Which statement best explains the difference between light waves traveling through a vacuum and light waves traveling through a medium?

Answer:

oh I'm so sorry I can't answer your question it has been a long time since I learned that. so I totally forgot how to do this. sorry!

Answer:

a lens is scattering light

Explanation:

Diagram B shows a plano concave lens. Plano-Concave lenses bend parallel input rays to diverge from one another on the output side of the lens and hence have a negative focal length.

In the given figure, a Plano concave lens is shown. It scatters light. The image is formed in front of lens. The formed image is virtual.

Hence, the correct option is (c) "a lens is scattering light".

Answer:

Natural selection is a mechanism, or cause, of evolution.

Explanation:

Adaptations are physical or behavioral traits that make an organism better suited to its environment. Heritable variation comes from random mutations.

Answer:

a = 5 m / s²   and    x = 562.5 m

Explanation:

Let's apply the kinematics relations

          v = v₀ + at

          v² = v₀² + 2a x

In this case, as the car stops, its final speed is zero (v = 0) and the acceleration must be opposite to the speed, that is, negative

           0 = v₀ - a t

           a = v₀ / t

let's calculate

           a = 75/15

           a = 5 m / s²

let's look for the distance

           0 = v₀² - 2a x

           x = v₀² / 2a

let's calculate

           x = [tex]\frac{75^2}{2 \ 5 }[/tex]

           x = 562.5 m

Answer:

Explanation:

Pooh Shiesty, that's my dawg

But Pooh, you know I'm really shiesty

You told all them O.T. ni  ggas that you really slide

Tell the truth about your gang, they really dyin'

I got my own fire, don't need security in the club

All that woofin' on the net , I thought you was a thug

They ain't got nowhere to go, I sh0t up everywhere they was

Yeah, you know who took that - from you

Come get it back in blood

Come get it back in blood

Answer:

24 Coulumbs

Explanation:

Given data

time= 1 minute= 6 seconds

P=2 W

R= 12 ohm

We know that

P= I^2R

P/R= I^2

2/12= I^2

I^2= 0.166

I= √0.166

I= 0.4 amps

We know also that

Q= It

substitute

Q= 0.4*60

Q= 24 Columbs

Hence the charge is 24 Coulumbs

Answer:

30C

Explanation:

its basically how the other guy did it but he worked it out with 2W instead of 3W so he got it wrong so its 30C and not 24C

Answer: -3cm

Explanation:

Answer:

-3

Explanation:

edg

Answer:

A plane's engines are designed to move it forward at high speed. That makes air flow rapidly over the wings, which throw the air down toward the ground, generating an upward force called lift that overcomes the plane's weight and holds it in the sky. The wings force the air downward and that pushes the plane upward.

Explanation:

planes stay in air because of 2 reasons :

Plane's wings are designed to push the air downwards and letting the plane to lift off and stay in air..

Answer:

See explanation

Explanation:

Given that;

q1 and q2 are the magnitudes of the two charges while r1 is the distance between the charges.

F1 =kq1q2/r1^2

Then,

F2 = kq1q2/(2r1)^2

F2 = kq1q2/4r1^2

So,

F2 = 1/4 F1

The force between the charges changes by a factor of 1/4.

Answer: Any sound cannot be heard through a glass bell jar because a vacuum is created in the jar and sound cannot travel without a medium like gases, solids or liquids

Answer:

the glass hids it and the vibration of the phone is the way you hear it

Answer:

strengthens ur muscles

Answer:

There are a many ways to produce electricity. Electrons can flow between certain different materials providing a current, as in a common battery. While reliable and portable, chemical batteries run down quickly. To provide the large amounts of steady power demanded by modern societies, large power plants have been built. Most power plants make electricity with a machine called a generator.

