Physics High School

in order to produce a current in a cell, the terminals must what?

a. have a potential difference
b. be exposed to light
c. be in a liquid
d. be at two different temperatures

Answers

Answer 1
A. They must have a potential difference
Potential difference is voltage and voltage is basically the thing that causes current to flow

Related Questions

What do astronomers mean when they say that the universe is isotropic?

Answers

If you stand at the center and look in every direction the universe will look the same.

Which of these is NOT large and gaseous?
A) Jupiter
B) Mercury
C) Saturn
D) Uranus

Answers

Mercury.
____________
The answer is Mercury, Because it is a small and non=gaseous  planet

hope this helped :D

If the sun were replaced by a 1-solar-mass black hole, what would be the gravitational pull of the black-hole "sun" on earth?

Answers

If the Sun were replaced by a 1-solar-mass black hole, then Earth wouldcontinue to orbit the black hole in precisely its present orbit.  The planets  would actually continue on in their orbits as if nothing had happened.
Final answer:

The gravitational pull that a 1-solar-mass black hole would exert on Earth is the same as the sun. This is because gravitational pull is determined by mass and distance. However, life on Earth would be greatly impacted due to the lack of sunlight and heat.

Explanation:

If the sun was replaced by a 1-solar-mass black hole, the gravitational pull it exerts on Earth would be the same as that of the sun. This is due to the fact that gravitational pull is determined by mass and distance. Considering the mass would be the same and the distance between Earth and the black hole would remain constant, the gravitational pull remains unaffected.

However, without the sun's light and heat, life as we know it on Earth would not be sustainable. It's also important to note that while the gravitational pull remains the same, various other aspects of having a black hole instead of a sun would drastically impact our planet.

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An arrow is shot vertically upward from a platform 33ft high at a rate of 214ft/sec. when will the arrow hit the ground? use the formula: h=−16t2+v0t+h0. (round your answer to the nearest tenth.)

Answers

Hello!

Answer:

The arrow will hit the floor in 13,5 seconds.

Explanation:

For this exercise, we have a quadratic equation that is the way (for this exercise) to calculate the time when the arrow will hit the floor, it means that the h (y) will be 0.

We have the following equation:

[tex]h=-16 t^{2} +Vo.t+h0[/tex]

This is a quadratic equation, so we are going to use the next formula:

[tex]\frac{-b+- \sqrt{ b^{2}-(4).(a).(c} }{2.(a)}[/tex]

Substituting we have:

[tex]\frac{-214+- \sqrt{ 214^{2}-(4).(-16).(33)} }{2.(-16)}[/tex]

[tex]\frac{-214+- \sqrt{ 45796+2212} }{(-32)}=\frac{-214+- \sqrt{48008} }{(-32)} \\ =\frac{-214+-219,10 }{(-32)}[/tex]

We have 2 different results,  we are looking for a positive result because we are calculating a time value. 

Then:

[tex]t1=13,52s \\ t2=-0,17s[/tex]

So, we are choosing t1 because it's the positive result.

Finally, we have that the arrow will hit the floor in 13,5 seconds approximately.

Have a great day!

A transformer has 20 turns in its primary coil and 60 turns in its secondary coil. The input voltage for the transformer is 25 volts. What is the output voltage?

Answers

As, the transformer works on the principle of mutual induction between two coils.So, according to Faraday's law,
               induced emf=-number of turns in coil *[change in flux per unit time] 
write above equation in formula form,
                               V= -N[ΔФ/Δt]  
Now, write the above equation for both primary and secondary coils of transformer and equate them(as ΔФ/Δt remains same for both of them):
we get the relation:
                                           V_{s} / V_{p}=N_{s} / N_{p}
s stands for secondary coil.
p stands for primary coil.
 By putting the values:
                                          V_{s}/25=60/20

                                           V_{s}=75volts (output voltage).[tex] [/tex]
                                          


Which type of radiation has a negative charge? alpha beta gamma which type of natural radiation is pure energy? beta alpha gamma which type of natural radiation has the most massive particles? gamma alpha beta?

