Question 20 Essay Worth 5 points)
What is the power rating of an LED light bulb if 0.50 A flow through it when connected to an 18 V battery?
Remember to identify all data (givens and unknowns), list equations used, show all your work, and include units and the proper number of
significant digits to receive full credit

Explanation:

9.3x105

Simplifies to:

9.3x100000

=9.3x100000  

Hope that helps

Black is not a color, but rather a shade. In color theory, a shade is a pure color mixed with black. It decreases its lightness while nearly conserving its chromaticity. Strictly speaking, a "shade of black" is always a pure black itself and a "tint of black" would be a neutral gray. Unlike these, many off-black colors possess a hue and a colorfulness (also called saturation).

Attached is an image showing a few of the different shades of black.

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The answer is "no" because black is not made of all colors, in fact black is not a color, but black is the absence of light.

Light is an electromagnetic radiation which can be recognized by the human eye. Electromagnetic radiation occurs at a wide variety of wavelengths, from cosmic rays with wavelengths smaller than around 1 1011 meters to radio waves estimated in meters.

Within that large spectrum, the colors visible to humans comprise a relatively small band, ranging from around 700 nanometers for red light to roughly 400 nm for violet light. The spectral areas close to the visible band are also referred to as light, with infrared at one side and ultraviolet the other.

The absence or full assimilation of visible light produces the color black. It is an anamorphic lens color with no tint, similar to white and gray. It is frequently used symbolically or colloquially to denote darkness.

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Answer: Economic growth is the main channel. Globalization can affect poverty. when countries open up to trade, they tend to grow faster and living standards do tend to increase.

Explanation: I hope this helps :)

Answer:

because non renewables resources are ending day by day ,

alternative energy resources are renewables so it can reduce the load of using non renewables,etc

Explanation:

hope this will help you!

This question involves the concepts of the equations of motion, kinetic energy, and potential energy.

a. The kinetic energy of the rocket at launch is "3.6 J".

b. maximum gravitational potential energy of the rocket is "3.6 J".

The kinetic energy of the rocket at launch is given by the following formula:

[tex]K.E=\frac{1}{2} m v_i^2[/tex]

where,

Therefore,

[tex]K.E=\frac{1}{2}(0.05\ kg)(12\ m/s)^2[/tex]

K.E = 3.6 J

First, we will use the third equation of motion to find the maximum height reached by rocket:

[tex]2gh=v_f^2-v_i^2[/tex]

where,

Therefore,

2(-9.81 m/s²)h = (0 m/s)² - (12 m/s)²

h = 7.34 m

Hence, the maximum gravitational potential energy will be:

P.E = mgh

P.E = (0.05 kg)(9.81 m/s²)(7.34 m)

P.E = 3.6 J

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Hi there!

We can begin by doing a summation of forces for each block.

Block A:

This block has the force of tension (in direction of acceleration +) and static friction (opposite direction -) acting on it. Thus:

[tex]\Sigma F_A = T - F_s\\\\m_Aa = T - \mu m_Ag[/tex]

Block B:

This block has the force of tension (opposite of acc. -) and gravity (in direction of acc +), working on it.

[tex]\Sigma F_B = m_Bg - T\\\\ m_Ba = m_Bg - T[/tex]

Add both of the expressions and solve for the maximum mass of Block B.

[tex]\Sigma F = m_Bg - T + T - \mu m_Ag\\\\a(m_A + m_B) = m_Bg - \mu m_Ag[/tex]

To find the minimum value, we can set a = 0, so:

[tex]0 = m_Bg - \mu m_Ag\\\\\mu m_Ag = m_B g\\\\0.8(20)(9.8) = m_B (9.8)\\\\m_B = \frac{0.8(20)(9.8)}{9.8)} = \boxed{16 kg}[/tex]

The block must weigh > 16 kg for block A to move.

Answer:

a

Explanation:

The height of the bullet when the velocity is zero is 256 ft.

