disc would account for the rotation of Earth and the other planets.

To learn more about Nebular Hypothesis refer the link:

brainly.com/question/27986174

#SPJ4

6 0
2 years ago
Check the correctness of formula t=2π √m/k, dimensionally​
pantera1 [17]

Hi there! Lets see!

  • m is mass, and its units are kg
  • k is the elastic constant measured in newtons per meter (N/m), or kilograms per second squared kg/s²

Therefore:

\sqrt{\dfrac{m}{k}} =\sqrt{\dfrac{[kg]}{[\dfrac{kg}{s^2}]}}  =\sqrt{\dfrac{[kg]}{[kg]}\cdot s^2} = \sqrt{[s]^2} = s

The period is given in seconds so the formula is dimensionally​ correct.

4 0
3 years ago
Does a resulting force cause acceleration? true or false?
Vesnalui [34]
True...<span>A moving </span>object<span> with a zero </span>resultant force<span> keeps moving at the same speed and in the same direction. If the </span>resultant force<span> acting on an </span>object<span> is not zero, a stationary </span>object<span> begins to </span>accelerate<span> in the same direction as the </span>force. A movingobject<span> speeds up, slows down or changes direction</span>
7 0
4 years ago
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