PLEASE HELP I WILL GIVE MAX POINTS

My answer is  D but I will still try to word it out again

Answer:D

Explanation:

Hope it helps

Answer:

Explanation:

The variables we know and are given are:

time, t = 20s

Charge, Q = 3x1-^-6 electrons, which is just 3x10^-6C (C stands for Coulombs, which is the unit for Charge)

We need to find the current, I, and since we know Q and t we can substitute these values into the given equation:

I=Q/t (which if you look at what the RHS is saying, its Charge over time, or more literally means the amount of charge passing a point over a period of time)

If we substitute these values, we will get I as:

I = Q / t

I = 3x10^-6 / 20

I = 1.5x10^-7 A

Hope this helps!

Answer:

solar panels

Explanation:

Answer:

Power, P = 30 W

Explanation:

We have,

Voltage drop of a circuit is 60 V

Resistance of the resistor is 120 ohms

Current across the circuit is 0.5 A

It is required to find the power conducted by the resistor. Power conducted by a resistor is given by :

[tex]P=VI[/tex]

V and I are voltage and current

[tex]P=60\times 0.5\\\\P=30\ W[/tex]

So, the power conducted by the resistor is 30 watts.

Answer:

D.  30.0 W

Explanation:

Quiz Taken

Answer:

i want to say all of the above but not sure

Explanation:

Answer:

All of the above

Explanation:

Answer: C

Explanation:

Answer:

A is the correct answer

Explanation:

just did the test

The correct answer is option A. The wavelength decreases by a factor of 2.

Wavelength is the distance between the crests of waves or a person's general attitude. An example of wavelength is the distance between the crest of two waves. An example of wavelength is when you and another person share the same general attitude and can thus communicate well. The distance between crests of a wave.

Both Wave 1 and Wave 2 have the same wavelength but different amplitudes. The wavelength of light is an important property for it is this that determines the nature of the light. Red light has a different wavelength from that of blue light and green light has a different wavelength from both of them.

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Answer:

38.52g

Explanation:

Answer:

34.24g

Explanation:

for study island said I got it correct.

Answer: The answer is B

Explanation:

The Earth has an atmosphere rich in nitrogen (78%) and oxygen (20%). Aerospace engineers have designed systems that supply astronauts with air that is very similar in composition to Earth's atmosphere. This means that the air fed into spacecraft is mostly nitrogen and oxygen.

The correct statement is " The Earth has an atmosphere rich in nitrogen and oxygen." The correct option is D.

The Earth's atmosphere is rich in nitrogen (about 78%) and oxygen (about 21%), with trace amounts of other gases. This atmosphere provides a number of benefits that are critical for human spaceflight, including:

Protection from solar radiation: The Earth's atmosphere shields us from harmful solar radiation, which can cause DNA damage and increase the risk of cancer. Without this protection, astronauts would be at a much higher risk of radiation sickness and other health problems.

Regulation of temperature: The Earth's atmosphere helps to regulate the planet's temperature by trapping heat from the sun and preventing it from escaping into space. In the absence of an atmosphere, spacecraft would rapidly heat up or cool down, making it difficult to maintain a comfortable temperature for human occupants.

Breathing air: The Earth's atmosphere provides a ready source of breathable air, which is essential for human life. By imitating the composition of the Earth's atmosphere inside a spacecraft, astronauts can breathe comfortably without the need for bulky oxygen tanks or other life support systems.

In contrast, the other options are not unique features of the Earth's environment that are critical for human spaceflight:

A. The Earth has a strong magnetic field: While the Earth's magnetic field provides some protection from solar radiation, it is not essential for human spaceflight. In fact, spacecraft often use the lack of a magnetic field in space to perform scientific experiments that would be difficult or impossible to conduct on Earth.

B. The Earth has an atmosphere rich in carbon dioxide and hydrogen: While carbon dioxide and hydrogen are important components of the Earth's atmosphere, they are not critical for human spaceflight. In fact, carbon dioxide is often considered a pollutant that must be removed from the air inside a spacecraft, while hydrogen is a highly flammable gas that poses a safety risk.

C. The Earth has a strong gravitational field: While gravity is certainly important for human spaceflight, it is not unique to the Earth's environment. In fact, spacecraft can simulate the effects of gravity using centrifugal force, and some proposals for long-duration space missions involve using artificial gravity to counteract the negative effects of zero gravity on the human body.

