What examples can you find in your home that are examples of kinetic and potential energy name two for each

Answer:

a

Explanation:

The synthetic polymers are often used in place of natural materials Because synthetic polymers are cheaper than natural polymers, and natural polymers are also less plentiful.

Any of the groups of organic or synthetic compounds known as polymers are made up of macromolecules, or very large molecules, which are just multiples of simpler chemical building blocks known as monomers. Numerous natural and man-made materials, as well as a large portion of the components in living things, are composed of polymers.

Scientists and engineers use petroleum oil to create synthetic polymers. Nylon, polyethylene, polyester, Teflon, and epoxy are some examples of artificial polymers. It is possible to extract natural polymers from the environment. They frequently consist of water.

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To find the absolute temperature of the air at -70 degree\C, convert the Celsius temperature to Kelvin by adding 273.15, resulting in an absolute temperature of 203.15 K.

The question is seeking the absolute temperature of the air, which requires converting the given Celsius temperature to Kelvin. The absolute zero is -273.15 degree\C on the Celsius scale, which corresponds to 0 K on the Kelvin scale. To convert -70 degree\C to Kelvin, you add 273.15:

-70 degree\C + 273.15 = 203.15 K

Therefore, the absolute temperature of the air in the container is 203.15 Kelvin.

Answer: 400 J

Explanation :

Given that,

Force = 100 N

Distance  = 6 m - 2 m = 4 m

Now , the work done is equal to the multiplication of the force and distance.

W = F * d

[tex]W = 100\ N\times 4\ m[/tex]

[tex]W = 400 J[/tex]

Hence, the quantity of work done is 400 J

Answer:400j!

Explanation:

Answer:

Power  = 1600Watts

Explanation:

Power is given by the rate of energy expended or work done by a body (or object).

Power = [tex]\frac{Workdone}{time}[/tex]

Where;

Workdone = Force x distance

=> Power = Force x distance / time   -----------------------(i)

According to the question,

Force = 8000N

distance = 4m

time = 20 s

Substitute these values into equation (i) above

=> Power = 8000 x 4 / 20

=> Power = 1600Watts

Therefore the  power of the tow truck is 1600Watts

Answer:

C

Explanation:

Answer:

It is C.

Because of his theory water turns into air of a process called evaporation.

And im giving credit to the guy above his awswer

Answer:When the distance between the balls decreases, the size of the arrows increases. This shows that the gravitational pull between the balls also increases.

Explanation:

Edmentum

Answer:

[tex]n_f=2[/tex]

Explanation:

It is given that,

Initially, the electron is in n = 7 energy level. When it relaxes to a lower energy level, emitting light of 397 nm. We need to find the value of n for the level to which the electron relaxed. It can be calculate using the formula as :

[tex]\dfrac{1}{\lambda}=R(\dfrac{1}{n_f^2}-\dfrac{1}{n_i^2})[/tex]

[tex]\dfrac{1}{397\times 10^{-9}\ m}=R(\dfrac{1}{n_f^2}-\dfrac{1}{(7)^2})[/tex]

R = Rydberg constant, [tex]R=1.097\times 10^7\ m^{-1}[/tex]

[tex]\dfrac{1}{397\times 10^{-9}\ m}=1.097\times 10^7\ m^{-1}\times (\dfrac{1}{n_f^2}-\dfrac{1}{(7)^2})[/tex]

Solving above equation we get the value of final n is,

[tex]n_f=2.04[/tex]

or

[tex]n_f=2[/tex]

So, it will relax in the n = 2. Hence, this is the required solution.        

The electron relaxes to energy level n = 2

[tex]\texttt{ }[/tex]

The term of package of electromagnetic wave radiation energy was first introduced by Max Planck. He termed it with photons with the magnitude is :

[tex]\large {\boxed {E = h \times f}}[/tex]

E = Energi of A Photon ( Joule )

h = Planck's Constant ( 6.63 × 10⁻³⁴ Js )

f = Frequency of Eletromagnetic Wave ( Hz )

[tex]\texttt{ }[/tex]

The photoelectric effect is an effect in which electrons are released from the metal surface when illuminated by electromagnetic waves with large enough of radiation energy.

[tex]\large {\boxed {E = \frac{1}{2}mv^2 + \Phi}}[/tex]

[tex]\large {\boxed {E = qV + \Phi}}[/tex]

E = Energi of A Photon ( Joule )

m = Mass of an Electron ( kg )

v = Electron Release Speed ( m/s )

Ф = Work Function of Metal ( Joule )

q = Charge of an Electron ( Coulomb )

V = Stopping Potential ( Volt )

Let us now tackle the problem !

[tex]\texttt{ }[/tex]

Given:

initial shell = n₁ = 7

wavelength = λ = 397 nm = 3.97 × 10⁻⁷ m

Unknown:

final shell = n₂ = ?

