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3 years ago

7

Match each form of energy with its description.

1 answer:

jekas [21]3 years ago

7 0

Answer:

a box moving along a conveyor belt possesses kinetic energy.

Lightning produced during a storm gives electrical energy.

a piece of fruit hanging from a tree possesses gravitational potential energy.

Sand on a beach feel warm to touch because the sand possesses thermal energy.

Radio waves transmitted from a tower (radiant energy).

Explanation:

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The chart below shows the amount of coal mined in four different states of USA in the year 2005.

ozzi

The correct answer is <span>Montana.

In fact, we see from the table that Montana is the state with the largest amount of coal mined in 2005: 120 billion tons, while all the other states have a smaller amount of coal mined (37, 68 and 78, for West Virginia, Wyoming and Illinois, respectively).</span>

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4 years ago

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What type of matter is 10 grams of calcium?<br><br> plz help me begging

castortr0y [4]

Answer:

A pure element.

Explanation:

Calcium, being whatever weight, is a pure element.

<em>Hope this helped! Have a good day.</em>

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3 years ago

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A gas has an initial volume of 168 cm3 at a temperature of 255 K and a pressure of 1.6 atm. The pressure of the gas decreases to

grandymaker [24]

P1V1/T1 = P2V2/T2

(1.6atm)(168cm^3)/(255K) = (1.3atm)V2/(285K)

Final volume = 231cm^3

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4 years ago

Consider a point on a bicycle wheel as the wheel makes exactly four complete revolutions

Slav-nsk [51]

It makes a cycloid pattern in parametrics if that's what you're asking~

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3 years ago

Small blocks A and B are held at rest on a smooth plane inclined at 30° to the horizontal. Each is held in equilibrium by a forc

Olin [163]

<h3><u>Answer</u> :</h3>

First of all, See the attachment for better understanding $.$

<u>_</u><u>_</u><u>_</u><u>_</u><u>_</u><u>_</u><u>_</u><u>_</u><u>_</u><u>_</u><u>_</u><u>_</u><u>_</u><u>_</u><u>_</u><u>_</u><u>_</u><u>_</u><u>_</u><u>_</u><u>_</u><u>_</u><u>_</u><u>_</u><u>_</u><u>_</u><u>_</u><u>_</u><u>_</u><u>_</u><u>_</u><u>_</u><u>_</u>

❂ <u>Weight of block A</u> :

➝ mg sin30° = 18

➝ W (1/2) = 18

➝ W = 18×2

➝ <u>W = 36N </u>

❂ <u>Weight of block B</u> :

➝ N sin30° = 18

➝ (Mg cos30°) sin30° = 18

➝ W' (√3/2)(1/2) = 18

➝ W' (√3/4) = 18

➝ W' = 72/√3

➝ <u>W' = 41.61N</u>

5 0

3 years ago