Covalent compounds......

I think it's the yellow one

Answer:

Destructive interference

Answer:

Is equal to the sum of the number of protons and neutrons in the nucleus.

Explanation:

Answer:

Work is defined as force thru a distance:   W = F * S

Power is defined as Work per unit time  P = W / t

So we an write:  P = F * S / t  = 2000 N * 50 m / 5 s = 20,000 N-m/s

Since a Joule/sec is equivalent to a Watt

The power required is 20,000 Watts or 20  Kw

Also, you can convert to Hp since 1 Hp = 746 Watts

Answer: (A) Ingrid is incorrect. The clay appears red because it reflects red wavelengths.

Explanation:

Edge 2021

Ingrid is correct. The clay appears red because it reflects red wavelengths.

Hence option A is correct.

Wave is is a disturbance in a medium that carries energy as well as momentum . wave is characterized by amplitude, wavelength and phase. Amplitude is the greatest distance that the particles are vibrating. especially a sound or radio wave, moves up and down. Amplitude is a measure of loudness of a sound wave. More amplitude means more loud is the sound wave.

Wavelength is the distance between two points on the wave which are in same phase. Phase is the position of a wave at a point at time t on a waveform.

There are two types of the wave longitudinal wave and transverse wave.

Longitudinal wave : in which, vibration of the medium (particle) is parallel to propagation of the wave. Sound wave is a longitudinal wave. Transverse wave : in which, vibration of the medium (particle) is perpendicular to propagation of the wave. Light wave is a Transverse wave.

Ingrid says that a red ball of clay appears red because the clay reflects red wavelengths. this statement is true.

Hence option A is correct.

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Answerbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb:

Explanation:

b

Answer:

Quantization is the process of replacing analog samples with approximate values taken from a finite set of allowed values.

Explanation:

Answer:

Where is the question?

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Answer:

La masa del objeto es 270.027 kilogramos.

Explanation:

Asumamos que el cuerpo decelera a tasa constante, entonces podemos calcularlo por medio de la siguiente ecuación cinemática:

[tex]a = \frac{v-v_{o}}{t}[/tex] (1)

Donde:

[tex]v_{o}[/tex] - Velocidad inicial, en metros por segundo.

[tex]v[/tex] - Velocidad final, en metros por segundo.

[tex]t[/tex] - Tiempo, en segundos.

[tex]a[/tex] - Deceleración, en metros per segundo al cuadrado.

Si sabemos que [tex]v_{o} = 33.889\,\frac{m}{s}[/tex], [tex]v = 13.889\,\frac{m}{s}[/tex] y [tex]t = 4.5\,s[/tex], entonces la deceleración experimentada por el cuerpo es:

[tex]a = \frac{v-v_{o}}{t}[/tex]

[tex]a = -4.444\,\frac{m}{s^{2}}[/tex]

Por las Leyes de Newton, tenemos que la masa del cuerpo se calcula a partir de la siguiente expresión:

[tex]m = \frac{F}{a}[/tex] (2)

Donde:

[tex]m[/tex] - Masa, en kilogramos.

[tex]F[/tex] - Fuerza de frenado, en newtons.

Si sabemos que [tex]F = -1200\,N[/tex] y [tex]a = -4.444\,\frac{m}{s^{2}}[/tex], entonces la masa del cuerpo es:

[tex]m = \frac{F}{a}[/tex]

[tex]m = 270.027\,kg[/tex]

La masa del objeto es 270.027 kilogramos.

Answer:

E = 10078.32 J

Explanation:

Given that,

The weight of a window cleaner, F = 839.86 N

The window cleaner is cleaning windows on the 4th floor of a building at a height of 12 m.

We need to find the potential energy of the window cleaner. We know that the potential energy of an object is given by :

E = mgh

Put values,

E = 839.86 × 12

E = 10078.32  J

So, the window cleaner will have 10078.32  J of potential energy.

Answer:

B. Electrical energy transforms into mechanical energy.

Explanation:

In the case when the wire loop transforms between the two permanent magnets in a generator so here the electrical energy turns to mechanical energy as there is a working principle behind the generator that the electrical energy would turns into mechanical energy

Therefore as per the given scenario, the option b is correct

And, the rest of the options are wrong

Answer:

It is D

Explanation: Use of these terms stretches back to World War I. One American field order from September 1918 noted, “The First Army will attack at H-Hour on D-Day with the object of forcing the evacuation of the St. Mihiel salient.” Other nations had their own shorthand. In World War I, the French used the code date “le Jour J,” while the British called their operation start days “Z-Day” and “Zero Hour.”