Solution:

We will use this following formula to solve this problem:

[tex]\Delta E = R (\frac{1}{(n_2)^2} - \frac{1}{(n_1)^2})[/tex]

[tex]h \frac{c}{\lambda} = R (\frac{1}{(n_2)^2} - \frac{1}{(n_1)^2})[/tex]

[tex]6.63 \times 10^{-34} \frac{3 \times 10^8}{3.97 \times 10^{-7}} = 2.18 \times 10^{-18} \times ( \frac{1}{(n_2)^2} - \frac{1}{7^2})[/tex]

[tex]5.01008 \times 10^{-19} = 2.18 \times 10^{-18} \times ( \frac{1}{(n_2)^2} - \frac{1}{7^2})[/tex]

[tex]( \frac{1}{(n_2)^2} - \frac{1}{7^2}) = \frac{45}{196}[/tex]

[tex]\frac{1}{(n_2)^2} = \frac{1}{49} + \frac{45}{196}[/tex]

[tex]\frac{1}{(n_2)^2} = \frac{1}{4}[/tex]

[tex]n_2)^2 = 4[/tex]

[tex]n_2 = \sqrt{4}[/tex]

[tex]\boxed{n_2 = 2}[/tex]

[tex]\texttt{ }[/tex]

[tex]\texttt{ }[/tex]

Grade: College

Subject: Physics

Chapter: Quantum Physics

Option (d) is correct. A pair of scissors is a compound machine.

Further Explanation:

A machine is a device that is used to reduce the human effort and obtain much more output as compared to the input given. A simple lever that is used to lift a load is also a machine as it reduces the human effort.

A simple machine is a machine that has only one machine. For example, a ramp is an inclined plane that helps to cover a height easily. A lever is also a simple machine that is used to multiply the effort to pick up the heavier loads.

A ramp, a wheel and axle and a pulley all are the simple machines. They have only one simple machine in them whereas a pair of scissors is not a simple machine as it has more than one machine in it.

Thus, Option (d) is correct. A pair of scissors is a compound machine.

Learn More:

Answer Details:

Grade: Middle School

Chapter: Machines

Subject: Physics

Keywords: Simple machine, compound machine, ramp, wheel and axle, pair of scissors, human efforts, lever, inclined plane.

The Compound machines from the given options is a pair of scissors.

The correct option is D.

Compound machines are mechanical devices composed of two or more simple machines working together to perform a specific task. These machines leverage the principles of simple machines, such as levers, pulleys, and gears, to multiply or redirect force, making it easier to perform work. Compound machines can be found in various applications, from complex industrial machinery to everyday tools like bicycles and cars. They illustrate the concept that combining simple machines can enhance mechanical efficiency and enable humans to accomplish tasks that would otherwise be challenging or impossible.

The compound machine from the given options is a pair of scissors.

A compound machine is a combination of two or more simple machines, which are devices that make work easier by reducing the required force or changing the direction of force. In the case of scissors, they consist of a lever and a wedge. The handles of the scissors act as a lever, while the blades function as wedges.

Therefore, option d, a pair of scissors is the correct answer.

Hence The correct option is D.

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Electric current. The source of all magnetism is electric current, both at macroscopic and microscopic levels, responsible for phenomena including Earth's magnetic field and ferromagnetism.

The source of all magnetism is electric current. This includes both macroscopic currents, such as those flowing through a wire, and microscopic currents, such as those associated with electrons orbiting an atomic nucleus or the spin of subatomic particles like protons and electrons. In the case of Earth's magnetic field, it is mostly generated by electric currents in the planet's molten outer core. In common materials, magnetism arises from the internal cooperative alignment of electron spins, a phenomenon known as ferromagnetism. The relationship between electricity and magnetism is such that separate north and south magnetic poles, or magnetic monopoles, do not exist; instead, magnetic effects are always due to the presence of electric currents forming magnetic dipoles.

Answer:

B. Energy

Explanation: To pull an electron of outer shell of atom less energy is required. Because work done in pulling electron from outer shell is less( as attraction is weak  ) in comparison to work done in pulling an electron from inner shell ( attraction with nucleus is strong). The energy needed to pull out an electron from an atom can be explained by ionization energy. Which means farther the electron is from the nucleus more energy it has.

Answer:

B 70 inches

Explanation:

In a stem plot the numbers on the left side of the line are called the stem and the value on the right side are called the leaves. The stem represents the tens place while the leaves represent the ones place of a number.

The height of the students are as follows:

52  55  55  56  59

62  64  67  67

70  71

It can be seen that 70 inches is the height of one of the students.

Answer:

Momentum (P) = Mass (kg) * Velocity (m/s)

P = M * V

P = 50 * 5

P = 250

So momentum is 250 kgm/s

Explanation:

Answer:

The red ball

Explanation:

The red ball has greater kinetic energy, because it has a greater mass.

the correct answer is C. ductile.

