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3 years ago

______ states that energy cannot be created or destroyed.

Physics

2 answers:

Alex3 years ago

7 0

Answer:

c. The law of conservation of energy

Explanation:

The famous "law of conservation of Energy" states that energy inside an isolated system remains conserved. It can not be created and can't be destroyed as well. The energy can only be moved or transformed into another form.

This can be proved using "Noether's Theorem". Classically, only energy was considered conserved but Special Relativity proved that even mass is conserved as it showed the relation between mass and energy.

Pavel [41]3 years ago

4 0

The answer is a newton second law

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As part of an interview for a summer job with the Coast Guard, you are asked to help determine the search area for two sunken sh

MrMuchimi

Answer: $37^{\circ}$ North of west

Explanation:

Given

40,000-ton luxury line traveling 20 knots towards west and

60,000 ton freighter traveling towards North with 10 knots

suppose v is the common velocity after collision

conserving momentum in west direction

$20\times 40,000=(20,000+60,000)v\cos \theta$

suppose the final velocity makes \theta angle with x axis

$v\cos \theta =10----1$

Conserving Momentum in North direction

$10\times 60,000=80,000\times v\sin\theta$

$v\sin \theta =\frac{15}{2}----2$

divide 1 and 2

$\tan \theta =\frac{3}{4}$

$\theta =37^{\circ}$

so search in the area $37^{\circ}$ North of west to find the ship

3 0

3 years ago

Calculate the potential difference if 20J of energy are transferred by 8C of charge.

grin007 [14]

Explanation:

<h2>Given:</h2>

<h3>Energy = E = 20J</h3>

<h3>Charge = Q = 8C</h3>

<h2>Require :</h2>

___________

<h3>Potential Difference = V = ?</h3>

<h2>Formula :</h2>

____________

<h2>Solution:</h2><h3>_________</h3>

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4 0

3 years ago

What causes a decrease in an objects weight

Artist 52 [7]

The mass of an object can neither be change but the weight of the object can be changed.

<h3>What causes a decrease in an object weight?</h3>

The weight of the body or of an object can be changed if the body is placed farther away from the earth or placed in the planet which is far away from the earth's gravitational field, so the force of gravity on the object will change. However the mass of the body or mass of the object will remains the same regardless of whether the object is on Earth, in outer space, or on the Moon. By doing so the weight of the object or body will change but the mass remains the same.

So we can conclude that: The mass of an object can neither be change but the weight of the object can be changed.

Learn more about Weight here: brainly.com/question/86444

#SPJ1

4 0

1 year ago

How does solubility change with temperature changes?

matrenka [14]

Answer:

Solubility increases with temperature.

Explanation:

-Increasing temperatures, increases the kinetic energy that allows solvent molecules to more effectively break apart the solute molecules.

-This solute molecules are held together by intermolecular attractions which weakens in higher temperatures.

-Solubility therefore increases with increasing temperatures.

8 0

4 years ago

A tank is 6 m long, 4 m wide, 5 m high, and contains kerosene with density 820 kg/m3 to a depth of 4.5 m. (Use 9.8 m/s2 for the

Mazyrski [523]

The pressure at the bottom of the tank is given by:

P = ρgh

P = pressure, ρ = fluid density, g = gravitational acceleration, h = depth

Given values:

ρ = 820kg/m³, g = 9.8m/s², h = 4.5m

Plug in and solve for P:

P = 820(9.8)(4.5)

P = 36000Pa

5 0

3 years ago