Answers

Beta particles are negatively charged. Electromagnetic Radiation is pure energy (Gamma). The largest particles are alpha.

The Beta particles are negatively charged. Electromagnetic Radiation is pure energy (Gamma). The largest particles are alpha.

What is radiation?

Atomic and subatomic particles as well as waves, such as those that characterize X-rays, heat rays, and light rays, move as a result of radiation. All staff is constantly being bombarded by radiation of both types, coming from both cosmic and terrestrial sources.

This page describes the properties and behavior of radiation and the stuff it interacts with. It also describes how energy is transferred from radiation to its surroundings.

There is a lot of focus on the effects of such an energy transfer on living things, including the typical effects on several biological processes (e.g., photosynthesis in plants and vision in animals).

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A car approaches a police radar gun. how does the wavelength of the signal detected within the car compare with that emitted by the radar gun? the wavelength detected inside the car is longer. the wavelength detected inside the car might be shorter or longer depending on speed range. the wavelength detected inside the car is the same. the wavelength detected inside the car is shorter.

Answers

A car approaches a police radar gun. The wavelength detected inside the car is shorter compared with that emitted by the radar gun. If travelling at a changeable speed towards the gun, the wavelength detected inside the car might be shorter or longer depending on actual speed at any moment.

Subtitle is the half-life of an element is 10 years how many half-lives will it take before only about 6% of the original sample remains

Answers

We can solve this problem by using the equation
as shown: A=Aoe^-(ln2/t)T where A is the final amount (0.06 gram), Ao is
the initial amount (1g *assumed), t is the half-life (10 years ) and lastly T
time elapsed (required). Plug in the values in the equation and you should
get  40.5 years and this is approximately 4 half-lives.

A train travels 120 km In 2 hours and 30 minutes what’s its average speed

Answers

Formula for distance is d=st
so for speed is s=d/t 
 48 km per hour
Speed= distance / time or s=d/t.

120 / 2.5 (2.5 is 2 hours and 30 minutes.) = 48 km/h

A formation of igneous rock on earth's surface is known as ______.

Answers

A formation of igneous rocks on earth's surface is known as extrusive igneous rocks.

The rocks originated from cooled and crystallized magma flown from the volcanic eruptions on planet surfaces is called igneous rocks. They are also called magmatic rocks due to their formation from magma.

A formation of igneous rocks on the earth's surface is known as extrusive, or volcanic igneous rocks.

How igneous rocks are formed?

They can be originated in the form of intrusive or extrusive manner. The lava from volcanic eruptions causes the deposition of cooled magma on Earth surfaces and that solidifies after sometimes resulting in the formation of extrusive igneous rocks.

The extrusive igneous rocks are formed near or above planet surfaces while the intrusive forms below the planet surface because magma cools slowly in intrusive igneous formation compared to fast cooling of extrusive rock formation.

Therefore, the appearance of igneous rocks on the earth's surface is known as extrusive igneous rocks.

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Explain why sound travels faster through iron than through air

Answers

Solids have particles that are closer together than air that the sound wave can travel through.

What type of roadway has the highest number of hazards per mile?

Answers

the roadway with the highest number of hazards is city streets

The roadway with the highest number of hazards per mile is city roads and street.

The city has a high population of people, this is a combination of both men and women. These categories of people need vehicles to move around the city, they need it go to the office, school, markets and so on.

Due to the high number of individuals in the city there tend to be a high level of traffic, this can lead to accident or other type of road hazards.

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Explain how the "natural frequency" of objects must be considered/analyzed in places like concert halls and airplanes.

Answers

If you are talking about sound frequency you need to consider what area you are in because in a concert hall it is big and helps the sound spread but in an airplane it is the opposite. 

Do non metals have luster

Answers

Yes, It probably true. Because the Luster it has a nonmetal, is going to be found in periodic table.

Hope it helped you.

-Charlie

What is the frequency corresponding to a period of 8.01 s?