Talia needs a ductile material for wire manufacturing, and copper is an example with high tensile strength and superior conductivity, making it suitable for electrical wiring.

Talia requires a material that is ductile for manufacturing rolls of wire for hanging pictures. Ductility is a key characteristic of certain metals that allows them to be drawn into thin wires without breaking. Copper is a prime example of a ductile material, and in addition to its ductility, copper is known for having a high tensile strength and being a very good conductor of electricity due to its low resistivity. These properties make copper an excellent choice for electrical wiring, though other materials like aluminium and gold are also used for specific applications due to their unique advantages, such as aluminium's lower weight and gold's resistance to corrosion.

The potential at point a is 2V, and the potential at point b is 6V.

The circuit has two voltage sources (9V and 6V) and two resistors (2Ω and 1Ω).

To find the potential at point a (the upper right corner), we can use the voltage divider formula: V_a = (6V × 1Ω) / (1Ω + 2Ω) = 2V

To find the potential at point b (the lower left corner), we can again use the voltage divider formula: V_b = (9V × 2Ω) / (1Ω + 2Ω) = 6V

If we changed the 1Ω resistor to a different value, it would affect the voltage drop across it, and therefore the voltage at point b. For example, if the bottom resistor was 0.5Ω instead of 1Ω, the voltage at point b would be higher than 6V. also if the bottom resistor was 2Ω instead of 1Ω, the voltage at point b would be lower than 6V.

Answer:

The kinetic energy (K) of the system before the collision equals K after.

Explanation:

An elastic collision is a collision in which there is no net loss in kinetic energy from the system as a result of the collision. The amount of motion and the kinetic energy are conserved quantities in elastic collisions. This means that the kinetic energy (K) of the system before the collision equals K after.

Some collisions between atoms in gases are examples of perfectly elastic collisions.

Answer:

B

Explanation:

A is incorrect because intensity is dependent on the amplitude not on the frequency.

B is correct because intensity is the amount of energy a wave carries per second.

C is incorrect because intensity is not how well a sound travels through a medium.

The correct answer to the question is B. warm to cold.

EXPLANATION:

Before coming into any conclusion, first we have to understand radiation and conduction.

Radiation is the type of mode of transmission of thermal energy in which the radiations travels through space or vacuum without heating the intervening medium.

On the other hand, conduction is the mode of transmission of heat from one body to another body which are in contact with each other or hotter part to the colder parts of a body without any transport of material particle.

Heat always flows from a body at higher temperature to a body at a lower temperature in absence of external work done. The reverse is not possible in normal case.

Hence, the correct option will be B . It is so because heat is flowing  from hot body to cold body, and there is no direct contact between the body. It explains correctly the mode of transmission of thermal energy through the process of radiations.

Radiation is the transfer of thermal energy without needing a material medium, like how the Sun's heat and light reaches the Earth through the vacuum of space.

Radiation is the process by which thermal energy is transferred from one place to another without the need for a material medium. This is different from conduction and convection, which are other forms of heat transfer. A good example of this type of thermal energy transfer would be the energy we receive from the sun. The sun emits energy in the form of light and heat, which then travels through the vacuum of space to reach the Earth. The fact that this energy can travel through a vacuum, where there are no air molecules to conduct or convict the heat, demonstrates how radiation works. This is the best illustration of how radiation transfers thermal energy.

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Answer: B. development of female sex

Development of female sex characteristic is not associated with the amount of cortisol in the body.

Explanation:

Cortisol is a steroid hormone secreted by the adrenal gland. It facilitates stress response, regulates blood sugar level and helps fight infections. High cortisol level leads to Cushing syndrome and low cortisol level leads to Addison disease.

Obesity is a  symptom of Cushing syndrome while weight loss is a symptom of Addison disease. Thus levels of cortisol can affect body weight as well.  When in a stressful situation, our body pumps excess cortisol.

Cortisol level in our body is generally high in the mornings and low in the midnight.

Answer:

B. development of female sex characteristics

Explanation:

Cortisol is known as "Stress Hormone" for the reason that it is secreted in response to the stress. But it is more than just stress hormone and has a lot of other functions too.

It is made in the Adrenal glands. Almost all the body cells have cortisol receptors. This hormone helps in regulating blood pressure, blood sugar levels, metabolism of the body and fight infections. High levels of cortisol will result in "Cushing Syndrome" and low level of cortisol will result in "Addison disease". People with "Cushing Syndrome" gain weight rapidly while people with Addison Disease will lose weight rapidly.

The development of female sex characteristics doesn't depend on cortisol. It depends on the absence of Testosterone. If testosterone is present the fetus will develop into a male else a female.