Therefore, The correct option is D. The Earth has an atmosphere rich in nitrogen and oxygen.

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Answer:

The angle the light ray makes as it strikes the surface.

Explanation:

When describing image formation in lenses, the angle of incidence is the angle the light ray makes as it leaves the surface.

The angle with which the light ray is falling on the surface, measured from the horizontal s called the angle of incidence.

Thus, when describing image formation in lenses, the angle of incidence is the angle the light ray makes as it leaves the surface.

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Answer:

the answer is when heat gets transfered through objects  that are touching when the measurement of heat in the yeans

Explanation:

The Option that explains the process of radiation is :  ( C ) when heat gets transferred through electromagnetic waves that move through space

Radiation is the transfer of energy through space in the form of electromagnetic waves or as subatomic particles. Energies transferred during radiation move at the speed of light.

During conduction and convection heat gets transferred through objects that touch each other while during radiation the objects do not have to be in contact for energy to be transferred.

Hence we can conclude that The Option that explains the process of radiation is when heat gets transferred through electromagnetic waves that move through space

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The wavelength of the given light is required.

The wavelength of the light is [tex]2\times 10^{-4}\ \text{m}[/tex]

v = Velocity of light = [tex]3\times 10^8\ \text{m/s}[/tex]

f = Frequency = [tex]1.5\times 10^{12}\ \text{Hz}[/tex]

Wavelength is given by

[tex]\lambda=\dfrac{v}{f}[/tex]

[tex]\Rightarrow \lambda=\dfrac{3\times 10^8}{1.5\times 10^{12}}[/tex]

[tex]\Rightarrow \lambda=2\times 10^{-4}\ \text{m}[/tex]

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The wavelength of the light is 2.00 × [tex]10^{-4 }[/tex]meters.The correct option is Option B ( 2.00 × [tex]10^{-4 }[/tex] meters ).

To find the wavelength of a beam of light traveling through a vacuum with a frequency of 1.5 × [tex]10^{12}[/tex] Hz, we use the equation that relates the speed of light (c), frequency (f), and wavelength (λ):

Given that the speed of light in a vacuum (c) is 3.00 × [tex]10^8[/tex] m/s, we rearrange the equation to solve for wavelength (λ):

Therefore, the wavelength of the light is 2.00 × [tex]10^{-4}[/tex] meters.

Both devices would require the same amount of force. Therefore, the correct option is option C among all the given options.

A force in physics is an effect that changes the velocity of a mass-moving object, causing it to accelerate from rest, for example. It is a vector quantity since it can be a push or perhaps a pull and always has magnitude and direction. It is denoted by the letter F and is measured in newtons (N), the SI unit of force (formerly P).

The net force exerted on an object approximately equal to the rate where its momentum varies over time, according to Newton's second law in its original formulation. Both devices would require the same amount of force.

Therefore, the correct option is option C among all the given options.

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Final answer:

Without specific sizes of the wheel and axle radii, it's not possible to determine which wheel and axle would require less force to drag a load; hence, the answer is 'Not enough information'.(Option D)

Explanation:

The student asked which wheel and axle would allow a load of rocks to be dragged with less force. To answer this question, it's important to understand that a wheel and axle is a form of lever that can rotate around the center of the axle. The mechanical advantage of such a device is calculated by dividing the radius of the wheel by the radius of the axle.

Without specific measurements of the wheel and axle radii provided for Option A and B, it is not possible to determine which wheel and axle configuration would require less force to drag a load of rocks. Thus, the correct answer to the question would be D. Not enough information.

Answer: It will increase

The magnetic force increases as the distance between two magnetic poles decreases due to the greater strength of the magnetic field when closer together.

As the distance between two magnetic poles decreases, the magnetic force increases. This is because the strength of the magnetic field from a magnet decreases with distance. When two magnetic objects are brought closer together, the field strength at each object due to the other's pole becomes greater, which results in a stronger magnetic force between them. The relationship between magnetic force and distance is similar to that of electric forces and can be thought of in the same way as Coulomb's Law for electric charges, where the force decreases with the square of the distance between the charges.

In practical terms, when you bring a magnet closer to a piece of iron, the magnetic potential energy of the system decreases because the magnet is moving to a lower potential energy state as it is attracted to the iron. Conversely, if you push two repelling magnets together, their magnetic potential energy increases because work is done against the repulsive force.