Answers

The frequency of an oscillation is equal to the reciprocal of the period:
[tex]f= \frac{1}{T} [/tex]
where
f is the frequency
T is the period

In our problem, the period is T=8.01 s, therefore the corresponding frequency is
[tex]f= \frac{1}{8.01 s}=0.12 s^{-1} = 0.12 Hz [/tex]
Final answer:

The frequency corresponding to a period of 8.01 seconds is calculated using the formula f = 1/T, resulting in a frequency of approximately 0.125 Hz.

Explanation:

The question relates to the concept of period and frequency in wave motion which is a topic in Physics. To find the frequency corresponding to a period of 8.01 s, you use the formula f = 1/T, where f is the frequency and T is the period. Applying this formula:

f = 1/T = 1/8.01 s ≈ 0.125 Hz

Therefore, the frequency corresponding to a period of 8.01 seconds is approximately 0.125 Hertz (Hz).

Noise caused by not understanding somebody's accent is considered:

A) semantic
B) temporal
C) internal
D)external

Answers

The answer is more likely letter A.) semantic

Answer:

semantic.

Explanation:

100% correct

What are the short eruptions of intense high-energy radiation from the sun's surface called? Corona Prominences Solar flares Sunspots

Answers

Short eruptions of intense high energy radiation from the Sun's surface are called solar flares. The appropriate answer is C. Solar flares usually does not last more than one hour. But during that time , the temperature of the solar flare region can be twice that of the rest of the sun's surface. Huge amounts of energy are released into space during a solar flare. 

The answer is Solor flare, this is because this is a sudden eruption of energy that is magnetic on or even near the surface of the star, the sun.

Hope this helps!

A 10 - kg object is dropped from rest. after falling a distance of 50 m, it has a speed of 26 m/s. how much work is done by the dissipative (air) resistive force on the object during this descent?

Answers

Using the equation of motion,

v^2 = u^2 + 2as, where v = final velocity, u = initial velocity = 0 m/s, a = acceleration = gravitational acceleration = 9.81 m/s^2, s= distance = 50 m

Therefore,

v = Sqrt (2*9.81*50) = 31.32 m/s

But, it is noted that the actual velocity is 26 m/s.

The difference between Kinetic Energies is the work done to overcome the air resistance.

That is,

Work done = 1/2*10*31.31^2 - 1/2*10*26^2 = 1/2*10 (31.32^2-26^2) = 1,525 J

The wheel and axe is a modified incline plane

A.True
B.False

Answers

B False it is not a modified incline plane
The wheel and axle is essentially a modified lever, but it can mover a load farther than a lever can. The center of the axle serves as a fulcrum.

Four springs are stretched to the same distance from the equilibrium position. The spring constants are listed in the table. Which lists the springs based on the amount of elastic potential energy, from greatest to least? X, Y, W, Z X, W, Y, Z Z, W, Y, X Z, Y, W, X

Answers

The correct answer is: X, W, Y, Z

In fact, the elastic potential energy of a spring is given by
[tex]U= \frac{1}{2}kx^2 [/tex]
where k is the spring constant and x is the stretching of the spring with respect to its rest position.

In this problem, all the four springs are stretched by the same distance x. This means that their difference in potential energy is due only to the difference between their spring constant: the larger the spring constant, the greater the energy. Therefore we can list the springs from the one with largest spring constant to the one with smallest constant, and this list corresponds to listing the springs from the one with largest energy to the one with smallest energy:
X, W, Y, Z

Answer:B

Explanation:

XWYZ

The graph shows the solubility of different compounds at different temperatures. Solubility refers to how much of something will dissolve in the given amount of water at a particular temperature. ________ shows the greatest change in solubility over the temperature range shown. A) KBr B) KNO3 C) NaCl D) NaClO3

Answers

Answer:

b

Explanation:

From the graph, it is clear that potassium nitrate, KNO₃ undergo great change in solubility over the temperature range.

What is solubility?

