When a 10-V battery is connected to a resistor, the current in the resistor is 2 A. What is the resistor's value

Answer: "Most of the light waves are reflected", might be the correct answer.

Explanation: it might be the correct answer because the light waves spread out from the source in all directions, and upon striking a mirror, are reflected at an angle determined by the angle at which the light arrives. The reflection process inverts each wave back-to-front, which is why a reverse image is observed.

Answer:

most light waves are reflected

explanation:

when light hits a mirror it bounces back at the same angle it hit this is called reflection refraction on the other hand Refraction is the bending of light

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Refraction is the bending of light

Average acceleration is the change in velocity with time.
Acceleration takes place when velocity changes with time. Velocity being a vector quantity may change in magnitude or direction any of the change results to acceleration

The pace at which a body's velocity varies is represented by average acceleration, which is a vector quantity.

The rate of change of velocity with respect to time is known as acceleration. According to Newton's second law, the eventual effect of all forces applied to a body is its acceleration.

The formula for acceleration is;

[tex]\rm a = \frac{v-u}{t}[/tex]

u is the initial speed

v is the final speed

t is the time interval

a is the acceleration of ball

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The work done in moving a block across a rough surface and the heat energy gained by the block can both be measured in Joules.

Joules is a unit of measurement used in physics that indicates the force exerted on a particular object.

A Joule is a work when a force that equals one (1) newton moves an object one (1) meter in a given direction.

Joules is the most widely extended unit of force and energy in physics and related disciplines.

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Answer:

Explanation:

There are a few conditions as mentioned:  "you walked down an empty hallway and heard the echo of your footsteps." So first thing is as you walk, your shoes touch the floor and make noises.  Those are sounds of your footsteps.  You are in a hallway so the sounds are trapped within the hallway.  It is empty so there is nothing like people who would block and absorb the sounds. With sounds bouncing around walls and floor of the hallway, they bounce back to the source: you. That is when you hear the echo of your footsteps.

The work done by the man pushing the car over the given distance is 1000J.

Given the data in the question;

Work done; [tex]W = \ ?[/tex]

Work done is simply defined as the energy transfer that takes place when an object is either pushed or pulled over a certain distance by an external force. It is expressed as;

[tex]Work\ done = f * d[/tex]

Where f is force applied and d is distance travelled.

To determine the work done by the man, we first solve for the force applied F.

From Newton's Second Law; [tex]Force \ F = m * a[/tex]

We substitute our given values into the expression

[tex]F = m * a \\\\F = 200kg * 0.5m/s^2\\\\F = 100kg.m/s^2[/tex]

Next we substitute our values into the expression of work done above.

[tex]Work \ done = f * d\\\\Work \ done = 100kg.m/s^2 * 10m\\\\Work \ done = 1000kgm^2/s^2\\\\Work \ done = 1000J[/tex]

Therefore, the work done by the man pushing the car over the given distance is 1000J.

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Answer:

400N

Explanation:

Newton's second law of motion

F = ma

20 x 20 = F

F = 400

Answer:

hydropower and nucear energy

Explanation:

Examples of these include hydropower, fossil fuel-based power, nuclear energy, and solar thermal power plants, among others. Almost all major power plants generate alternating current, as do diesel generators

The distance is the object from the mirror will be 5cm.

A mirror equation is an equation that relates object distance and image distance to focal length. It is often referred to as a mirror formula.

The object distance in a spherical mirror is the distance between the object and the pole of the mirror (u).

The given data in the problem is;

Image height = 18cm

Object height = 10cm

u is the object distance

v is the image distance = 9 cm

From the symmetry of the triangle;

[tex]\frac{image \ height }{object \ height} = \frac{v}{u} \\\\ \frac{18 }{10} = \frac{9}{u}\\\\ \rm u=\frac{90}{8} \\\\ u = 5\ cm[/tex],

Hence the distance is the object from the mirror will be 5cm.

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Answer:

200,000 joules <3

Explanation:
just accept it

Answer:

[tex]2.00 * 10^5J[/tex]

Explanation:

Make use of your conversion factors:

[tex]200KJ * \frac{1000J}{1kJ} = 200,000J = 2.00* 10 ^5J[/tex]

Or alternatively make use of your scientific notation. [tex]kilo = 10^3[/tex]

Therefore [tex]200kJ = 200*10^3J=2.0*10^2*10^3J = 2.0*10^5J[/tex]

Hi there!

Recall that:
[tex]\Delta V = -\int\limits^a_b {E \cdot } \, dx[/tex]

Given an electric field, the potential difference can be solved by using integration. Similarly:
[tex]E = -\frac{dV}{dx}[/tex]

We can differentiate the electric potential equation to solve for the electric field.

Use the power rule:
[tex]\frac{dy}{dx} x^n = nx^{n - 1}[/tex]

Differentiate the given equation.