A 1925 Turbine Rotor

A 1925 turbine rotor for a Westinghouse generator, Image #21.035, Science Service Historical Image Collection, National Museum of American History

Generators have two important parts: the rotor (which rotates) and the stator (which remains stationary). Generators use the principle of electro-magnetic induction, which exploits the relation between magnetism and electricity. In large AC generators, an outer shell with powerful magnets rotates around a stationary "armature" which is wound with heavy wire. As they move, the magnets induce an electric current in the wire.

It is important to recognize that electricity is not mined or harvested, it must be manufactured. And since it's not easily stored in quantity, it must be manufactured at time of demand. Electricity is a form of energy, but not an energy source. Different generating plants harness different energy sources to make electric power. The two most common types are "Thermal Plants" and "Kinetic Plants".

Answer:

drag weight lift thrust

Answer:

The answer you have selected is correct.

Explanation:

Increase radius, force of gravity decreases

Answer:

The deceleration is -7.85x10³ rad/s².

Explanation:

The angular speed (ω) is related to frequency (f) as follows:

[tex] \omega = 2\pi f [/tex]

When the frequency is 30 Hz the angular speed is:

[tex] \omega_{i} = 2\pi f = 2\pi*30 Hz = 188.5 rad/s [/tex]

Now, when the frequency is 20 Hz the angular speed is:

[tex] \omega_{f} = 2\pi*20 Hz = 125.7 rad/s [/tex]

Finally, the angular acceleration (α) can be found using the following equation:

[tex] \omega_{f}^{2} = \omega_{i}^{2} + 2\theta \alpha [/tex]

Where:

θ: is the angular displacement = 72°

[tex] \alpha = \frac{\omega_{f}^{2} - \omega_{i}^{2}}{2\theta} [/tex]

[tex] \alpha = \frac{(125.7 rad/s)^{2} - (188.5 rad/s)^{2}}{2*72*\frac{2\pi rad}{360}} = -7.85 \cdot 10^{3} rad/s^{2} [/tex]        

Therefore, the deceleration is -7.85x10³ rad/s².

I hope it helps you!                  

Answer:

A mirror is scattering light.

Quantity is most closely related to the speed of gas particles is the temperature of the gas.

Specifically, the speed of the molecules in a gas is dependent on its temperature (the higher the temperature the faster the gas molecules move). Another way to think of it is that the temperature of a gas is a measure of the average kinetic energy of that gas.

"Temperature is the measure of hotness or coldness expressed in terms of any of several scales, including Fahrenheit and Celsius. Temperature indicates the direction in which heat energy will spontaneously flow—i.e., from a hotter body (one at a higher temperature) to a colder body (one at a lower temperature)."

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Answer:thx

Explanation:

Answer:

it is A

Explanation:

i had the question

100W translates to 100 watts consumed in 1 hour. Assuming the printer consumes electrical energy at a steady rate, then: 100 ÷ 60 = 1.6667 watts per minute. 1.6667 ÷ 2 = 0.8333 watts consumed in 30 seconds.

A printer has power of 100 W, and it takes time of 30 seconds to print out the document, then the power consumed in 30 seconds will be 0.8333 W.

The quantity of energy moved or changed per unit of time is termed as power in physics. The watt, or one joule per second, is the unit of power in the International System of Units. Power is also referred to as activity in historical texts. A scalar quantity is power.

Power is connected to other factors; for instance, the power required to move a land vehicle is equivalent to the sum of the vehicle's velocity, traction force on its wheels, and aerodynamic drag.

Assuming the printer consumes electrical energy at a steady rate, then:

100 ÷ 60 = 1.6667 watts per minute.

Now, calculate the power consumed in 30 seconds,

1.6667 ÷ 2 = 0.8333 watts.

Therefore, the power consumed in 30 seconds will be 0.8333 watts.

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Answer:

a = 3 m/s^2

Explanation:

Vi = 10 m/s

Vf = 40 m/s

t = 10 s

Plug those values into the following equation:

Vf = Vi + at

40 = 10 + 10a

---> a = 3 m/s^2

The car is traveling with an initial velocity of 10 m/s, a final velocity of 40 m/s in the time period of 10 seconds, then the acceleration of the car is 3 m/s².