Solubility of a substance is the fraction of its concentration which is dissolved in a solvent at a specified temperature. Solubility of a substance is dependent on the nature of both solute and solvent.

The factors which determine the solubility of  a solute are its bond types, molecular weight, temperature and pressure. As the temperature increases, the intermolecular force attraction between solute molecules decreases leading to  solvent- solute interaction results in greater solubility.

From the graph it is clear that solubility of KNO₃ changes rapidly with temperature. Whereas , other compounds dose not show this steep curve with increase in temperature. Thus option B is correct.

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An ac generator with peak voltage 100 volts is placed across a 10-? resistor. What is the average power dissipated?

Answers

The correct answer is: Average Power  = 500 W

Explanation:
Root-mean square voltage = Vrms = Vpeak /√2 = 100 / √2 volts
Resistance = R = 10 Ω
Average power = Pavg = (Vrms)^2 / R = (100 * 100) / (2 * 10) = 500 W

Sasha uses a basketball and a tennis ball to represent two astronomical bodies based on their sizes. Which of the following representations is the most correct based on what Sasha has? The basketball represents Earth and the tennis ball represents the solar system. The basketball represents the moon and the tennis ball represents the solar system. The basketball represents the solar system and the tennis ball represents Earth. The basketball represents the solar system and the tennis ball represents the Milky Way.

Answers

If you are comparing the sizes of the astronomical bodies using the basketball and the tennis, then you can think of the basketball as the bigger astronomical body and the tennis ball the smaller one. 

If you look at your choices, you are left with the basketball represents the solar system and the tennis ball represents Earth. This is because the solar system is bigger than the Earth. 

The other choices shows the bigger astronomical bodies represented as the tennis ball. 

Answer:

C

Explanation:

im doing the test rn but i think this is right correct me if im wrong also have a good day or night

What is an outward curving lens

Answers

A concave lens is exactly the opposite with the outer surfaces curving inward, so it makes parallel light rays curve outward or diverge. 

An outward curving lens, or convex lens, converges light rays and is an essential element in optical devices like microscopes and cameras. It has a positive radius of curvature by convention. Convex lenses help correct farsightedness by focusing light rays onto a specific point.

An outward curving lens, also known as a convex lens or a converging lens, is a lens that is curved outward on both sides, resembling the intersection of two spheres. This type of lens causes parallel light rays to converge or come to a point after passing through it. The radius of curvature for a convex surface is positive by convention, which helps in the lens-maker's equation for calculating the focal length of the lens.

Convex lenses are widely used in various optical devices such as microscopes, telescopes, cameras, and eyeglasses to correct farsightedness by focusing light rays onto a specific point, resulting in a clear image.

A light bulb burns out is a chemical or physical change ?

Answers

I'm pretty sure that it's a physical change, b/c the line in the bulb blows out. I could be wrong, but I'm like 99% sure I'm right lol. Hope that helps ;)

Which organelles is used to transport materials through the cell

Answers

Hello.

The answer is cell membrane.

Have a nice day

Strictly speaking, when an object acquires a positive charge by the transfer of electrons, what happens to its mass? (think small.)

Answers

An electron is 1/1836 of the mass of the proton. So, losing that little mass (0.51 MeV/c2) or gaining it changes the overall mass, but so small that it is hard to detect. hope this helped!:)

Explain why a cow that touches an electric fence experiences a mild shock

Answers

The voltage exists between the fence and the ground.  The cow is grounded. The cow is touching the ground, completing the circuit of electricity. When the cow comes into contact with the fence, it becomes an electric ground which sends an electric current into the cow, through the cow, and into the ground. The pain experienced from the shock is due to the current that flows through the cow.

Final answer:

A cow experiences a mild shock from an electric fence because its body conducts electricity, completing a circuit to the ground, which is designed to be unpleasant but not harmful. Modern electric fences use pulsed currents to allow detachment, with safety standards keeping shocks below the harmful threshold.

