1. Can someone help me with this? :) Which object is made of frozen gas, ice, and dust that orbits in the outermost reaches of the solar system?1) planet
2) moon
3) Kuiper Belt object
4) meteor

2. Which explanation of the solar system best fits the observations of the planets and how they orbit the sun?
1) A comet hit the sun and sent off fragments that became the planets.
2) The gravity of a large, massive star passing the sun ripped off blobs of material from it that formed the planets.
3) The planets formed at the center of a collapsing spinning cloud of gas and dust.
4) The sun and planets formed from a collapsing spinning cloud of gas and dust.

Answers

Answer 1

Answer: 1. Kuiper Belt object is made of frozen is made of frozen gas, ice, and dust that orbits in the outermost reaches of the solar system. Kuiper belt is a region which is filled with icy gaz bodies. Its structure is almost the same as the asteroid belt between Mars and Jupiter. Pluto, Makemake, Haumea are the officially recognized planets which are located in this region. 2. In my opinion, the most suitable option is: 3) The planets formed at the center of a collapsing spinning cloud of gas and dust. According to theory of solar system formation, the solar system appeared after a supernova (star explosion). A cloud of gas and dust was collapsed, and it caused a formation of a solar nebula.

Answer 2

Answer:

Answer:

1: C. Kuiper Belt object

2: D. The sun and planets formed from a collapsing spinning cloud of gas and dust.

Explanation:

I just took the test!!!

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If you notice that two waves combine and a part of the resulting wave has less light intensity than either of the individual waves, you're observing A. destructive interference. B. polarization. C. constructive interference. D. diffraction.

Solid substances can exist in more than one form. A.True B.False

Answers

A. True

Solid substances can indeed exist in more than one form, a phenomenon known as "allotropy" or "polymorphism." In allotropy, the same element or compound can have different crystal structures or arrangements of atoms in the solid state, resulting in distinct physical properties.

Common examples include carbon, which can exist as both diamond and graphite, and sulfur, which has multiple crystalline forms. These different forms of solids can have different properties, such as hardness, density, and electrical conductivity, even though they are made up of the same chemical elements.

Water _____.a. has a pH value of 0
B: expands when it freezes
C: is less dense than ice
D: dissolves in most substances

Answers

Water does not have a pH of 0, its actually 7. Also, it is not less dense than ice. Lastly, it does not dissolve in most substances, its the complete opposite. As its a solvent, not a solute.

Answer: B

a car travelling at 36 km/hr due north turns west in 5 s under constant acceleration and maintains the same speed. the acceleration of the car is

Answers

If acceleration is constant we calculate it from the formula:
a= $(v)/(t)$
v=36 $(km)/(h)$
t=5s
We convert units:
t=5s= $(1)/(12)$ h
a= $(36)/( (1)/(12))$ =432 $(km)/(h²)$ =0,033333333333333 $(m)/( s^(2) )$

Wave A has a long fetch. Wave B has a short fetch. Which of the following statements is true? Wave A is more powerful than Waveb. Wave B is more powerful than Wave
a. Both waves are equally powerful.

Answers

Answer

Correct answer is

wave A is more powerful than wave B

Explanation

Fetch of a wave is the length of water over which a wind blow. It is clear that the wave which has longer fetch will have higher energy level. And higher energy level wave will be more powerful that wave which has short fetch. hence wave A which has longer fetch than wave B will be more powerful that wave B.

The following statement that is true is : wave A is more powerful than wave B

Longer Fetch tend to create a higher energy level, which make the wave with longer fetch is stronger than the one with shorter fetch

The potential energy of a catapult was completely converted into kinetic energy by releasing a small stone with a mass of 20 grams. The velocity of the stone when it reached the target was 15.0 meters/second. What was the value of the kinetic energy of the stone when it reached the target?

Answers

Answer: 2.25 J

Explanation: Kinetic energy is the energy possessed by an object by virtue of its motion.

$K.E=(1)/(2)* mv^2$

m= mass of object= 20 g = 0.02 kg (1 kg= 1000 g)

v= velocity of object= 15 m/s

$K.E=(1)/(2)* 0.02* 15^2=2.25kgm^2s^(-2)=2.25J$

$(1J=1kgm^2s^(-2))$

1,000 grams = 1 kilogram
20 grams = 0.02 kilogram

Kinetic energy = (1/2) (mass) x (speed)²

(1/2) (0.02) x (15)² =

(0.01) x (225) = 2.25 joules

The weather station has issued a warning because there is a tornado in your area. It is traveling northwest at 30 miles per hour. This information describes the tornado's

Answers

The weather station has issued a warning because there is a tornado in your area. It is traveling northwest at 30 miles per hour. This informationdescribes the tornado's velocity, because velocity includes speed and direction.

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