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3 years ago

A rocket launches because of __________.

Chemistry

2 answers:

motikmotik3 years ago

5 0

Answer:

A, an opposite reaction

Hope this helps :)

Liono4ka [1.6K]3 years ago

4 0

Answer:

an opposite reaction

Earth's gravity is still pulling down on the rocket. When a rocket burns propellants and pushes out exhaust, that creates an upward force called thrust. To launch, the rocket needs enough propellants so that the thrust pushing the rocket up is greater than the force of gravity pulling the rocket down.

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A compound is a substance made up of 2 or more _____.

krek1111 [17]

A compound is a substance made up of 2 or more elements

5 0

3 years ago

Two objects of equal mass have a force of gravity of 6 N between them. Imagine the mass of one is cut in half and the other stay

Alenkasestr [34]

Answer:

F' = 3 N

Explanation:

Given that,

Two objects of equal mass have a force of gravity of 6 N between them.

If the mass of one is cut in half and the other stays the same such that,

m₁' = m₁ and m₂' = (m₂/2)

We need to find the new force. The gravitational force between two objects is given by :

$F=G\dfrac{m_1m_2}{r^2}$

We have, F = 6 N

New force,

$F'=G\dfrac{m_1'm_2'}{r^2}\\\\F'=\dfrac{Gm_1\times \dfrac{m_1}{2}}{r^2}\\\\=\dfrac{1}{2}\times \dfrac{Gm_1m_2}{r^2}\\\\F'=\dfrac{F}{2}\\\\F'=\dfrac{6}{2}\\\\F'=3\ N$

So, the new force becomes 3 N.

3 0

3 years ago

Josie bought some frozen meat in a vacuum sealed package. What is one of the main reasons the manufacturer used this packaging?

Kazeer [188]

Answer:

<u><em>The sealing helps prevent oxidation from occurring.</em></u>

Explanation:

3 0

4 years ago

Read 2 more answers

Which sample contains the largest number of oxygen atoms? Select one: a. 8.0 g of carbon dioxide b. 8.0 g of potassium chlorate

adell [148]

The sample with the largest number of oxygen atoms will be calcium perchlorate.

<h3>Number of atoms in a compound</h3>

Since we are not looking at the number of moles, the mass of the compounds has no bearing on the number of atoms of oxygen.

The chemical formula for carbon dioxide is $CO_2$ . Thus, it has 2 atoms of oxygen.
The chemical formula for potassium chlorate is $KClO_3$ . Thus, it has 3 oxygen atoms.
The chemical formula for calcium perchlorate is $Ca(ClO_4)_2$ . Thus, it has 8 atoms of oxygen.
The chemical formula for sodium hydroxide is NaOH. Thus, it has 1 atom of oxygen.

Therefore, the compound with the largest number of oxygen atoms is calcium perchlorate.

More on the number of atoms in compounds can be found here: brainly.com/question/1686912

#SPJ1

5 0

2 years ago

Identify the structure of (E)-2-butenal

Elenna [48]

Answer:

See attached picture.

Explanation:

Hello,

In this case, the E-Z nomenclature for alkenes is also related with the trans-cis ones, being the Z (zusammen) same as cis and E (entgegen) same as trans, therefore, for the structure of the (E)-2-butenal which has the double bond at the second carbon is shown on the attached picture considering it is an aldehyde with the carbonyl group due to the -al- suffix.

Regards.

3 0

3 years ago