[tex]-\frac{dV}{dx}\frac{7}{x^2} =- \frac{dV}{dx}7x^{-2} = -(-14x^{-3}) = \frac{14}{x^3}[/tex]

Or:
[tex]\boxed{E(x) = \frac{14}{x^3}}[/tex]

The component of the electric field in that region is E = 14/x³ if the electric potential in a region is given by v(x)=7/x2

An electric field is an electric property that is connected with any location in space where a charge exists in any form. The electric force per unit charge is another term for an electric field.

We have:

The electric potential in a region is given by:

[tex]\rm V(x) = \frac{7}{x^2}[/tex]

We know the relation between potential difference and an electric field is given by:

[tex]\rm \triangle V = \int\limits^a_b {E.} \, dx[/tex]

If the electric field is given, then:

[tex]\rm E = -\frac{dV}{dx}[/tex]

[tex]\rm E = -\frac{d(7x^{-2} )}{dx}[/tex]

After differentiate:

[tex]\rm E = -(-14x^{-3})[/tex]  or

[tex]\rm E = \frac{14}{x^3}[/tex]

Thus, the component of the electric field in that region is E = 14/x³ if the electric potential in a region is given by v(x)=7/x2

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Answer:

The equation of equilibrium at the top of the vertical circle is:

\Sigma F = - N - m\cdot g = - m \cdot \frac{v^{2}}{R}

The speed experimented by the car is:

\frac{N}{m}+g=\frac{v^{2}}{R}

v = \sqrt{R\cdot (\frac{N}{m}+g) }

v = \sqrt{(5\,m)\cdot (\frac{6\,N}{0.8\,kg} +9.807\,\frac{kg}{m^{2}} )}

v\approx 9.302\,\frac{m}{s}

The equation of equilibrium at the bottom of the vertical circle is:

\Sigma F = N - m\cdot g = m \cdot \frac{v^{2}}{R}

The normal force on the car when it is at the bottom of the track is:

N=m\cdot (\frac{v^{2}}{R}+g )

N = (0.8\,kg)\cdot \left(\frac{(9.302\,\frac{m}{s} )^{2}}{5\,m}+ 9.807\,\frac{m}{s^{2}} \right)

N=21.690\,N

Answer:

I think it's Experimental

Explanation:

it has atoms on it.

Answer:

D

Explanation:

It is a physical model.

Option D is not a critical skill for participating in a sport.

Sport refers to any competitive physical activity or game[1] that intends to utilize, maintain, or enhance physical ability and skills while also giving enjoyment to players and, in certain situations, entertainment to spectators.

Agility and balance are crucial in sports such as soccer, especially when players dribble the ball at rapid speeds.

Endurance and muscular control are critical in sports such as gymnastics and boxing.

Hand-eye coordination and acuity are essential in sports like golf.

Hence Option D is not a critical skill for participating in a sport.

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Answer:

D

Explanation

This one is leisure for people with common sense. Yellow is an assortment of two of the rudimentary colors, red and green. Yellow appears yellow because red light is being imaged in our eyes, so that's one thing. Green reflections are capable of being enthralled by the shirt; hopefully, this should be meticulous adequate for you to have a basic understanding of this "phenomenon". Cheers!

A yellow T-shirt appear yellow to human eye because it reflects both red and green lights and our eye detects it as a combination of two fundamental colors (red and green), which is yellow.

Color is a perception. Our eyes sense something (the sky, for instance), and information is transferred from our eyes to our brains informing us that it is a particular color (blue). Different combinations of wavelengths of light are reflected by objects. When our brains detect certain wavelength combinations, they transform them into the phenomena known as color.

There has three fundamental color: red, blue and green. Red and green lights are combined to create yellow light. If a shirt reflects both red and green light, it appears yellow to human eyes. These two fundamental colors of light must be present in the incident light for red and green light to reflect yellow light to human mind.

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Answer:

Wavelength = 3.74 m

Explanation:

In order to find wavelength in "metres", we must first convert megahertz to hertz.

1 MHz = 1 × 10⁶ Hz

80.3 Mhz = x

x = 80.3 × 1 × 10⁶ = 8.03 × 10⁷ Hz

The formula between wave speed, frequency and wavelength is:

v = fλ  [where v is wave speed, f is frequency and λ is wavelength]

Reorganise the equation and make λ the subject.

λ = v ÷ f

λ = (3 × 10⁸) ÷ (8.03 × 10⁷)

λ = 3.74 m [rounded to 3 significant figures]

The range of wavelengths that are received by the car radio are 2.78 m to 3.41 m.

To find the range of wavelengths, we use the equation for the speed of a wave

The speed of a wave v = fλ where

This is the distance a wave travels in one cycle of the wave.

Making λ subject of the formula, we have

λ = v/f

Given that the range of frequencies of FM radio is 88.0 MHz to 108 MHz and

λ' = v/f'

= 3 × 10⁸ m/s ÷ 88.0 × 10⁶ Hz

= 0.0341 × 10² m

= 3.41 m

λ" = v/f"

= 3 × 10⁸ m/s ÷ 108 × 10⁶ Hz

= 0.0278 × 10² m

= 2.78 m

So, the range of wavelengths that are received by the car radio are 2.78 m to 3.41 m.

