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3 years ago

Please help me with this i am so!! stuck

2 answers:

6 0

If small objects can be anything, basically anything goes! People could go, ants could go, they are really tiny, use your imagination, and you could think of many possibilities!

Alex17521 [72]3 years ago

4 0

The question seems kind of squishy.

The smallest objects are also the most numerous in the
whole universe. Those are the Hydrogen atoms.

The most numerous objects that are big enough for us to see
are the stars, but I'm not going to say that those are the answer.
Stick with me here, and follow my reasoning.

The Kepler space telescope is discovering so many planets
orbiting other stars outside our solar system, that it's beginning
to look like MOST stars have planets.

Stars are bigger. Planets are smaller. If most stars have planets,
then the most numerous objects that compose much of the universe
are the planets ! (plus maybe their moons too)

Does this make any sense to you ?

Now I have to ask YOU a question:
Are there any choices for answers to this question
that you're not telling us about ?

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What is the work Sarah,60kg does against gravity is she goes up a 4m high stairwell in 3 seconds?

ladessa [460]

Work can be obtained from the following expression

W = F*d

Where F is the force (In this case the force it takes to lift Sarah, which is mass*gravity)

And d is the distance traveled.

W = 60kg*9.8m/s^2 * 4m = 2352 Joules

3 0

3 years ago

A material is nonmagnetic and gaseous and does not conduct heat or electricity. It will, however, react with other elements. It

topjm [15]

Answer:

The correct option is: Nonmetal

Explanation:

Non-metals are the chemical elements that are generally present in the gaseous state at room temperature and have low electrical and thermal conductivity. These elements are non-magnetic and tend to have low density, boiling point and melting point. Non-metals have high electronegativity and ionization energy and react by sharing or gaining electrons from the other elements.

<u>Therefore, the given material is most likely a non-metal.</u>

8 0

4 years ago

Two blocks on a frictionless horizontal surface are on a collision course. one block with mass 0.6 kg moves at 0.8 m/s to the ri

Elanso [62]

First we can say that since there is no external force on this system so momentum is always conserved.

$m_1v_{1i} + m_2v_{2i} = m_1v_{1f} + m_2v_{2f}$

$0.6*0.8 + 1.2*0 = 0.6*v_{1f} + 1.2*v_{2f}$

$0.48= 0.6*v_{1f} + 1.2*v_{2f}$

$0.8 = v_{1f} + 2v_{2f}$

now by the condition of elastic collision

$v_{2f} - v_{1f} = 0.8 - 0[\tex]now add two equations[tex]3*v_{2f} = 1.6$

$v_{2f} = 0.533 m/s$

also from above equation we have

$v_{1f} = -0.267 m/s$

So ball of mass 0.6 kg will rebound back with speed 0.267 m/s and ball of mass 1.2 kg will go forwards with speed 0.533 m/s.

8 0

4 years ago

An electron in the Bohr model of hydrogen revolves around the nucleus to:

RoseWind [281]

An electron in the Bohr model of hydrogen revolves around the nucleus to possess energy.

Answer: Option B

<u>Explanation:</u>

According to Rutherford, it was stated that electrons are the subatomic particles which revolve around the nucleus. But the error of spiral collapse of these electrons is due to absence of electrons in discrete levels. Hence, in Bohr atom model, the atom's negative or electrons are said to rotate in respective energy levels.

So, they keep on revolving around a nucleus in Bohr atom is said to revolve around a nucleus in order to possess energy. Thus, each level will exhibit discrete energy levels which will contain electrons of specific energy only.

5 0

3 years ago

The quantum model suggests that electrons __________.

yan [13]

The correct answer is (d), electrons are in probable cloud location.

An atom is made up of three fundamental particles, electron, proton and neutron. Proton and neutron are located in the nucleus, while the electrons orbit the nucleus in relative large orbit, however the exact position of the electron in the shall is highly unpredictable, therefore they are assumed to be in probable cloud location where the probability of finding an electron is very high.

3 0

4 years ago