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zzz [600]
4 years ago
13

Which of the following is true about comets? A. The orbits of comets do not take them past the Jovian planets. B. Comets are hel

d together by frozen gases. C. All comets have long tails made of vaporizing gases. D. The Oort cloud of comets is found between Neptune and Pluto.
Physics
2 answers:
Leya [2.2K]4 years ago
8 0
I believe its B. but im not sure
olganol [36]4 years ago
8 0
I chose B and it said it was correct so go with that

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A 300 g block connected to a light spring with a force constant of k = 3 N/m is free to oscillate on a horizontal, frictionless
Usimov [2.4K]

Answer:

Time period, T = 1.98 seconds

Explanation:

It is given that,

Mass of the block, m = 300 g = 0.3 kg

Force constant of the spring, k = 3 N/m

Displacement in the block, x = 3 cm

Let T is the period of the motion of the block. The time period of the block is given by :

T=2\pi \sqrt{\dfrac{m}{k}}

T=2\pi \sqrt{\dfrac{0.3\ kg}{3\ N/m}}    

T = 1.98 seconds

So, the period of the motion of the block is 1.98 seconds. Hence, this is the required solution.

7 0
3 years ago
Could somebody double check my work???
irina1246 [14]

Answer:

I think it's correct. Hope it helps.

5 0
3 years ago
PLEASE HELP!! explain the advantages of operating a motor vehicle that is 20% efficient instead of one that is 10 % efficient
sladkih [1.3K]
Well, one is more effeciant than the other. I think it would run on less gass.
7 0
4 years ago
Two substances were mixed and there was a color change and small flames. What can you infer happened?
Norma-Jean [14]

A chemical change occurred

Explanation:

There are two types of changes, physical changes and chemical changes:

  • A chemical change occurs when the nature of a substance changes, and new substances are formed. This occurs when the bonds between molecules in the reactants break, and they re-form into new substance. A change in the colors of the substance involved is, for example, a sign that a chemical change occurred
  • A physical change occurs when there is a change in state of a substance, but no new substances are formed. For instance, a physical change is the melting of ice, or the boiling of water, or the condensation of water..

In this problem, two substances are mixed and there is a color change and small flames. The color change indicates the formation of new substances, so a chemical change has occurred. Moreover, the presence of small flames indicates that a chemical reaction has occurred (burning of oxygen), so a new substance has formed, so this is another indication of a chemical change.

#LearnwithBrainly

7 0
3 years ago
Read 2 more answers
Define polarization in reference in the simple cell​
vampirchik [111]

Answer:polarization pertains to the act or process of producing a positive electrical charge and a negative electrical charge such that between a nerve cell internal electrical charge..................

Explanation:

7 0
4 years ago
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