1. Two magnets are placed on a table, and they immediately move to attach to each other. Which statement is correct about the energies in the system?

Kinetic energy is at its peak when the magnets are first released, then it decreases steadily. Energy stored in the magnetic field becomes zero.

The kinetic energy of the system is derived from the thermal energy created by increased velocity. Energy stored in the magnetic field does not change.

Kinetic energy and velocity are at zero when the magnets are held apart, and both increase rapidly when they are released and move together. Energy stored in the magnetic field decreases.

The velocity and kinetic energy of the system increase as the energy stored in the magnetic field increases.


2. Two magnets are placed on a table, and they immediately move to attach to each other. Which statement is correct about the energies in the system?

The energy stored in the system is converted to kinetic and thermal energy.

The energy stored in the system is converted to kinetic energy.

The energy stored in the system is converted to kinetic, thermal, and sound energy.

The energy stored in the system is converted to thermal and sound energy.


3. A magnet is moved close to a rubber band. How does the energy stored in the magnetic field change?

The energy stored in the magnetic field increases.

The energy stored in the magnetic first increases and then decreases.

The energy stored in the magnetic field does not change.

The energy stored in the magnetic field decreases.


4. Two donut-shaped magnets are stacked on top of each other with a wooden dowel in the center. The south poles of the magnets are facing each other. Once the upper magnet is released, it accelerates downward and stops 1 cm above the lower magnet. How does the energy stored in the magnetic field change?

All of the energy stored is converted into kinetic, thermal, and gravitational energy.

Some of the energy stored is converted into kinetic, thermal, and gravitational energy.

All of the energy stored is converted into kinetic and thermal energy.

Some of the energy stored is converted into kinetic and thermal energy.

Answers

Answer 1

According to the law of conservation of energy, energy can neither be created nor destroyed but is transformed from one form to another.

1) The statement that is true about the magnets involved is that; "kinetic energy and velocity are at zero when the magnets are held apart, and both increase rapidly when they are released and move together. Energy stored in the magnetic field decreases."

2) In the second question, the statement that is correct about the energies of the system is that the energy stored in the system is converted to kinetic energy.

3) When a magnet is moved close to a rubber band, the energy stored in the magnetic field does not change.

4) In the fourth question, some of the energy stored is converted into kinetic, thermal, and gravitational energy.

Learn more about energy conversion:https://brainly.com/question/4260635

Answer 2

Answer:the correct answer is: the energy stored in the system is converted to kinetic, thermal and sound energy

Explanation:


Related Questions

Which of the following was NOT a department in Washington's first cabinet?
A. Secretary of State
B. Secretary of Homeland Security
C. Secretary of War
D. Secretary of Treasury

Answers

Answer:

I believe its C: Secretary of War. I hope this helped :)

Explanation:

Secretary of Homeland Security was not a department in Washington's first cabinet. So, the correct option is B.

What is Washington's cabinet?

George Washington created the nation's first cabinet, made up of the president's most trusted advisers, where advisers advise the president on laws, taxes, foreign affairs, defense, and other important issues on how to govern the United States.

George Washington's first cabinet was consists of attorney and postmaster generals and secretaries of state, treasury, and war. This cabinets included four original members which are as follows: Secretary of State Thomas Jefferson, Secretary of Treasury Alexander Hamilton, Secretary of War Henry Knox, and Attorney General Edmund Randolph.

Therefore, the correct option is B.

Learn more about Washington's cabinet, here:

https://brainly.com/question/9316770

#SPJ6

Please please help me with those questions please please help me

Answers

Explanation:

a) E= fs

b) 2E = mv²

c) E= Mc ²

Se usa una bombona de He para inflar globos, de volumen 15L con una presión de 200 atm. Si los globos tienen un volumen de 1.5L y presión de 770mmHg. ¿Cuántos globos se pueden llenar?

Answers

Answer:

La cantidad de globos llenos es de aproximadamente 1.974 globos

Explanation:

Los parámetros dados son;

El gas utilizado para inflar el globo = Él

El volumen del gas He, V₁ = 15 L

La presión del gas He, P₁ = 200 atm = 20,265,000 Pa

El volumen de cada globo = 1,5 L

La presión del He dentro del globo, P₂ = 770 mmHg = 102,641 Pa

Sea 'V₂', que represente el volumen total que el gas ocupa en todos los globos, y 'x', que represente el número de globos;

Por lo tanto, tenemos;

1,5 · x = V₂

Según la ley de Boyle, tenemos;

P₁ · V₁ = P₂ · V₂

∴ V₂ = P₁ · V₁ / (P₂)

Al introducir los valores conocidos, obtenemos;

V₂ = 20,265,000 Pa × 15 L / (102,641 Pa) = 2,961.53548 L

1,5 L × x = V₂

∴ 1,5 L × x = 2,961,53548 L

x = 2,961.53548 L / (1.5 L) = 1,974.35699 redondeamos hacia abajo para obtener un número entero de globos de la siguiente manera;

El número de globos, x ≈ 1,974 globos.

an apple falls from the top of the tree and takes 2 secs to hit the ground.

how far did the apple fall?

calculate the velocity of the apple just before it hits the ground. ​

Answers

Height is 19.6133 meters and the Velocity is 19.613 m/s

When the chemical name of a compound is being written, the subscripts will determine the symbols. elements. prefixes. suffixes.When the chemical name of a compound is being written, the subscripts will determine the symbols. elements. prefixes. suffixes.