Explanation:

When a cow touches an electric fence, it experiences a mild shock due to the principles of electricity and current flow in living organisms. Our bodies, similar to the cow's, are good conductors because of the high water content. This conductivity allows electric currents to flow through us, following the path of least resistance to reach the ground, often referred to as 'earthing'. Electric fences are designed to give a shock that is unpleasant but not harmful, utilizing a small current that can cause a sensation but is usually not enough to damage tissue.

Modern electric fences are now pulsed on and off to allow someone who touches them to pull away. This design is vital for safety, preventing prolonged exposure that could lead to muscular contractions strong enough to prevent letting go of the fence. Shocks from electric fences are typically below 5 mA (milliamps), which is the maximum allowed shock according to many safety standards. This threshold ensures the shock is felt but remains within a range considered to be harmless.

Additionally, the earth acts as a natural electron sink, allowing currents to dissipate safely when an individual or animal completes the circuit by touching the fence while grounded. However, insulating materials such as rubber shoes can break this path, preventing the shock, which is why electrical safety protocols often include insulating gear to prevent the flow of electrical currents through the body.

What is the focal length of a lens?

Answers

The focal length of the lens is the distance between the lens and the image sensor when the subject is in focus, usually stated in millimeters (e.g., 28 mm, 50 mm, or 100 mm). In the case of zoom lenses, both the minimum and maximum focal lengths are stated, for example 18–55 mm.

