Planets move around the sun in elliptical orbits.
A. true
B. false

Answer:

True

Explanation:

Final answer:

A static electric charge can be released as a spark, a brief and intense discharge of electrical energy that occurs when the accumulated charge overcomes resistance of the insulating medium.

Explanation:

A static electric charge can be released as a spark. Static electricity is the accumulation of electric charge on the surface of an object, and this arrangement of charge remains static until it finds a pathway to discharge. When static charge accumulates to a sufficient level, it can overcome the dielectric (insulating) medium separating it from a neighboring conductor or the ground. At that point, the charge can suddenly move towards the conductor, releasing energy in the form of a spark that can also create light and heat. This is analogous to what happens in a spark plug of a gas engine, where a high electric field is created to ignite the fuel-air mixture or like the sudden discharge of lightning from storm clouds.

The option suggesting the release of a gas is incorrect as the discharge does not involve the creation of new chemical substances like a gas, but rather the movement of existing charge. Also, while the spark can generate heat, it is not solely released as heat, and it does not constitute a continuous current because it is a quick, transient event.

Answer: B,C,F

Explanation:

the picture of proof

Answer:

b c f is right

Explanation:

Answer:

A. person in roller coaster

Explanation:

Answer:

in men it is the Urethra.. it is not the same in woman but that is the most likely, I do not know of any of them being right but i may be wrong.

Explanation:

Answer:

mgh₁ + ½mv₁² = mgh₂ + ½mv₂²

Explanation:

Initial total energy = final total energy

PE₁ + KE₁ = PE₂ + KE₂

mgh₁ + ½mv₁² = mgh₂ + ½mv₂²

Answer:

No

Explanation:

I don't think the universe has a starting and ending point because the universe is vast and has not been fully discovered. I think that the universe is endless because all of the stars, planets, and galaxy's have yet to be found and the end or start of the universe is also yet to be discovered so I think that the universe could go on forever.

The universe's starting point is believed to be the Big Bang about 13.8 billion years ago, but whether it has an ending point is still unknown.

The question of whether the universe has a starting point and ending point is a topic explored in the field of physics. According to the Big Bang theory, the universe began with a singularity approximately 13.8 billion years ago. However, it is currently unknown whether the universe will have an ending point.

One theory suggests that the universe will continue expanding forever, gradually growing colder and darker. Another theory proposes the possibility of a Big Crunch, where the universe would eventually collapse in on itself. Some scientists also speculate about the possibility of a cyclical universe, where the cycle of expansion and contraction repeats indefinitely.

It's important to note that these theories are still being studied and researched, and our understanding of the universe's origins and potential ending is continually evolving.

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Answer:

[tex]f=9.9269\,\,10^{19} Hz[/tex]

Explanation:

Recall that the velocity (v) of a light wave is defined as the product of its frequency (f)  times its wavelength ([tex]\lambda[/tex]) :

[tex]v=f*\lambda[/tex]

therefore, we can solve for the unknown frequency by dividing both sides of the equation by the frequency:

[tex]v=f*\lambda\\2.99\,\,10^{8} \frac{m}{s} = f *\,3.012\,\,10^{-12}\, m\\\frac{2.99\,\,10^8}{3.012\,\,10^{-12}} \frac{1}{s}=f\\ f=0.99269\,\,10^{20}\,\, \frac{1}{s}\\[/tex]

Since the units "1/second" are what we call Hertz (Hz), the answer can also be given as:

[tex]f=9.9269\,\,10^{19} Hz\,[/tex]

Answer:

f=9.93 × 1019 Hz

Explanation:

Use the relationship  f=vλ  to solve for frequency f. Substituting the known quantities yields:

f=vλf=2.99 × 108  m/s3.012 × 10-12 mf=9.926×1019  

answer rounded off to 3 significant digits is

f=9.93 × 1019 Hz

Answer: Height

Explanation:

Height is the term that refers to the vertical distance from the bottom to the topmost part of any object. i.e

- a person height tells how tall he/she is,

- a building height tells the distance from ground level to the highest part.

Hence, height is measured in metres.

Answer:

Explanation:

Speed of light in a medium = speed of light in vacuum  / refractive index

= 3 x 10⁸ / 1.52

= 1.97 x 10⁸ m /s .

