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3 years ago

In the first law of thermodynamics, triangle E=Q-W, what does Q stand for

Physics

1 answer:

Flura [38]3 years ago

4 0

As per first law of thermodynamics we know that

$E = Q - W$

here we know that

E = internal energy of the gas

Q = heat given to the system

W = work done by the system

So this is basically energy conservation law in which Q stands for the Heat energy given to the system

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V391 Pegasi b is a star that is 4,570 light years away from Earth. What is this distance in kilometers? (One light year is about

WARRIOR [948]

Answer:

43,232 trillion km

Explanation:

Light year is the unit of distance. It is very big unit and used to measure the distances between the heavenly bodies.

1 light year = 9.46 trillion Km

So, convert 4570 light year into Km

= 4570 x 9.46 = 43232.2 trillion Km

So, the answer is 43,232 trillion Km

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3 years ago

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A motorist drives north for 35.0 minutes at 85.0 kph. He then stops for 15.0 minutes. The motorist then drives 130.0 km in 2.0 h

o-na [289]

Answer:

A. 216.36 $\frac{km}{h}$

B. 96.56 $\frac{km}{h}$

Explanation:

Let $s_{1}$ be the distance in first part.

$s_{1}$ = velocity × time

$s_{1}$ = 85 × $\frac{35}{60}$

$s_{1}$ = 49.58 km

Let $s_{2}$ be the distance in first part.

$s_{2}$ = 130 km

Average velocity = $\frac{Total displacement}{Total time}$

When second leg of the trip is

A. Toward north

Average velocity = $\frac{[tex] s_{1} + s_{2}$ }{Total time} [/tex]

Average velocity = $\frac{130+49.58}{0.25+0.58}$

Average velocity =216.36 $\frac{km}{h}$

B. Toward south

Average velocity = $\frac{[tex] s_{1} - s_{2}$ }{Total time} [/tex]

Average velocity = $\frac{130-49.58}{0.25+0.58}$

Average velocity =96.56 $\frac{km}{h}$

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3 years ago

In how many ways can five basketball players be placed in three postitions?

Mazyrski [523]

Answer:

Well if they playing a game like that

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3 years ago

All parts of the electromagnetic spectrum travel at a speed of 3 × 108 m/s when traveling through no medium. A "vacuum” means th

il63 [147K]

Answer:

the answer is D.

Explanation:

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When two volleyball players strike the ball on opposite sides of the net with the same amount of force, what happens?

cricket20 [7]

Answer:

The net force is zero because both volleyball players are hitting the ball with same force.

Explanation:

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