Currently, is our planet an open or closed system?

Answers

Answer 1

Answer: Our planet is closed system because there is a limit of how much matter could be exchanged.

Related Questions

Solar cells convert what type of energy into electrical energy?
How does an atom charge if all the electrons are removed
The gravitational potential energy of an object Is always measured relative to the
The weight of a body floating in a liquid is
How does the density of the metal in the crushed can compare with the metals density before the can was Crushed

As the mechanical advantage increases what happens to the length of the string you have to pull to raise the block?

Answers

the string will tighten up to move the block

While watching a recent science fiction movie, one Klingon spaceship blows up a Droid spaceship with a laser gun. The Klingon crew watches out the port window and covers their ears to muffle the noise from the explosion. Scientifically, this scene is inaccurate becauseA) light can not reflect off objects in the vacuum of space.
B) they would not be able to see anything outside the window.
C) lasers can not be transmitted through the vacuum of space.
D) the sound of the explosion would not be transmitted back to their ship.

Answers

Scientifically this scene is inaccurate because the sound of the explosion would not be transmitted back to their ship. The correct option among all the options that are given in the question is the last option or option "D". As sound cannot travel through a vacuum, so it is not possible for the crew to hear the sound of explosion.

Answer:

D. the sound of the explosion would not be transmitted back to their ship.

Explanation:

Sound is a type of mechanical wave so it needs a solid to move through. Since space is a vacuum, the Klingon crew would not be able to hear the explosion.

A car battery with a 12 V emf and an internal resistance of 0.11 Ω is being charged with a current of 56 A. What are (a) the potential difference across the terminals, (b) the rate Pr of energy dissipation inside the battery and (c) the rate Pemf of energy conversion to chemical form? When the battery is used to supply 56 A to the starter motor, what are (d) V and (e) Pr

Answers

Answer:

Part a)

V = 18.16 V

Part b)

$P_r = 345 Watt$

Part c)

P = 672 Watt

Part d)

V = 5.84 V

Part e)

$P_r = 345 Watt$

Explanation:

Part a)

When battery is in charging mode

then the potential difference at the terminal of the cell is more than its EMF and it is given as

$\Delta V = E + i r$

here we have

$E = 12 V$

$i = 56 A$

$r = 0.11$

now we have

$\Delta V = 12 + (0.11)(56) = 18.16 V$

Part b)

Rate of energy dissipation inside the battery is the energy across internal resistance

so it is given as

$P_r = i^2 r$

$P_r = 56^2 (0.11)$

$P_r = 345 W$

Part c)

Rate of energy conversion into EMF is given as

$P_(emf) = i E$

$P_(emf) = (56)(12)$

$P_(emf) = 672 Watt$

Now battery is giving current to other circuit so now it is discharging

now we have

Part d)

$V = E - i r$

$V = 12 - (56)(0.11)$

$V = 12 - 6.16 = 5.84 V$

Part e)

now the rate of energy dissipation is given as

$P_r = i^2 r$

$P_r = 56^2 (0.11)$

$P_r = 345 W$

The second law of thermodynamics states that whenever energy changes occur, __________ always increases.

Answers

The second law of thermodynamics states that whenever energy changes occur, DISORDER always increases.

Final answer:

The Second Law of Thermodynamics states that entropy, which represents the disorder or randomness in a system, always increases when energy changes occur. An example would be heat dispersing from a hot drink into the environment.

Explanation:

The Second Law of Thermodynamics states that whenever energy changes occur, entropy always increases. Entropy refers to the degree of disorder or randomness in a system. Thus, the law is essentially asserting that natural processes tend towards chaos or disorder. For example, if we consider a cup of hot coffee left on a table, with time, the heat (energy) from the coffee disperses into the surrounding environment, leading to an increase in entropy. This concept applies universally in closed systems, where energy cannot enter or leave.

Learn more about Second Law of Thermodynamics here:

brainly.com/question/32826461

#SPJ3

What is a longitudinal wave?a. particles that travel in parallel to the direction of energy movement
b. particles that travel in a reverse direction to the direction of energy movement
c. particles that travel perpendicular to the direction of energy movement
d. particles that travel in an intersecting direction to the direction of energy movement

Answers

The answer is 'A', they travel parallel to the direction of motion

Answer:

Explanation:

i learned this last week in school.

If (on earth) an object falls 18m and loses 36J of GPE. What is the objects mass?

Answers

The gravitational potential energy of the object falling from 18 m height is 36 J. Thus, its mass is 0.2 Kg.

What is gravitational potential energy?

Gravitational potential energy of an object is the energy generated by virtue of its position in a gravitational field. The magnitude of gravitational potential energy is directly proportional to the mass of the object , height from the surface and the acceleration due to gravity.

GPE = mgh

The height of the object falling = 18 m

Gravitational potential energy = 36 J

Acceleration due to gravity in earth = 9.8 m/s².

Mass of the object = GPE/ (gh)

= 36 J/ (18 m×9.8 m/s² )

= 0.20 Kg.

Therefore, the mass of the object is 0.20 Kg.

To find more on gravitational potential energy, refer here:

brainly.com/question/19768887

#SPJ2

PE=mgh
Where 'g' is the gravitational constant (9.81 m/s^2)
If you're solving for m, you can change the equation to be (PE/gh)=m.
m=(36J/18m*9.81m/s^2)
m=.2kg

Other Questions

Why does a vibraing simple pendulum not produce any sound

islas change in velocity is 30 m/s, and hazel has the same change in velocity. which best describes explains why they would have different accelerations

Which of the following is a type of antimatter created in some nuclear fusion reactions within stars?A. photon B. positron C. neutrino D. helium-4

The leaning tower of Pisa is about 56 meters tall. A ball released from the top takes 3.4 seconds to reach the ground. The final velocity of the ball before it hits the ground is 33 meters/second. Assuming that the ball experienced a constant acceleration throughout this descent, calculate the magnitude of the acceleration