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3 years ago

Which one of the following substances is a liquid fuel used in rocket engines?

Physics

1 answer:

viva [34]3 years ago

5 0

The substance which is a liquid fuel used in rocket engines is liquid oxygen. The correct answer is A.

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Help me please (｡'-‿-｡)

Akimi4 [234]

Answer:

the layers of atmosphere are heated through radiation and convection.

Explanation:

heat is transferred from sun through radiation

and current through convection

7 0

2 years ago

Read 2 more answers

8. How did the measured angular magnification of the telescope compare with the theoretical prediction?

Genrish500 [490]

Complete Question

The complete question is shown on the first uploaded image

Answer:

The theoretical angular magnification lies within the angular magnification range

Explanation:

From the question we are told that

The focal length of B is $f_{objective } = 43.0 \ cm$

The focal length of A is $f_{eye} = 10.4 \ cm$

The theoretical angular magnification is mathematically represented as

$m = \frac{f_{objective }}{f_{eye}} = \frac{43.0}{10.4}$

$m = \frac{f_{objective }}{f_{eye}} = 4.175$

Form the question the measured angular magnification ranges from 4 -5

So from the value calculated and the value given we can deduce that the theoretical angular magnification lies within the angular magnification range

3 0

3 years ago

Which shows increasing entropy?

fomenos

Answer:

mowing a lawn

Explanation:

Entropy is the degree of disorderliness of a system. As a body moves from a more ordered state to a less ordered one, the entropy of the system increases.

Mowing a lawn is a typical example of increasing entropy.
When a lawn is being mowed, the grasses becomes disordered without any fixed orientation.
Folding a clothe is trying to bring orderliness to the clothe patterning.
Washing dishes will make one arrange them in an ordered way.
Falling leaves brings leaves together.

6 0

3 years ago

Read 2 more answers

A 1.0-kg block and a 2.0-kg block are pressed together on a horizontal frictionless surface with a compressed very light spring

egoroff_w [7]

Answer:

4. both blocks will both have the same amount of kinetic energy.

Explanation:

When the blocks are released free from the compression force, the spring exerts equal and opposite force on each block but the block with heavier (double) mass will attain slower ( half ) speed as compared to the lighter block according to the law of inertia. This works in synchronization to energy conservation.

Spring force is given as:

$F=k.\Delta x$