Final answer:

The gold releases 109,200 joules of heat as it cools from 90°C to 20°C. The specific heat capacity of gold (0.129 J/g°C) and the mass of the gold (12 kg) were used to calculate the heat transfer.

Explanation:

To calculate how much heat is given off when 12 kg of gold cools from 90°C to 20°C, we use the formula for heat transfer Q = mcΔT, where m is the mass of the substance, c is the specific heat capacity, and ΔT is the change in temperature.

First, we need the specific heat capacity of gold, which is 0.129 J/g°C. Since the mass of gold is given in kilograms, we need to convert it to grams (1 kg = 1000 g). The mass of the gold is 12000 g (12 kg * 1000 g/kg).

The change in temperature (ΔT) is the final temperature minus the initial temperature, which is 20°C - 90°C = -70°C.

Now we can calculate the heat transfer:

Q = m * c * ΔT
Q = 12000 g * 0.129 J/g°C * (-70°C)
Q = -109200 J

Negative sign indicates that the heat is released. Thus, the gold releases 109,200 joules as it cools.

The work done by the bicycle brakes is calculated by multiplying the braking force of 95 N by the stopping distance of 16 m, resulting in 1520 joules of work done.

To calculate the work done by the brakes on the bicycle, we need to use the work-energy principle. Work is defined as the force multiplied by the distance over which the force is applied, provided the force is applied in the direction of the movement. The formula for work is:

Work (W) = Force (F) times Distance (d)

In this case, the brakes apply a force of 95 N to the wheels, and the bicycle comes to a stop in 16 m. Therefore, the work done by the brakes is:

W = 95 N times 16 m = 1520 J (joules)

Since the direction of the braking force is opposite to the direction of motion, and the bicycle comes to a stop, the entire work done by the brakes is used to dissipate the bicycle's kinetic energy as heat and other forms of energy due to friction.

Answer:

object moving at a constant velocity will always have a

Zero acceleration

Answer:

Zero Acceleration

Explanation:

Correct on Edge

Answer:

two opposite poles

Explanation:

Answer:

100 units

I hope this helps you

Answer:

Supersaturated Solution (im not sure what your question was but if you're looking for the term of the definition then it should be supersaturated solution)

Explanation:

Answer:

Explanation:

A conductor's voltage determines how fast electric charges pass through it. In a circuit, electrons move around due to voltage. If there is no voltage, electrons can move in any direction.

Voltage is the correct answer.

I hope this helps you! Please let me know if my answer is wrong.

KE : 1/2mv^2

KE: 1/2 x 70(2^2)

KE: 1/2 x 70 x 4

= 1/2 x 280

280 x 1/2 = 140

Therefore, the man's kinetic energy is 140J.

The statement which best explains why the bell would not ring in this set-up is "The circuit is open." The correct option is A.

An open circuit is a circuit where the continuity has been broken, meaning there is a break in the path that the electrons travel on. This can be caused by a switch being turned off, a wire becoming disconnected, or a component in the circuit failing. Without a complete path for the electrons to flow, the circuit is considered "open" and no current can flow. As a result, any devices or components in the circuit will not function.

Here in the Question,

An electric circuit needs to be closed in order for the current to flow and for the doorbell to ring. In this setup, the wire attached to the contact screw needs to be connected to the wire attached to the steel bar in order to close the circuit. If the circuit is open, there will be no current flowing and the bell will not ring.

Option B is not correct because the electromagnet having an iron core is necessary for the doorbell to work. The electromagnet is created by the U-shaped iron core with coils of wire around it. When current flows through the wire, it creates a magnetic field that attracts the steel bar, causing the striker to hit the bell.

Option C is not correct because a closed circuit is necessary for the doorbell to work, not an open circuit.

Option D is not correct because the electromagnet needs to be made of iron or another ferromagnetic material, not steel, in order to create a strong magnetic field.

Therefore, The correct answer is Option A.

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Answer: The answer would indeed be A.

Explanation: I Hope this Helps!

Answer:

Electrical

Explanation:

She uses a battery, which is electrical.

It doesn't operate using chemicals, heat, or light

Answer:

it's chemical and electrical because she uses her circuit in which the both forms take place...........so according to me the most probably the answer is electrical.....

Explanation:

because she uses her circuit in which the both forms take place...........so according to me the most probably the answer is electrical.....

