If temp. gets cold resistance in thermostat increases so voltage across it increases AND LED lights brighter. I understand everything except that for LED. It emits light when current passes through it, but if resistance increases how can current increase???​

-45N because you add the side together and make it equal 0

Kiley and Germaine pull together, resulting in a force of 45N which pulls the rope that way ===> .

In order to balance the forces on the rope, Gunther must pull the rope with a force of 45N this way  <===, all by himself.

The net force on the rope will then be zero, and the rope will not accelerate.  (Although the tension inside the rope will be 90N.)

By the way . . . I'd love to see how the kids manage to all get on the "sides" of the rope.  I would have expected them to just do it the easy way and stand at the "ends" of the rope.

The centripetal acceleration is related to the tangential velocity according to the equation below.  

a=v²/r where v is the tangential velocity and r the radius of the circular path.

thus v²=a×r

From the question provided, r=6m acceleration= 3.6m/s²

Therefore using these values in the formula v²=a×r

v=√(3.6×6)

v=√21.6

v=4.65

The answer is A. 4.65 m/s

Answer:

[tex]1.66\cdot 10^5 Pa[/tex]

Explanation:

The ideal gas equation states that:

[tex]pV=nRT[/tex]

where

p is the gas pressure

V is the gas volume

n is the number of moles of the gas

R is the gas constant

T is the absolute temperature of the gas

For the gas in this problem, we have:

[tex]n = 3 mol[/tex] (number of moles)

[tex]V=60 L=60\cdot 10^{-3} m^3[/tex] (gas volume)

[tex]T=400 K[/tex]

So we can solve the formula for p, the pressure of the gas:

[tex]p=\frac{nRT}{V}=\frac{(3 mol)(8.314 J/mol K)(400 K)}{60\cdot 10^{-3} m^3}=1.66\cdot 10^5 Pa[/tex]

It would be 7.22 degrees Celsius.

Steps: (45°F − 32) × 5/9 = 7.222°C

Answer:

The answer is Z

Explanation:

One

d = 400 m

t =   20 s

speed = ?

speed = 400 / 20

speed = 20 meters/second

Two

d = 50 meters

t =  10 seconds

speed = 50 meters / 10 seconds

speed = 5 meters / second

The efficiency of a machine increases as the temperature inside increases relative to the temperature outside.

Answer:

The correct answer is increases.

Explanation:

According to the second principle of thermodynamics, when two objects at different temperatures come into thermal contact with each other, thermal energy always flows from the hottest object to the coldest.

Therefore we deduce that if the inside temperature of the machine is higher than the outside temperature, the machine will have a higher efficiency.

Have a nice day!

Check the combination of the horses, review them, you'll get the answer.

The large container warms slower than the smaller container because of the amount of space . Both can warm to the same temperature tho just one takes longer than the other . Can I please be marked as brainliest! Have a great day !

The larger container warms up slower than the small one

the first one is the answer

Answer:

a

Explanation:

Courtney should carry out an acid-base titration, adding a known concentration of an acid or base to the unknown solution until neutrality is achieved, indicated by a colour change in an indicator or a pH measurement. Acids produce H3O+ or H+ ions, while bases produce OH- ions. The volume of known solution added to reach neutrality can help determine the nature and strength of the unknown solution.

For Courtney to determine whether an unknown chemical solution is an acid or a base, she should perform an acid-base titration. In this process, a solution of an acid or base with a known concentration, often referred to as the titrant, is slowly added to the solution with an unknown concentration, the analyte, until neutrality has been achieved. Indicator substances such as phenolphthalein, which changes colour based on pH, or a pH meter can be used to determine when this point of neutrality, called the equivalence point, has been reached.

For instance, if Courtney had a known concentration of sodium hydroxide (NaOH), a base, she would add this to the unknown solution until her phenolphthalein indicator changes colour, indicating all the acid in the solution had been neutralised. The amount of NaOH added helps determine whether the unknown solution was acidic, and to what degree.

It's important to remember that acids produce H3O+ or H+ ions in a solution, while bases produce OH- ions. This knowledge can also aid in further understanding of the titration results.