ANALOGY: Mars bar: planet as Milky Way: __________

Star cluster

Candy bar

Constellation

Galaxy

Answers

galaxy is the answer
Other Questions
Tom is a world war ii war hero who suffers from posttraumatic stress disorder and major depression. in 1954, he was sent to an institution for treatment. he was successfully cured and he reentered society to lead a normal life. he was most likely admitted to a(n) _____. Trevor just received a jar of mixed nuts containing 325 almonds, 250 pistachios, 75 cashews, and 350 pecans for his birthday. He's going to start randomly choosing some nuts from the jar, and he's not going to do anything that would favor him choosing any particular type of nut over another. Let's use this information to calculate some probabilities. (4 points: Part I - 1 point; Part II - 1 point; Part III - 1 point; Part IV - 1 point)What is the probability that the first nut Trevor chooses is a pecan?Part II: What is the probability that the first nut Trevor chooses is an almond or a cashew? The fact that many older people begin to demonstrate an interest in painting, music, or woodworking supports the idea that older people _____. are generally very bored develop an appreciation for the aesthetic still have a drive for power and prestige become less interested in being with people What condition best belongs on the chart ? Alex walked 1 mile in 15 minutes. Sally walked 3,520 yards in 24 minutes. In miles per hour, how much faster did Sally walk than Alex? (Note: 1 mile = 1,760 yards) the probability of a chance event is close to 0. which statement about the event is true/ (A) the event is likely to occur (B) the event has the same chance of occuring or not occuring (C) the event is unlikely to occur (D) the event is definately not going to occur Two students, Ann and Max, factored the trinomial 4x2 6x 4. Ann factored it as 2(x 2)(2x + 1) and Max factored it as (x 2)(4x + 2). Indicate which student factored the trinomial completely and which student did not, and explain why. What role did cyanobacteria play in the cambrian explosion? quizet? Does the Ohio constitution of 1851 allow more or less popular sovereignty I really need help with these problems What were the conditions like for the soldiers fighting in the trenches of WWI The probability of a certain hockey player making a goal after hitting a slap shot is 1/5. How many successful slap shot would you expect her to make after 120 attempts?-5-20-24-60I need help with Getting the answer! Help please! TRUE or FALSE; Voltaire believed that people by nature were good but that society corrupted them. Tracy solved the system of equations by making a substitution for x in the second equation. What equation did she get as a result of that substitution?x = 2y 2 2x + 3y = 62y 2 = 62y + 1 = 64y 2 + 3y = 64y 4 + 3y = 6 Bryant collects a set of 20 data representing the lengths of worms he found in the garden. The variance of the set of measurements is 36. What is the standard deviation from the mean? millimeters What would be a major sign of overtraining? change in appetite decrease performance loss of motivation and vigor disturbed sleep? 50 POINTS! FRENCH PROJECTIn this project, you will read the two French newspaper articles copied below. Next, you will write the answers to the questions below in French. You must write complete sentences. You may use the expressions that you find in the articles in your answers. La Joconde vole !le 22 aot 1911Hier, le tableau le plus renomm du monde a disparu du Louvre. Accroch dans le Salon Carr depuis plus de 100 ans, l'absence du tableau, La Joconde, a t remarque par les gardiens du muse qui ont notifi la police.Le muse sera ferm pendant l'enqute. De plus, le gouvernement a ferm les frontires pour s'assurer que personne ne sorte le tableau du territoire franais. La police souponne un homme qui collectionne des copies de ce tableau, mais ils ne trouvent pas encore d'indices dfinitifs.La scurit du muse du Louvre est maintenant remise en question. La police a charg l'inspecteur Louis Lpine de l'enqute. La Joconde retrouve !le 11 dcembre, 1913Aujourd'hui, la police italienne a retrouv la Joconde. Vincenzo Peruggia a t arrt aprs avoir admis l'avoir vole il y a deux ansHier, Peruggia a tent de vendre le tableau Alfredo Geri, un marchand d'art italien. Geri a livr le tableau la police, qui ont ensuite arrt Peruggia. Peruggia admet avoir vol la Joconde le 21 aot 1911 parce qu'il veut que l'art italien reste en Italie. Mais, comment l'a-t-il vol ? Peruggia, un charpentier, travaillait au muse du Louvre en 1911. Le muse l'a embauch pour faire des vitres de protection pour quelques tableaux. Le 20 aot, Peruggia et deux autres ouvriers, les frres Lancelotti, taient dans le muse, au milieu de la foule. Ils se sont cachs dans un cagibi et y sont rests jusqu' la fermeture du muse. Pendant la nuit, Peruggia a dcroch le tableau et les frres Lancelotti l'ont aid en surveillant autour de lui. Ils sont rentrs dans le cagibi jusqu'au matin puis ils se sont repartis. C'est incroyable de penser que Peruggia est sorti du muse avec le tableau sous son bras, sans tre dtect. De plus, personne n'a remarqu la disparition de suite. Il est courant de voir des cadres vides dans le muse du Louvre. Souvent, les tableaux sont dcrochs pour tre restaurs ou copis. Des tudiants copient souvent des tableaux pour s'entrainer reproduire les techniques des matres. Mais, les gardiens savaient que personne n'avait la permission de copier ni de restaurer la Joconde, donc ils ont notifi la police immdiatement. Plus de 150 gendarmes et inspecteurs ont travaill sur le dossier. Aprs le vol, la police a pos des questions Peruggia, comme chaque ouvrier, mais Peruggia a dit qu'il n'avait pas travaill au muse pendant plusieurs mois. La police n'a pas vrifi.Peruggia a gard la Joconde dans son appartement moins de deux kilomtres du Louvre pendant ces deux ans. 1.Quand le vol a-t-il eu lieu ?2.Comment s'appelaient les voleurs ?3.O les Italiens ont-ils attendu ?4.Pourquoi l'absence d'une peinture n'a-t-elle pas attir l'attention des visiteurs cette poque ?5.Qui a dcroch la peinture ?6.Trouvez deux expressions ngatives autre que "ne...pas" dans l'article.7.Combien d'inspecteurs et de gendarmes ont cherch la Joconde?8.Pendant combien d'annes la Joconde tait-elle introuvable?9.O tait la Joconde pendant cette priode?10.Qui a t arrt ?11.Pourquoi a-t-il vol la Joconde? Congress passed the tenure of office act in 1867 to How did Europe respond to the economic crisis? What might have caused this canyon to form? A) winds blowing in zig-zag way B) frequent earthquakes in the area C) water breaking the rocks into pieces D) heavy rainfall flooding the part of the land