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Answer:

B, A, A, B

Explanation:

Just trust me on this one.

The answer will be A The forces are balanced. Force is an external agent applied on any object to displace it from its position. Force is a vector quantity, so with magnitude it also requires direction.

Force is an external agent applied on any object to displace it from its position. Force is a vector quantity, so with magnitude it also requires direction. Direction is necessary to examine the effect of the force and to find the equilibrium of the force.

The length of each arrow represents the magnitude of each force, while the direction of each arrow represents the direction of each force.

From the diagram, we see that the four arrows have all same length: this means that the four forces have same magnitude, therefore they are balanced in pair. In fact:

On the vertical direction, the normal reaction ([tex]F_N[/tex]) balances the weight of the box ([tex]F_g[/tex])

On the horizontal direction, the push ([tex]F_P[/tex]) balances the force of friction ([tex]F_f[/tex])

Hence the answer will be A. the forces are balanced.

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Answer:

A is your answer.

Explanation:

Good luck on your exam!

Answer:

I believe if red, blue, and green light come together it would produce White light.

Answer:

you get a light white

Explanation:

Assuming g=10N

upward force=600N(applied force)

downward force=(W)=(5x10)=50N

net force=600-50

=550N

F=(delta)P/t

(delta)P=m (v-u)

u=0m/s

(delta)P=mv

550=(5)(v)/0.1

550x0.1

55=5v

v=11m/s

there was no mention of any gravity acting on the object only applied force ,infact we aren't even given the constant

so many assumptions have been made whyyyyyyy!!!

what's your take on it scientists

Answer:

what is your question

Explanation:

I dont see where you are asking a question be specific lol

: )

Answer:

7.9 x 10^21 pound-force

Explanation:

The average distance between the Earth and sun is 150 trillion meters, or 1.5 x 10^11 meters. The mass of the sun is 1.99 x 10^30 kilograms, while the Earth weighs in at 6.0 x 10^24 kilograms. The gravitational constant is 6.67 x 10^-11 meter^3 / (kilogram - second^2). So the Earth and sun pull on each other with a force equal to 3.52 x 10^22 newtons. The newton is a unit of force equal to a kilogram-meter/second^2. One newton is equal to 0.22 of the rarely used English unit called pound-force, so 3.52 x 10^22 newtons is 7.9 x 10^21 pound-force.

Answer:

the current of 12 ohm is 2A

Answer:

1.In dry cells, manganese dioxide acts as a ‘depolariser'.

In the depolarization process, the depolariser is used to remove hydrogen and doesn't allow the voltage to get reduced due to polarisation of the cell . Manganese oxide was used as a depolariser in Leclanché cell .

In zinc-carbon dry cell, the manganese dioxide takes in electrons as it is converted to Manganese III oxide (Mn2O3)

2.The fuse breaks the circuit if a fault in an appliance causes too much current flow. This protects the wiring and the appliance if something goes wrong. The fuse contains a piece of wire that melts easily. If the current going through the fuse is too great, the wire heats up until it melts and breaks the circuit.

Answer:

Only main sequence stars have a well-defined relationship between spectral type and luminosity.

Explanation:

Low-mass stars have much longer lifetimes than high-mass stars.

Answer:

Per is a Latin preposition that means "through" or "by means of". Per (pronounced like "purr") is also an English preposition that can mean "for each", "to each", "by means of", or [lastly, annoyingly] "in accordance with"; somewhat interchangeably with the [even more annoying] "as per". In the example expressions here, it conveys "because of the rationale presented at/by".

Answer:

(Entry 1 of 4) 1 : by the means or agency of : through per bearer. 2 : with respect to every member of a specified group : for each. 3 : according to —often used with as per instructionsas per usual.

Explanation:

Answer:

Remember a few key things:

1.) Oil comes from plants, but also animals

2.) When heat lamps are done or useless, they go to landfills

3.) Things in landfills go back to the environment after a few years or even decades.

4.) Sometimes there are all-natural oils for heat lamps

Answer:

a because they are bigger and have more mass wich means that they will fall faster because there is more weight going downward...

Explanation:

Beluga

Answer:

Explanation:

It depends on whether this is a "trick" question.

The law of universal gravitation says that the attractive force between two objects depends directly on their masses and inversely to the square of distance in between them.

As the objects in A are bigger than B, they MAY have higher masses. So the force is larger in A.

But no information is given about object mass or density. The distance between objects in B is shorter. So if the objects in B have the same masses those in A, then the force is larger in B.

Answer:

The Moon orbits Earth once every 27.3 days and spins on its axis once every 27.3 days. This means that although the Moon is rotating, it always keeps one face toward us. Known as “synchronous rotation,” this is why we only ever see the Moon's nearside from Earth.

I hope this helps you out

Light travels in straight lines

Light is a form of energy.

Light travels in waves.