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3 years ago

Space exploration was aided most by the

Chemistry

2 answers:

Mashutka [201]3 years ago

7 0

The answer is Liquid fuel

densk [106]3 years ago

3 0

Explanation:

Space exploration was aided most by the use of liquid fuel.

Hope this helps.. 

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The Milky Way Galaxy is one of

9966 [12]

Answer:

Billions in the known universe!

Explanation:

Because there are approximately 100 billion galaxies in the observable universe.

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3 years ago

Read 2 more answers

The AE of a system that releases 12.4 J of heat and does 4.2 J of work on its surroundings It is_______ jA. 16.6 B. 12.4 C. 4.2

andre [41]

ANSWER

EXPLANATION

Given that

The energy released by the system is 12.4J

Work done on the surrounding is 4.2J

Follow the steps below to find the change in energy

In the given data, energy is said to be released to the surroundings

Recall, that exothermic reaction is a type of reaction in which heat is released to the surroundings. Hence, change in enthalpy is negative

Step 1; Write the formula for calculating change in energy

$\Delta E\text{ }=\text{ q }+\text{ w}$

Since heat is released to the surrounding, then q = -12J

Recall, that work done by the system on the surroundings is always negative

Hence, w = -4.2J

Step 2; Substitute the given data into the formula in step 1

$\begin{gathered} \text{ }\Delta E\text{ = q + w} \\ \text{ }\Delta E\text{ }=\text{ -12.4 }+\text{ \lparen-4.2\rparen} \\ \text{ }\Delta E\text{ = -12.4 - 4.2} \\ \text{ }\Delta E\text{ }=\text{ -16.6J} \end{gathered}$

Therefore, the change i

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1 year ago

What starts a convection current in the mantle?

julsineya [31]

Heat in the mantle comes from the Earth's molten outer core, decay of radioactive elements and, in the upper mantle, friction from descending tectonic plates.The temperature difference between the upper and lower boundaries of the mantle requires heat transfer to occur.

Material heating up in the mantle

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2 years ago

How do you make a guy who is extremely into you, even though he knows you aren't single, to bug off?

kvasek [131]

Be kind yk? tell him have some respect for your relationship and if he can't then cut him off completely

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3 years ago

Read 2 more answers

To fulfill the octet rule electron sharing leads to ____ electrons around each atom?

Dimas [21]

D. 8

You can predict it from it's name "Octet" means Eight. Atom must have that number of electron to have a stable structure!

Hope this helps!