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Human dignity and worth and social justice are TWO OF THE BASIC VALUES OF THE CODE OF ETHICS FOR SOCIAL WORK.

Social workers are those professionals, who promote social change by helping to relieve hardship and suffering. Social work is committed to five basic values, which are:

1. Human dignity  and worth

2. Social justice

3.  Service to humanity

4. Integrity

5. Competence.

The human dignity and self worth value holds that all human beings have intrinsic value, right to well being, right to self fulfillment and control over their own lives.

The social justice value states that there should be fair and equitable distribution of resources to meet basic human needs and all citizens should have access to public resources in order to achieve full potential.

According to the Law of Universal Gravitation (applying to all things in the universe, hence "universal"), all objects attract each other through gravitational force. ... As mass increases, gravity increases (related linearly) because there is a stronger attraction between objects with more "stuff" (matter).

A.) Electromagnetic Current

please mark me as the brainliest

C is the correct answer. Opposites attract!

In choice C, the two magnets are closer together so it wouldn't have much attractive force. Whereas, in choice D, the two magnets are further apart so it might have the greatest attractive force.

If I were you, I would choose D, but I suck at school so it probably isn't D.

If I can't open the lid of a jelly jar, I'd keep trying and if I can't open the lid of a jelly jar after the MANY tries I took, I'd ask for help.

Hit in the center of the top, and it will let some air out, that will make it easier.

Answer:

option B

−1.92 m/s2

Explanation:

Given in the question,

time took by truck to slow down = 3.56 sec

initial speed of truck = 112 km/h

final speed of truck = 87.4 km/h

1 km/h = 0.277778 m/s

112 = 31.1 m/s

87.4 = 24.28 m/s

Formula use to calculate the acceleration

v - u = at

where v is final speed

           u is initial speed

           a is acceleration

           t is time

plug values in the equation

24.28 - 31.1 = a(3.56)

-6.8 = a(3.56)

a = -6.8 / 3.56

a = -1.9 m/s²

Final answer:

Builders should be concerned about erosion, mass wasting, and slope instability when constructing homes on cliffs, with particular risks including landslides and tsunamis arising from geological vulnerabilities and ocean dynamics.

Explanation:

The builder of a house on a cliff overlooking the ocean should be concerned about geologic phenomena such as erosion and mass wasting processes. Ocean waves incessantly weather away at the land, creating sea cliffs that become prime areas for concerns about stability. Particularly, the undercutting action of the sea can lead to portions of the cliff collapsing, and additional mass wasting can occur as higher rocks calve off. Notably, the construction of buildings on steep slopes can influence nearby slope instability due to changes in drainage, which further compounds these concerns.

Geologic factors such as rock bedding, fracturing, and foliation are structural weaknesses that can be exacerbated by this process, increasing the risk of landslides. Furthermore, when building in coastal areas, one must also consider the potential risk from tsunamis, such as the hypothesized collapse of volcanic island slopes that could generate massive waves. Thus, attention to elements like coastal erosion, wave-cut platforms, and tectonic activity is crucial during the planning and building phase to mitigate potential disasters.

The theory is A. continental drift.

The lithosphere which is the outermost layer of the planet is broken into pieces called tectonic plates. In this scientific theory called plate tectonics, seven large and greater number of small plates are broken and moved separately. This theory is based on the concept of continental drift.  

In the geologic time, continents shift their position from the earth's surface. Similar fossils found on different continent's shores prove us that the continental drift is nothing but truth.

the friction would cause the box to move slower

Answer:

A. Highly viscous and associated with violent eruptions

Explanation:

Most silica rich magma have high viscosity and huge amount of trapped gases within them. As they continue to upwell and expand, the gases causes violent eruptions near Volcanoes. Most granitic/rhyolitic magma are silica rich.

Answer: Option (A)

Explanation: Silica rich magma are those in which the magma has more than 65 % of silica content. The higher the silica content, the higher is its viscosity i.e viscosity of a magma is directly proportional to the silica content of magma.