Acceleration describes a change in an object's velocity. By accelerating, decelerating, or changing direction of motion, an object's velocity may change.

An apple falling to the ground, the moon orbiting the earth, and a car stopping at a set of traffic lights are a few examples of acceleration. With the aid of these illustrations, we may better see that acceleration occurs whenever a moving object modifies its direction, speed, or both.

The given values according to the question are,

Initial velocity, u = 10 m/s

Final velocity, v = 40 m/s and,

Time, t = 10 seconds.

Use the equation of motion to find the acceleration,

v = u + at

40 = 10 + (a)10

a = 30/10

a = 3 m/s².

Hence, the acceleration of the car is 3 m/s².

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Answer:

Explanation:

The particles in solids are very close together. They are tightly packed, giving solids high densities.

The particles in gases are very far apart, so gases have a very low density.

Answer:

22.5/s is the frequency of the wave

Given:

We know,

→ [tex]Frequency (f) = \frac{C}{\lambda}[/tex]

By substituting the values,

                         [tex]= \frac{450}{20}[/tex]

                         [tex]= 22.5 \ Hz[/tex]

Thus the approach above is right.

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Answer:Its a Soild

Explanation:

Answer:

Explanation:

Remark

This is a conservation problem.

The momentum before impact = momentum after impact

momentum before

m = 0.04 kg

v = 300 m/s

momentum after

m = 0.5 kg + 0.04kg    That's the mass of the block and bullet

v = ?

Solution

0.04 * 300 = 0.54 * x

12 kg m/s   = 0.54 kg * x

12 / 0.54 = x

x = 22.22 m/s

Answer:

La distancia entre los dos cuerpos es aproximadamente 1.269 milímetros.

Explanation:

Asumamos que ambos cuerpos son partículas, la fuerza de atracción ([tex]F[/tex]), en newtons, entre ambos cuerpos se define mediante la Ley de Newton de la Gravitación Universal, cuya ecuación es:

[tex]F = G \cdot \frac{m_{1}\cdot m_{2}}{r^{2}}[/tex] (1)

Donde:

[tex]G[/tex] - Constante de la gravitación universal, en metros cúbicos por kilogramo-segundo cuadrado.

[tex]m_{1}, m_{2}[/tex] - Masas de los cuerpos, en kilogramos.

[tex]r[/tex] - Distancia entre los cuerpos, en metros.

Si sabemos que [tex]G = 6.674\times 10^{-11}\,\frac{m^{3}}{kg\cdot s^{2}}[/tex], [tex]m_{1} = 0.48\,kg[/tex], [tex]m_{2} = 0.196\,kg[/tex] y [tex]F = 3.9\times 10^{-6}\,N[/tex], entonces la distancia entre los dos cuerpos es:

[tex]r = \sqrt{\frac{G\cdot m_{1}\cdot m_{2}}{F} }[/tex]

[tex]r \approx 1.269\times 10^{-3}\,m[/tex]

Es decir, la distancia entre los dos cuerpos es aproximadamente 1.269 milímetros.

Answer: D

Explanation: I have my answers VS. Go0gle answers (go0gle answers are pics)

(A) Both have the same day length. Well, Venus doesn't havve the same amount of days. (I already know off the top of my head, but I still searched it up)

(B) Both rotate in the same direction. In school (before Virus) they would always show diagrams of the planets on the projector and Venus doesn't rotate

(C) Both have ample water. No. Venus doesn't have much water >_>

(D) Both have a solid inner core and a liquid outer core. Yesh. In my lessons (before), Venus has a solid inner core and liquid outer core.

Answer:

(F = ma ) Newton's second law states that force is proportional to what is required for an object of constant mass to change its velocity. This is equal to that object's mass multiplied by its acceleration.