The height of the bullet when the velocity is zero is determined by taking derivative of the function as shown below;

[tex]v = \frac{dy}{dt} = 128 -32t \\\\when \ v \ is \ zero\\\\v = 0\\\\128 - 32t = 0\\\\32t = 128\\\\t = \frac{128}{32} \\\\t = 4 \ s[/tex]

The height of the bullet at this time is calculated as follows;

[tex]y(4) = 128(4) - 16(4)^2\\\\y(4) = 256 \ ft[/tex]

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Answer:

work

Explanation:

Answer:

kmvmm x=0

               l

              V  

                  V

                      0 = kmvm = x=0

Explanation:

It is dependent on the sensitivity of the eye to the entire spectrum of visible wavelengths emitted by the source, and the radiant flux (or radiant power) produced at each wavelength. We weight the radiant flux at each wavelength using the luminosity function V-lambda.

Answer:

when the moon moves in front of the Sun as seen from a location on Earth.

Explanation:

A solar eclipse happens when the moon moves in front of the Sun as seen from a location on Earth. During a solar eclipse, it gets dimer and dimmer outside as more and more of the Sun is covered by the Moon. During a total eclipse, the entire Sun is covered for a few minutes and it becomes very dark outside.

[tex]false[/tex]

Hope it helps you

Answer:

▪list some of the electronic system?

➢ An audio system, TV, or any Mp3 player is the example of an electronic system. The sound waves are converted to electrical signals and they are amplified to process the output of high strengthened audio signals, through speakers.

[tex]TextFromYourMrEx...[/tex]

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Answer:

497 m/s

Explanation:

(8.864 x 10^3 m)/(0.297 * 60 sec) = 497 m/s

The  velocity (in metres per second) of a Canadian Forces CF-18 fighter jet would be 497.41 meters/second.

The total distance covered by any object per unit of time is known as speed.

As given in the problem we have to find out the  velocity (in meters per second) of a Canadian Forces CF-18 fighter jet that travels 8.864 kilometers [S] in 0.297 minutes,

The distance traveled by the  CF-18 fighter jet =  8.864 kilometers

1 kilometer = 1000 meters

8.864 kilometers = 8.864× 1000 meters

                             =8864 meters

The time taken by  CF-18 fighter jet = 0.297 minutes

1 minute = 60 seconds

0.297 minutes = 0.297 ×60 seconds

                        =17.82 seconds

The velocity of the CF-18 fighter jet =8864 meters/17.82 seconds

                                                         = 497.41 meters/second

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Answer:

the ball is in the air for 10 seconds

Explanation:

let gravity = 10m/s/s

height = 1/2 acceleration • time^2

125 m = 1/2 •  10 m/s/s • time ^2

125m = 5 m/s/s • time^2

25s = time^2

5 s = time

5 seconds is the time required for half of the flight

time total = 2 • time

time total = 2 • 5s

time total = 10 s

Answer:

yes !

Explanation:

a mirror transforms and flips , but nonetheless produces a real image.

Answer:

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

Explanation:

[tex]v = u + at[/tex]

[tex]v - u = at[/tex]

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

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

Answer:

0.816 kg

Explanation:

[tex]E_k=\frac{1}{2}mv^{2}\\[/tex]

so [tex]m=\frac{2E_k}{v^2}=\frac{2\times500}{35^2}=0.816 kg[/tex]

The position vector of the object after 1 second is (11,000 m, 10,000 m).