Answers

Answer:

C. Prefixes

Explanation:

I took the quiz on edge

Answer:

C is correcting taking test now

Explanation:

What is the density of an object with the mass of 125g and a volume of 176 m

Answers

Answer:

the density is mass over volume, so you divide 125g over 25 cm3, giving a result of 5 g/cm3

Answer:

The density is mass over volume

so you divide 125g over 25 cm3

giving a result of 5 g/cm3

you welcome have a good day!

Help me with this please everyone e

Answers

Answer:

false I wouldn't say its a consequence.

PLEASE HELP I'LL MARK BRAINLIEST ​

Answers

Answer:

B

Explanation:

What is the metric system of 1.0km to mm

Answers

Answer:

1 kilometer is equivalent to 1,000,000 <(million) millimeters

1000000 mm is the metric system of 1.0km

Directed Reading for Overview
Content Mastery
Forces and Newton's Laws
Directions: Complete the concept map using the terms listed below.
pushes and pulls
Newton's Laws
inertia
acceleration
unbalanced
mass
pairs
gravity
1.
and
forces
such as
when they are
7.
2.
they
generate
which is a
force of
attraction
motion
between two
objects with
can be measure by
4.
8.
3.
describes
which is a
measure
of
relates force,
mass and
describes
forces in
5.
6.

Answers

Wait am I supposed to pick which one is right?

Why does a slinky wave eventually stop? Where did the energy go?

Answers

Answer:

Grades ... gravity affects them and the potential energy is converted into kinetic energy. Watching a Slinky move down the stairs or vibrating while ... and kinetic energy, and finally into sound waves.

Explanation:

Answer:

A wave as seen above will start losing energy by transferring it to kinetic and rotational energy at the shallow bottom including sand transfers, which finally will become heat (extra kinetic energy). ... In the end all energy will end up as a higher temperature in the region and ground than if the ocean were calm.

Explanation:

plz mark me has brainlist

is 468km per minute describing speed or velocity

Answers

velocity probably well that’s what i would put

When a pressure is applied to an object, the volume of the object:
a. stays the same
b. increases
c. decreases

Answers

Answer:

C because at higher altitude the air density becomes smaller

A una temperatura de 329°K una placa de aluminio tiene un área de 15 m2, si su temperatura disminuye hasta 288°K; ¿Cuál es el valor de su área final?

Answers

Answer:

El área final de la placa de aluminio es 14.971 metros cuadrados.

Explanation:

Para pequeñas deformaciones, la expresión para la dilatación de área es la siguiente:

[tex]A_{f} = A_{o} \cdot [1+2\cdot \alpha \cdot (T_{f}-T_{o})][/tex] (1)

Donde:

[tex]A_{o}[/tex], [tex]A_{f}[/tex] - Áreas inicial y final de la placa, medidas en metros cuadrados.

[tex]\alpha[/tex] - Coeficiente de expansión lineal, medido en [tex]\frac{1}{K}[/tex].

[tex]T_{o}[/tex], [tex]T_{f}[/tex] - Temperaturas inicial y final de la placa, medidas en Kelvin.

Si sabemos que [tex]A_{o} = 15\,m^{2}[/tex], [tex]\alpha = 23\times 10^{-6}\,\frac{1}{K}[/tex], [tex]T_{o} = 329\,K[/tex] y [tex]T_{f} = 288\,K[/tex], entonces el área final de la placa es:

[tex]A_{f} = (15\,m^{2})\cdot \left[1+2\cdot \left(23\times 10^{-6}\,\frac{1}{K} \right)\cdot (288\,K-329\,K)\right][/tex]

[tex]A_{f} = 14.971\,m^{2}[/tex]

El área final de la placa de aluminio es 14.971 metros cuadrados.

pls help brainliest if correct

Answers

Hmm lets see.. I think its

Mechanical---->Mechanical---->Electrical

So mechanical from the water, Then mechanical again from the wheel then through the wire which is electrical and it turns the fan on.

The gravitational potential energy decreases and the kinetic energy increases. The gravitational potential energy is transformed into kinetic energy as the ball rolls down the ramp.