Final answer:

The speed of light in a material with an index of refraction of 1.52, calculated from the given formula v = c/n, is approximately 1.97 x 10⁸ m/s.

Explanation:

The question asks for the speed of light in a material given its index of refraction is 1.52, using the speed of light in a vacuum as 3.00 x 10⁸ m/s. The index of refraction (n) is defined by the equation n = c/v, where c is the speed of light in vacuum, and v is the speed of light in the material. Hence, to find the speed of light in the material, we rearrange the formula to v = c/n.

Given c = 3.00 x 10⁸ m/s and n = 1.52, we calculate:
v = 3.00 x 10⁸ m/s / 1.52 = 1.97 x 10⁸ m/s

Therefore, the speed of light in a material with an index of refraction of 1.52 is approximately 1.97 x 10⁸ m/s.

Answer:

A. 49

Explanation:

It is always nice to draw a free body diagram to visualize what is going on. (Or that is what my physics teacher told me haha)

Since you are given F=mg, you can substitute your given values (g=-9.8 and m=0.5) to solve for force.

F = -9.8 x 0.5 = -4.9 N

Then substitute -4.9 N and your given displacement (x=0.1) into your given equation to solve for the spring constant (k).

-4.9=-k(0.1) = -4.9/0.1 = -49

-49 = -k, so -49/-1 = 49

k=49

Answer: 552.5 watts

Explanation:

Given that,

Weight of man = 956 N

Height (h) = 2.41 m

Time taken (t) = 4.17 seconds

Power = ?

Recall that power is the rate of work done per unit time i.e Power = work/time

Thus, power = (mgh) / t

(Since weight = mass x acceleration due to gravity)

Power = (weight x height)/ time

Power = (956N x 2.41 m) / 4.17s

Power = 2303.96/4.17

Power = 552.5 watts

Thus, 552.5 watts of power is generated.

Answer:

I have no clues what this means.....

Explanation:

I would be glad to help if you actually put a question.

Answer:

15 17 19 21 23 25 27 29 31 33 35 37 39 41

Explanation:

Answer: Equal force

Explanation:

Answer:

nonpolar

Explanation:

Because no polar is a molecule like cholesterol

Non-polar solute is least likely to dissolve in water. So, the correct option is (C).

A polar solute is defined as one that dissolves only in a polar solvent such that water is a polar solvent and polar solute can readily dissolve in water while non polar solute is defined as a molecule whose constituents There is no net charge on the atoms where non-polar solvents such as organic solvents dissolve non-polar molecules, as in some organic compounds.

Polar solutes molecules are the molecules with polar bonds are usually asymmetrical while Non-polar molecules are the molecules with non- polar bonds which are usually symmetrical.

Thus, Non-polar solute is least likely to dissolve in water. So, the correct option is (C).

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Answer:

Stars create new elements in their cores by squeezing elements together in a process called nuclear fusion.

Explanation:

Final answer:

Elements in stars are formed through nuclear fusion, where hydrogen fuses into helium. Stars with masses above 8 solar masses can create elements up to iron through nucleosynthesis.

Explanation:

Elements are formed in stars through the process of nuclear fusion. This occurs when a star's core temperature exceeds 10 to 12 million K, allowing hydrogen nuclei to fuse into helium - a stage known as hydrogen burning. As stars evolve, those with masses greater than about 8 solar masses undergo nuclear reactions involving carbon, oxygen, and other elements, synthesizing new elements up to iron, a process known as nucleosynthesis. In late stages of a star's life, massive stars either explode as supernovae or shed their outer layers, ejecting these heavy elements into interstellar space.

The ejected matter then becomes part of the raw material for new star formation, leading to successive generations of stars with higher proportions of these heavy elements. The elements that are essential to life on Earth, such as carbon, oxygen, nitrogen, and iron, were produced in the cores of stars or the dramatic finale of supernovae. Meanwhile, lighter elements like lithium, beryllium, and boron are less abundant when compared to heavy elements such as iron in stars, indicating that heavier elements are built up over time through stellar processes.

Answer:

Answer is C

Explanation:

Brainliest please I really need it

Answer:

They will push apart because they have the same charges

Answer:

b. they can be observed and measured

Explanation:

Matter is anything that has weight and occupy space. There are three states of matter namely Solid, liquid and gas.