The angular speed of the object is calculated as follows;

[tex]\omega = \frac{1 \ }{0.1 \ s} = 10 \ rad/s[/tex]

v = ωr

v = 10 x 1 km

v = 10 x 1000 m

v = 10,000 m/s

[tex]v_x = 1000\ m \ + \ 10,000\ m/s \times 1\ s = 11,000 \ m\\\\v_y = 0 m \ + \ 10,000 \ m/s \times 1 \ s = 10,000 \ m[/tex]

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Answer:

1.25 sec, 2 m/s

Explanation:

Period = 2 * 0.625 sec = 1.25 sec

speed = 2.5/1.25 = 2 m/s

Answer:

Isaac Newton is considered one of the most important scientists in history. ... During his lifetime Newton developed the theory of gravity, the laws of motion (which became the basis for physics), a new type of mathematics called calculus. The legend is that Newton discovered Gravity when he saw a falling apple while thinking about the forces of nature. Whatever really happened, Newton realized that some force must be acting on falling objects like apples because otherwise they would not start moving from rest.

This is because Gravity exists everywhere in the universe.

This is the force of attraction which acts on all matters in the universe. Astronauts appear weightless while in orbiting the Earth because the space shuttle and the astronauts are in free fall around it.

They fall at the same rate as the space shuttle which is why the astronauts appear weightless.

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Astronauts and their spaceship are affected by Earth's gravity in space. Even though Earth's gravitational influence is weaker in orbit than on Earth's surface, they have weight. They don't feel their weight since nothing's pushing back.

Weightlessness means no weight. It's also called zero-G. Weight is the force on a stationary object in a strong gravitational field.

The sensation of weightlessness that astronauts on board the International Space Station enjoy is due to the fact that they are free falling toward the planet Earth. Because the space station and the astronauts are moving at the same rate, there is no external normal force acting upon the body in free fall to balance out the effects of the body's own weight (equal to g).

Therefore, the astronauts and their spaceship continue to have mass and are still affected by the gravitational pull of the Earth.

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Answer:

F= 1.67 x [tex]10^{-13}[/tex]N

Explanation:

I used this equation:

F = GMm/R²

Where M is mass 1

where m is mass 2

where R is distance

where F is gravitational force

Answer:

A and B

Explanation:

Kinetic energy is when an object is in motion, and potential energy is kind of when an object stops being in motion, or there is a pause in motion for an extent of time.

When you are holding the book before dropping it, that book is at potential energy. When you drop the book, the book gains kinetic energy as it falls from your hands and hits the floor. Once it hits the floor and rests, it regains potential energy.

I hope that this helps.

Answer:

1.Light is a transverse, electromagnetic wave that can be seen by the typical human.

2.The Sun is the major source of light for the earth.

3.An inclusive list of the basic categories of behavior for light would most likely include transmission, absorption, reflection, refraction, diffraction, scattering, polarization and interference.

4.Spherical mirrors contain curved surfaces which are painted on either one of the sides. When an inward surface of a spherical mirror is painted, then this type of mirror is considered a convex mirror. In the meantime, when the outward surface of the spherical mirror is painted, this mirror is called a concave mirror.

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Answer:

3600 N

Explanation:

F=ma

1200*3 = 3600

The charge on the capacitor 2 (C₂) is 48μF.

In the circuit diagram, C₁ and C₂ are in series connection, while C₃ is parallel to C₁ and C₂.

[tex]Q_1 = Q_2 = Q\\\\V = \frac{Q}{C_1} + \frac{Q}{C_2} \\\\V = Q(\frac{1}{C_1}+ \frac{1}{C_2} )\\\\V = Q(\frac{C_2 + C_1}{C_1 C_2} )\\\\Q = V(\frac{C_1 C_2}{C_2+ C_1} )\\\\Q = 24 \times (\frac{6\times 10^{-6} \times 3 \times 10^{-6}}{6\times 10^{-6} \ + \ 3\times 10^{-6}} )\\\\Q = \frac{4.32 \times 10^{-10}}{9\times 10^{-6}} \\\\Q = 4.8\times 10^{-5} \ C\\\\Q = 48 \ \mu C[/tex]

Thus, the charge on the capacitor 2 (C₂) is 48μF.

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Answer:

Egg, Embryo, infant, adolescent and adult

Answer:

egg,embryo,infant,adolesent,adlt /B

Explanation: