Thunder is heard 7.2 seconds after a bolt of lightning is observed. if the speed of sound is 349 m/s, how far away did the lightning strike?

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

Answer:

B, A, A, B

Explanation:

Just trust me on this one.

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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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

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:

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

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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''When the quantity demanded intersect with quantity supplied, it leads o the formation of equilibrium point.''

The equilibrium price and equilibrium quantity occur where the supply and demand curves cross with each other. The equilibrium occurs when the quantity demanded is equal to the quantity supplied.

So we can conclude that  when the quantity demanded intersect with quantity supplied, it leads o the formation of equilibrium point.

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Equilibrium is the condition when the supply of any goods meets the demands completely. The point at which the graph intersects is the equilibrium price.

Equilibrium is the condition when the supply of any goods meets the demands completely. Therefore, no extra goods are left.

Equilibrium is the condition when the supply and the demand line cross each other on a price and quantity graph as shown below. The point at which the graph intersects is the equilibrium price.

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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]

Answer:

what is your question

Explanation:

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

: )

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!

The final velocity of the other student after the elastic collision with Logan is 6.94 m/s.

The final velocity of the other student will be determined by applying the principle of conservation of linear momentum for elastic collision.

m₁u₁ + m₂u₂ = m₁v₁ + m₂v₂

Substitute the given parameters and solve for final velocity of the other stsudent.

74(7.6) + 81(0) = 74(0) + 81(v₂)

562.4 = 81v₂

v₂ = 562.4/81

v₂ = 6.94 m/s

Thus, the final velocity of the other student after the elastic collision with Logan is 6.94 m/s.

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Answer:

I think it's Experimental

Explanation:

it has atoms on it.

Answer:

D

Explanation:

It is a physical model.

Answer:

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

Answer:

you get a light white

Explanation:

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

Light travels in straight lines

Light is a form of energy.

Light travels in waves.

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:

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]

(a) The final velocity if the trucks lock together after the collision is 7.66 m/s.

(b) The decrease in the kinetic energy after the collision is 11,165.1 J.

The final velocity of the two truck system after the collision is determined by applying the principle of conservation of linear momentum as shown below;

m₁u₁ + m₂u₂ = v(m₁ + m₂)

4285(9.35) + 5495(6.35) = v(4285 + 5495)

74,958 = 9,780v

v = 74,958/9780

v = 7.66 m/s

K.E = ¹/₂mv²

K.Ei = ¹/₂(4285)(9.35)² + ¹/₂(5495)(6.35)²

K.Ei = 298,088.78 J

K.Ef = ¹/₂(m₁ + m₂)v²

K.Ef = ¹/₂(4285  + 5495)(7.66)²

K.Ef = 286,923.68 J

ΔK.E = K.Ef - K.Ei

ΔK.E = 286,923.68 J - 298,088.78 J

ΔK.E = - 11,165.1 J

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The right answer is Frequency. Option A

Frequency is defined as the number of wave oscillations per unit of time and is measured in hertz. Frequency is directly proportional to pitch. Distance from the rest position to maximum shaft deflection. Frequency The number of waves he passes through a particular point per second. Measures the time it takes for a wave cycle to complete.

Maximum displacement or distance traveled by a point on the vibrating body or shaft, measured from the equilibrium position. This corresponds to half the length of the vibration path. The frequencies are opposite. The number of wave cycles to complete per second. Both amplitude and wavelength are measures of distance. Amplitude measures the height of the wave crest from the centerline. Wavelength measures the horizontal distance between cycles.

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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.

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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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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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:

400N

Explanation:

Newton's second law of motion

F = ma

20 x 20 = F

F = 400

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

The absence of external force in the outer space, allows the piece of rock to continue moving at the same velocity for thousands of years.

The outer space is almost an absolute vacuum, because it's nearly empty. There is no matter such as air in the outer space that will provide an external force needed to change the velocity of the piece of rock.

From Newton's first law of motion, an object in a state of rest or uniform motion in a straight line, will continue in that state unless it is acted upon by an external force.

Thus, the absence of external force in the outer space, allows the piece of rock to continue moving at the same velocity for thousands of years.

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Answer:

inertia

Explanation:

Answer:

the current of 12 ohm is 2A