The properties of matter are both physical and chemical in nature. Both properties can be measured and observed. Phhysical properties are anything that can be measured without changing the state of the matter. Example of physical properties includes mass, volume, length, color etc.

Chemical properties is another properties of matter. This is the ability of the states of matters to combine with other substance to form a new product for example, rusting of iron, formation of salt etc.

All this as discussed are both measurable and can be observed.

Answer:

1. Generator

2. Direct current  

Explanation:  

1.   The Generator is a device that uses energy of motion in a magnetic field to produce electric current.  It converts mechanical energy into electrical energy.  

2. The direct current or DC is the current in which charges flow in one direction. When there is continuous flow of electron tp the positive side from the negative side through a conducting material then the current is said to be  Direct current.

Final answer:

A car traveling at 120 km/h will have 9 times more kinetic energy than if it were traveling at 40 km/h, due to the kinetic energy being proportional to the velocity squared.

Explanation:

When a car is traveling 120 km/h, it will have 9 times more kinetic energy than if it were traveling at 40 km/h. This is because kinetic energy (KE) is proportional to the square of the velocity (v), as represented by the formula KE = 1/2 mv².

Given that the speed increases from 40 km/h to 120 km/h, which is a factor of 3 (120/40 = 3), and knowing the square relationship, we square this factor (3² = 9) to find that the kinetic energy increases by a factor of 9. Thus, a car traveling at 120 km/h has 9 times the kinetic energy of the same car traveling at 40 km/h, illustrating the substantial impact of speed on kinetic energy.

Answer:

more than

less

Explanation:

The power of a car engine is far more than the power of a bicycle because a car engine does the same amount of work in less time.

Energy transfer or conversion rate expressed in terms of power. The watt, which is equal to one joule per second in the SI Units, is the unit of power. Power may also be referred to as activity in earlier writings. A scalar concept is power.

Power is correlated with other factors; for instance, the gripping force on the tires and the vehicle's velocity are the product to determine the power required to move a ground vehicle. A motor's output power is calculated as the sum of the torque it produces and the angular speed of its output shaft.

As we know that the car and other vehicles are powered by machines but on the other side bicycles, carts, etc. are operated by human force, so the power of car engine is more than bicycle, and it does the same work in less time as compared to bicycle.

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The location an electron can occupy around the nucleus depends on the electron's energy or the energy level in which it is present.

Electrons present in an atom revolve in different orbits which are stationary states and are also called as energy levels. The energy levels are numbered as integers which are also called as principal quantum numbers.

Energy of the stationary state is given as E= -R

1/n² where R

is the Rydberg's constant. When an electron is excited, and it moves from lower to higher energy levels there is absorption of energy, while when it moves from higher energy level to lower energy level it radiates or gives out energy in the form of radiation.

They can also be defined as the distances between electron and nucleus of an atom . Electrons present in K energy level have least energy .Energy level diagrams are studied to understand nature of bonding , placement of electrons in orbits and and elemental behavior under certain conditions.

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Final answer:

The location an electron can occupy around the nucleus depends on its energy. Electrons are described as occupying regions of space called orbitals, and these orbitals are determined by the electron's energy. The energy levels of the orbitals are primarily determined by the principal quantum number and the electrostatic potential produced by the nucleus and other electrons.

Explanation:

The location an electron can occupy around the nucleus depends on the electron's energy. In the current model of the atom, electrons are described as occupying regions of space called orbitals, which are determined by their energies. The energy levels of the orbitals are primarily determined by the principal quantum number and the electrostatic potential produced by the nucleus and other electrons.

Answer:

40 A, current is from B to A

Explanation:

The current in a wire is defined as:

[tex]I=\frac{q}{t}[/tex]

where

q is the amount of charge passing a given point of the wire in a time interval t

The charge passing through a given point can be written as

[tex]q=Ne[/tex]

where

N is the number of electrons

[tex]e=1.6\cdot 10^{-19}C[/tex] is the charge of one electron

So we can rewrite the equation as

[tex]I=\frac{Ne}{t}[/tex]

In this problem:

[tex]N=25\cdot 10^{21}[/tex] is the number of electrons

t = 100 s is the time interval

Substituting, we find the current:

[tex]I=\frac{(25\cdot 10^{21})(1.6\cdot 10^{-19})}{100}=40 A[/tex]

Moreover, the direction of a current is defined as the direction of positive charges moving. Here, the charge carriers are electrons (which are negatively charged), so the direction of the current is opposite to the direction of motion of the electrons: therefore, since the electrons move from A to B, the direction of the current is from B to A.