This highly viscous magma inside the volcanoes moves sluggishly and mostly gets concentrated in the vents and seals them. With time, when the pressure exerted by the magma is too high, it creates violent eruptions through the vents.

Thus, the correct answer is option (A).

Explanation:

Given that,

Input force on a simple machine, F = 2 N

The output force on a simple machines, F' = 4 N

The ratio of the output force to the input force of any simple machines is called its mechanical advantage. Mathematically, it is given by :

[tex]m=\dfrac{F'}{F}[/tex]

Putting the value of F and F' in above equation. We get :

[tex]m=\dfrac{4}{2}[/tex]

m = 2

So, the mechanical advantage of the simple machines is 2. Hence, this is the required solution.

Answer:

Mechanical advantage, m = 2

Explanation:

Given that,

The input force on a simple machine, [tex]F_i=2\ N[/tex]

The output force on a simple machine, [tex]F_o=4\ N[/tex]

To find,

The mechanical advantage of the simple machine.

Solution,

The ratio of the output force to the input force of any simple machines is called its mechanical advantage. Its expression is given by the below formula :

[tex]m=\dfrac{F_o}{F_i}[/tex]

[tex]m=\dfrac{4}{2}[/tex]

m = 2

Therefore, the mechanical advantage of the simple machines is 2.

Answer:The answer is B

Explanation:

A generator produces electricity. Energy enters the system (generator) as kinetic energy. It is converted into electrical energy, which can run electrical appliances. Some energy is always wasted as heat and sound. Therefore, Choice B is the best answer.

Answer:

B

Explanation:

it shows the best answer

All you have to do is get the culmative effect of the forces by predicting the direction in which each object will move. Just write down what you know and put down questions for your teacher.

A is the correct answer

The most appropriate title would be " New Planet Discovered in Binary Star System ".

This title doesn't have enough glitz and glamour to be the headline of the same information in a newspaper ... as they say, it wouldn't "sell papers".  So a headline writer would have to make up a gripping, understandable, grabbing, popular, slightly misleading headline for it.

But the kind of people who read Nature don't need to be baited or tricked into reading something.  They're already interested in the subject, and they may be people who work in researching it.  They read that journal to keep up with what's happening with things they're already interested in.

Remember ... part of the modern Scientific Method is to let other scientists know all about what you're doing and what you're finding.  Nature is one of the places where real scientists do that.

Answer:

New Planet Discovered in Binary Star System

Explanation:

Answer;

The above statement is True

Kinetic friction is affected by the weight of the object.

            F= coefficient of friction * Normal force.

              F = mass* acceleration due to gravity.

Answer:

The answer is True. Friction is indeed affected by weight.

Explanation:

D because any answer to volume has to be cubed.

I think the true option is "The sun uses its own matter to create light and heat."

Answer:

 - The sun uses its own matter to create light and heat.          

Explanation:

Sun is composed of gases majorly Hydrogen and Helium. In the core, the hydrogen atoms fuse to form helium atoms. This nuclear fusion reaction in the core produces huge amount of energy in the form of heat and light.

Thus, the statement that sun uses its own matter to create light and heat is true.

Sun is a G2 star. It is not a rare star. It is appears extremely bright because it is closer to earth. Else, it has a average brightness.

When we look at the sun, we actually view the photosphere. chromosphere is only visible during a total solar eclipse.

The sun would eventually die and in this process, it would become red giant expand and engulf the earth. Finally its core would form a white dwarf.

It should be the first answer. I'm sorry if it's wrong

Coal production is costly because coal is found deep underground, necessitating expensive mining operations. Corrent answers are 1.coal is found deep underground, 2. Coal is expensive to make and  3. Coal is only found in certain places on earth.

Coal production is costly primarily because coal is found deep underground. This necessitates extensive and expensive mining operations to extract the coal.

There are two main methods of coal mining:

Furthermore, transporting the mined coal to power plants or industrial sites adds to the cost. Lastly, coal processing, which involves cleaning and removing impurities, adds another layer of expense.

Corrent answers are 1.coal is found deep underground, 2. Coal is expensive to make and  3. Coal is only found in certain places on earth.