Answer:

the resistance force is mg cos(-)

Explanation:

The resistance force on an inclined plane is generated by a portion of the object's weight acting downward along the plane and the counteracting frictional force. It opposes your upward movement. The total force exerted walking up an incline is less than lifting the same weight vertically, which explains why it's easier to walk uphill than climb a ladder of the same height.

When you walk up an inclined plane, you encounter two forces due to gravity: a force acting perpendicular to the plane and a force acting parallel to the plane. The perpendicular force is typically equal in magnitude and opposite in direction to the normal force. The force acting parallel to the plane leads the object to accelerate down the incline. This is the resistance force you experience when moving up. It's composed of a part of the weight (W) inclined downward along the plane and the opposing frictional force (f). Specifically, if the incline is at an angle Θ, the resistance force, W_parallel, can be expressed as W_parallel = mg sin(Θ), where m is mass and g is the force of gravity, and the kinetic friction, f_k, can be expressed as: f_k = μ_k mg cos(Θ).

However, when walking, you work against the resistance to move forward, and hence, the net force is not zero. As a result, climbing an inclined plane is less strenuous than climbing directly upwards, though it demands work over a greater distance.

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Answer:

"Where are we?" versus "Why are we here?" is a common example. We may never be able to explain why we exist or for what purpose we exist, but we can point to a map or coordinates and produce scientific evidence of where we are.

Explanation:

What temperature a water boil is a question of science, and what purpose life serves is a question of philosophy.

What degree does water begin to boil?

The answer is that at sea level, water boils at 100 degrees Celsius (212 degrees Fahrenheit).

Because it includes a quantifiable and reproducible phenomenon, this query falls under the purview of science. It can be resolved through experimental observations and the use of scientific ideas, particularly the comprehension of the physical characteristics of water and how they alter with temperature and pressure.

What purpose does life serve?

The answer varies depending on personal ideas, values, and philosophical viewpoints.

Given that it involves arbitrary interpretations of the meaning of life and abstract notions, this question is best suited for philosophy. It goes into more profound existential and philosophical questions that science, as an approach based on empirical observation and investigation, may not be able to answer. This is an issue that requires personal reflection and introspection rather than being something that can be objectively measured or demonstrated using scientific methods because the answer may vary for many individuals and philosophical systems.

Hence, What degrees a water boil is a question of science, and what purpose life serves is a question of philosophy.

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Answer:

The surface where they slip is called the fault or fault plane. The location below the earth's surface where the earthquake starts is called the hypocenter, and the location directly above it on the surface of the earth is called the epicenter. Sometimes an earthquake has foreshocks.

Answer:

negative with respect to the other end

Explanation:

Electrons are subatomic particle which carries negative charge. They are attributed to carry the electrical charges in solids.

Since electron carries negative charge , if it flows to one end of resistor then that end will have negative charge on it. Also other end has no charge so, if we compare both the ends . End with electrical charge is negative with respect to other end .

Answer:

I think it's A. 0.008 s

Explanation:

divide 15,000 w/0.008 s

=1,875,000

Answer:

Final momentum after a head on collision is -2kgm/s

Explanation:

         One ball moves to the right and the other moves opposite  and momentum is a vector quantity so that considering the direction

Initial momenta are        P₁=2x3=6kgm/s        P₂=4x(-2)=-8kgm/s      

Final momentum is the vector sum of P(final)= 6-8= -2 kgm/s

The final momentum after a head-on collision is -2kg-m/s if the 2.0-kg ball rolls to the right at 3.0 m/s. A 4.0-kg ball rolls to the left at 2.0 m/s.

A tangible body's mass is the amount of matter it possesses. It's also a metric of inertia or the resistance to velocity when a net force is exerted.

It is given that:

A 2.0-kg ball rolls to the right at 3.0 m/s. A 4.0-kg ball rolls to the left at 2.0 m/s.

As we know,

Momentum = mass×velcoity

Given that momentum is a vector number and that one ball goes to the right while the other moves in the opposite direction

Initial momenta:        

P = 2×3

P = 6 kg-m/s        

p = 4×(-2)

p = -8 kg-m/s      

Final momentum = The vector sum of P(final)

= 6 - 8

= -2 kg-m/s

Thus, the final momentum after a head-on collision is -2kg-m/s if the 2.0-kg ball rolls to the right at 3.0 m/s. A 4.0-kg ball rolls to the left at 2.0 m/s.

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