The answer is B - Current Y has a greater potential difference, and the charges flow at a slower rate.

I just took the quiz

The current X and Y share the relationship where Current Y has a greater potential difference, and the charges flow at a slower rate. Option B

Generally, a flow of electricity is caused by the directed movement of electrically charged particles.

In conclusion, for a  3-column table with 2 rows titled Electric Currents. The first column labeled Current has entries X, Y. we say that Current Y has a greater potential difference, and the charges flow at a slower rate.

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Answer:

The acceleration is 0.

Explanation:

The formula for acceleration is:

a = (v-u)/t

If v and u are equal, thus it would be 0 when subtracted, and anything divided by 0 is 0.

Answer:

The velocity of the composite body is 0.99m/s 63.43° west of north.

Explanation:

Here the law of conservation of energy says that

[tex](1).\: \: m_1v_1cos(0)+m_2v_2cos(90^o)=(m_1+m_2)v_f cos(\theta)[/tex]

[tex](2).\: \: m_1v_1sin(0)+m_2v_2sin(90^o)=(m_1+m_2)v_f sin(\theta)[/tex]

where [tex]v_f[/tex] is the final velocity if the composite body, and [tex]\theta[/tex] is measured from west of north.

Putting in numbers and simplifying the above equation we get:

[tex](3).\: \: m_1v_1=(m_1+m_2)v_f cos(\theta)[/tex]

[tex](4).\: \: m_2v_2=(m_1+m_2)v_f sin(\theta)[/tex]

dividing equation (4) by (3) gives

[tex]\dfrac{ m_2v_2=(m_1+m_2)v_f sin(\theta)}{ m_1v_1=(m_1+m_2)v_f cos(\theta)}[/tex]

[tex]\dfrac{m_2v_2}{m_1v_1} = \dfrac{sin(\theta)}{ cos(\theta)}[/tex]

[tex](5).\: \: tan(\theta) = \dfrac{m_2v_2}{m_1v_1}[/tex]

putting in [tex]m_1 = 0.5kg[/tex], [tex]v_1 = 4m/s[/tex], [tex]m_2 = 4kg[/tex], and [tex]v_2 = 1m/s[/tex] we get:

[tex]tan(\theta) = \dfrac{(4kg)(1m/s)}{(0.5kg)(4m/s)}[/tex]

[tex]\boxed{\theta = 63.43^o}[/tex]

Thus, the final velocity [tex]v_f[/tex] we get from equation (3) is:

[tex]v_f=\dfrac{m_1v_1}{(m_1+m_2)cos(\theta)}[/tex]

[tex]v_f=\dfrac{(0.5kg)(4m/s)}{(4kg+0.5kg)cos(63.43^o)}[/tex]

[tex]\boxed{v_f = 0.99m/s}[/tex]

Thus, the velocity of the composite body is 0.99m/s 63.43° west of north.

The three components used to a light bulb to light is wire, light bulb, and battery(power supply)

Explanation:

Answer:

the answer is b

Explanation:

Answer:

Direct sunlight reaches the Earth's surface when there is no cloud cover between the sun and the Earth, while cloud cover causes indirect sunlight to reach the surface. In gardening, sunlight falling directly on the plant is direct sunlight, while indirect sunlight refers to shaded areas.

Explanation:

The Sun's rays can be either direct or indirect based on the Earth's rotation and tilt on its axis. The rays are more direct when the Earth tilts towards the Sun causing summer, and more indirect when the Earth tilts away from the Sun, causing winter.

The Sun's rays can be direct or indirect based on the rotation and tilt of the Earth on its axis. When the Earth's tilt angles towards the Sun, the rays hit the Earth more directly, typically causing summer. On the other hand, when the Earth's tilt angles away from the Sun, the rays have to pass through more of the Earth's atmosphere because they are coming in at an angle, so these rays are more indirect, causing winter. In simple words, whether the Sun's rays are direct or indirect is primarily caused by the way Earth tilts and rotates around the Sun.

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