Hope this helps

You and your younger sister (who weighs half as much you do) are at a skating rink. You and your sister's both move backward but your sister accelerates at a greater rate.

The time rate of change of velocity with time.

As both are holding each other, they will be pushed backwards because the skating they wear makes them to move backwards. The equal and opposite force is applied on each other.

The force F =mass x acceleration.

The lesser mass greater will be the acceleration. Your sister with half weight of yours will accelerate more.

Thus, you and your sister's both move backward but your sister accelerates at a greater rate.

Learn more about acceleration.

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Answer: The sun's rays strike Earth's surface most directly at the equator. This focuses the rays on a small area. Because the rays hit more directly, the area is heated more.

The light is most intense where it strikes Earth's surface most directly at the equator

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Answer:

1. troposphere

2. troposphere (still)

3. The most abundant gas in the atmosphere is nitrogen, with oxygen second. Argon, an inert gas, is the third most abundant gas in the atmosphere.

4.The stratosphere is where you'll find the very important ozone layer. The ozone layer helps protect us from ultraviolet radiation (UV) from the sun. In fact, the ozone layer absorbs most of the UV radiation the sun sends to us. Life as we know it wouldn't be possible without this layer of protection.

5. It contains the ozone, which protects Earth from the sun's radiation. Why aren't there many meteors in the troposphere? They burn up before they reach the troposphere.

Explanation:

1.The troposphere is the atmospheric layer closest to the planet and contains the largest percentage (around 80%) of the mass of the total atmosphere. Temperature and water vapor content in the troposphere decrease rapidly with altitude.

2.The layer closest to Earth's surface is the troposphere, reaching from about seven and 15 kilometers (five to 10 miles) from the surface. The troposphere is thickest at the equator, and much thinner at the North and South Poles.

3. Explained in the answer.

4. Explained in the answer.

5. Explained in the answer.

Explanation:

this is almost similar to how a syringe works. when the pump is drown out, air in the barrel expands and pressure is reduced to below atmospheric pressure. the air from outside the pump is at high pressure so it flows past the leather washer into the barrel. at some point, the higher pressure in the tyre closes for valve.

when the pump handle is pushed in the air is forced into the tyre though the tyre valve which now opens

Answer:

a lot of force is the answer

Explanation:

happy Ramadan kid

Answer:

Sun, fireflies, glow worms ,Stars ,a lighter torch ,a kerosene Oil Lamp, burning candle, vapor light, a bulb

Answer:

Sun

Flame in an oil lamp

tube light

bulb

fireflies

lighted candle

LEDs

laser

jellyfish

Fire

Explanation:

luminous objects are objects that produce light and are responsible for vision.

Answer:

i think it would be either b or c because....

Explanation:

"The desert biome is best adapted for aloe because aloe plant usuallly grows in open area under sunlight exposure where the intensity of sunlight is very high. Its grows in very rocky, dry and open areas."

Answer:

Explanation:

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Answer: How much gravitational potential energy does the ball have at this point? At h = 20.4 m the gravitational potential energy of the ball reaches maximum.  

How much work did I do lifting up the ball?  As you are lifting the object you are doing work on the object. The work W done on an object by a constant force is defined as W = F·d. It is equal to the magnitude of the force, multiplied by the distance the object moves in the direction of the force.

Answer:

127

Explanation:

f(n)=mg

(13)*(9.81)

127.4N

Answer: 8.6m/s

Explanation:From KE=1/2mv^2

In order to make v the subject of the formula we divide both sides by 1/2m. Thus V^2 will be left alone on the RHS. But we are looking for v and not v^2. Thus we find the square root of KE1/2m

Meaning V= sqrt[3000÷1/2 of 80]

=sqrt[3000÷40]

=sqrt(75)

=8.6m/s

Answer:

If the passengers were not wearing their seat belts:, then the passengers in motion would continue in motion. Assuming a negligible amount of friction between the passengers and the seats, the passengers would likely be propelled from the car and be hurled into the air. Once they leave the car, the passengers becomes projectiles and continue in projectile-like motion.

If they were: Any passengers in the car will also be decelerated to rest if they are strapped to the car by seat belts. Being strapped tightly to the car, the passengers share the same state of motion as the car. As the car accelerates, the passengers accelerate with it; as the car decelerates, the passengers decelerate with it; and as the car maintains a constant speed, the passengers maintain a constant speed as well.

I got this from https://www.physicsclassroom.com