A. The gravitational potential energy decreases and the kinetic energy increases. The gravitational potential energy is transformed into kinetic energy as the ball rolls down the ramp.

B. The gravitational potential energy decreases and the kinetic energy increases.As soon as the ball starts moving it no longer has gravitational potential energy; it has only kinetic energy.

C. The kinetic energy and and gravitational potential energy both decrease. Both forms of energy are used up as the ball moves and are not transformed into any other form of energy.

D. The gravitational potential energy and the kinetic energy both stay the same. One form of energy cannot be transformed into a different form of energy.​

Answers

Answer:

The gravitational potential energy decreases and the kinetic energy increases. The gravitational potential energy is transformed into kinetic energy as the ball rolls down the ramp.

Explanation:

The gravitational potential energy is the energy due to the position of a body above the ground.

Kinetic energy is the energy due to the motion of a body.

From the law of conservation of energy "energy is neither created nor destroyed but transformed from one form to another".

As the ball rolls down the ramp, the potential energy at the height is converted to kinetic energy.

I need help immediately and thank you of if you answer the question

Answers

Answer:

c. Position C

Explanation:

As the magnetic force is the strongest at the end of the poles and it decreases when it comes to its centre.

Please write ONE complete sentence describing the relationship between Kinetic Energy and Gravitational Potential Energy in a system
where energy is conserved:

Answers

Answer:

Explanation:

The sum of kinetic and potential energy is the mechanical energy of the system. Assuming the energy of the system is conserved, which it is in your case, then the initial mechanical energy will equal the final mechanical energy. This relationship is very useful in mechanics.

Why does a ball not bounce back up to its original height?

Answers

Answer:

Gravity

Explanation:

Please explain in detail and step by step ​

Answers

Explanation:

Irfan should take care that the mirror has to be 1/2 of his height and it is

there is not any other specification to be looked at and irfan's height is 180 cm

Why do farmers need to use strategies like crop rotation?

Answers

Answer:

Crops drain the soil of nutrients

Explanation:

i took the test:) yw

Please help!!!

What do all of the inventors discussed in this lesson have in common?
All of the inventors can be characterized as problem-solvers.
O All of the inventors created new things as children.
All of the inventors used engineering principles to create new things.
O All of the inventors needed mathematics principles to formulate solutions.

Answers

Answer:

All of the inventors can be characterized as problem-solvers.

Explanation:

Took the practice

Answer:

All of the inventors can be characterized as problem-solvers.

Explanation:

how many electrons does a neutral atom of the element oxygen have?

Answers

Answer:

8 electrons

Explanation:

Now you can figure out how many electrons, protons and neutrons Oxygen has: Atomic number (which is always the smaller of the two numbers) is 8. Hence 8 protons. Because the atom is neutral, there are also 8 electrons.

SOME ONE PLZ HELP WILL GIVE THE BRAINIEST

Answers

Answer:

I. 90%

II. 60 MW

Explanation:

From the question given above, the following data were obtained:

Power input = 600 MW

Power output = 540 MW

I. Determination of the efficiency.

Power input = 600 MW

Power output = 540 MW

Efficiency =?

Efficiency = output / input × 100

Efficiency = 540 / 600 × 100

Efficiency = 90%

II. Determination of the power wasted by the pump.

Power input = 600 MW

Power output = 540 MW

Power wasted =?

Power wasted = Power input – Power output

Power wasted = 600 – 540

Power wasted = 60 MW

Can someone help me with this question

Answers

Answer:

extrusive igneous rock

most likely intrusive since the magma is inside the earth not above it.

Making a forecast of what will happen in the future based on past experience or evidence is called
a.
observing.
c.
predicting.
b.
inferring.
d.
classifying.

Answers

Answer: c

Explanation:

that would be c. predicting

If the current is 10 amps and the voltage source is 200 volts,
what is the resistance?

Answers

Answer:

4,000

Explanation:

Answer:

2000

Explanation:

How much is the pressure exerted at a point where a ball- pointed pen of area 1mm 2 is pushed against the paper with a force of 24 N

Answers

Answer:

Please find the attached pdf

Explanation:

You drop a rock down a well that is 31 m deep. How long does it take the rock
to hit the bottom of the well?
A. 1.9 s
B. 2.7 s
C. 6.3 s
D. 2.5 s

Answers

It’s (A) I’m not really sure

Help ASAP
Frank uses a bowling ball to demonstrate how energy can cause changes. Which
of the following actions would NOT demonstrate a change caused by applying
energy to the ball?
O He spins the bowling ball with one hand
O He rolls the bowling ball across the floor
O He holds the bowling ball in both hands
He lifts the bowling ball to place it on a shelf.

Answers

Answer:

he holds the ball in both hands

Explanation:

he's not moving the ball

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