In astronomy, distances are often expressed in lightyears. One lightyear is the distance that light travels in one Earth year. The distance to Alpha Centauri, the next closest star, is 4.3 lightyears away. How far is this in meters?

Answer:

900 Revolution/Minute (rev/min)

=

94.24778 Radian/Second (rad/s)

Explanation:

The theoretical electricity consumption is 268.179 kilowatt-hours per metric tonne.

The theoretical minimum of electricity consumption is 60.340 % of the practical minimum of electricity consumption.

The theoretical electricity consumption is equal to the sum of sensible heat ([tex]q_{s}[/tex]) and latent heat ([tex]q_{l}[/tex]) needed to melt a metric ton of steel, in kilowatt-hours per metric tonne:

[tex]q = q_{s}+q_{l}[/tex]   (1)

By definitions of sensible and latent heat, we have the following formulas:

[tex]q = c\cdot (T_{f}-T_{o}) + L_{f}[/tex]   (1)

Where:

If we know that [tex]c = 1.294\times 10^{-1}\,\frac{kWh}{ton\cdot ^{\circ}C}[/tex], [tex]T_{o} = 20\,^{\circ}C[/tex], [tex]T_{f} = 1500\,^{\circ}C[/tex] and [tex]L_{f} = 76.667\,\frac{kWh}{ton}[/tex], then the theoretical electricity consumption is:

[tex]q = \left(1.294\times 10^{-1}\,\frac{kWh}{ton\cdot ^{\circ}C} \right)\cdot (1500\,^{\circ}C-20\,^{\circ}C)+76.667\,\frac{kWh}{ton}[/tex]

[tex]q = 268.179\,\frac{kWh}{ton}[/tex]

The theoretical electricity consumption is 268.179 kilowatt-hours per metric tonne. [tex]\blacksquare[/tex]

According to the document "Theoretical Minimum Energies to Produce Steel for Selected Conditions" done by R.J. Fruehan et al. in March 2000. The practical minimum of electricity consumption for a electric arc furnace (EAF) is:

[tex]q_{real, min} = 444.444\,\frac{kWh}{ton}[/tex]

This indicator consider common energy losses throughout steel production.

The theoretical minimum of electricity consumption is 60.340 % of the practical minimum of electricity consumption. [tex]\blacksquare[/tex]

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The ratio m/q for this particle is mathematically given as

m/q=2.39*10^{-6}

Question Parameters:

After being accelerated to a speed of 1.17×105 m/s

the uniform magnetic field of strength 0.800 T and travels in a circle of radius 35.0 cm

Generally, the equation for the Centrifugal force  is mathematically given as

[tex]qvB=\frac{mv^2}{r}[/tex]

Therefore

m/q=(0.8*0.35)/(1.17*10^{5})

m/q=2.39*10^{-6}

In conclusion, the ratio m/q for this particle

m/q=2.39*10^{-6}

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[tex]\large{\underline{\underline{\pmb{\frak {\color {red}{Question:}}}}}}[/tex]

[tex] \sf \red{what \: is \: propagation}[/tex]

[tex]\large{\underline{\underline{\pmb{\frak {\color {blue}{Answer:}}}}}}[/tex]

Propagation is an asèxual method of reproduction. In propagation, the DNA from the parents is taken to form another organism.

[tex]\green\star[/tex]There are two types of propagation:

1. Vegetative propagation: In vegetative propagation, new plants are obtained from the parts of old plants (like stem, roots and leaves), without the help of any reproductive organs.

2. Artificial propagation: Human grow by some man made methods are called artificial propagation.

[tex] \boxed{ \frak \red{brainlysamurai}}[/tex]

Answer:

a closed polygon whose sides taken in order represent in magnitude and direction a system of forces in equilibrium.

Explanation:

Answer: a closed polygon whose sides taken in order represent in magnitude and direction a system of forces in equilibrium.

Explanation: Hope that helps.

Question :-

Answer :-

[tex] \rule {180pt} {2pt} [/tex]

Given :-

To Find :-

Solution :-

As per the provided information in the given question, we have been given that the Radius of the Watch is 5 meter , Time is given 2 seconds . And, we have been asked to calculate the Velocity of the Watch .

For calculating the Velocity , we will use Formula :-

Therefore , by Substituting the given values in the above Formula :-

⇒ Velocity = Displacement / Time

⇒ Velocity = 5 / 2

⇒ Velocity = 2.5

Hence :-

[tex] \underline {\rule {180pt} {4pt}} [/tex]

⇒ Velocity = Displacement / Time

⇒ Velocity = 5 / 2

⇒ Velocity = 2.5

V= IR

160 = I × 2

80 A = I = current

Answer:

80 A

Explanation:

by ohm's law, resistance is equal to the change in voltage over the current so if we plug and solve for current we get I = (160V)/(2V/A)= 80 A

The question about colours that could be answered through scientific investigation is 'Which color bends the most to make a rainbow?'. That is option A.

A beam of white light is made up of several colours which bends or refracts away as it strikes another medium or glass.

This bending of these colours can be visualised using prism experiments.

When this experiment is carried out, it would be observed that each color has a different wavelength, and it bends differently from all other colors.

Therefore, The question about colours that could be answered through scientific investigation is 'Which color bends the most to make a rainbow?'.

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Using first equation of kinematics

[tex]\\ \rm{:}\dashrightarrow v=u+at[/tex]

[tex]\\ \rm{:}\dashrightarrow v-u=at[/tex]

[tex]\\ \rm{:}\dashrightarrow 6.1-10.2=-1.77t[/tex]

[tex]\\ \rm{:}\dashrightarrow -4.1=-1.77t[/tex]

[tex]\\ \rm{:}\dashrightarrow t=2.32s[/tex]

Answer:

Internal energy is all the energy contained in an object, including both kinetic energy and potential energy

Answer:

the quantity of rotation of a body, which is the product of its moment of inertia and its angular velocity.

angular momentum : The property of rotating object given by radius times linear momentum.

L = r x p

p = linear momentum

or

L = I x ω

I = inertia

ω = angular velocity

Answer:

c because that's the answer

She would weigh 31 pounds more on Mars than on Pluto. Therefore option C is correct.

To calculate the differences in weight using the given information.

1. Weight on Earth: 100 pounds

Now, let's calculate the weight differences for Pluto and Mars:

2. Weight on Pluto:

Pluto's gravity is about 0.06 times that of Earth's.

Weight on Pluto = Weight on Earth × Pluto's gravity

Weight on Pluto = 100 pounds × 0.06 = 6 pounds

3. Weight on Mars:

Mars' gravity is about 0.38 times that of Earth's.

Weight on Mars = Weight on Earth × Mars' gravity

Weight on Mars = 100 pounds × 0.38 = 38 pounds

Comparing the weight differences:

Weight difference between Earth and Pluto = 100 pounds - 6 pounds = 94 pounds

Weight difference between Earth and Mars = 100 pounds - 38 pounds = 62 pounds

Therefore, the correct answer is C. She would weigh 31 pounds more on Mars than on Pluto.

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Answer:

Angular momentum is conserved if there are no external forces

P1 = P2

I1 ω1 = I2 ω2

ω2 / ω1 = I1 / I2

If the skater pulls their arms in (I2 < I1) then the angular speed must increase for angular momentum to be conserved.

The acceleration of one of those bugs is equal to 305mi/s.

To calculate the insect's acceleration, the action and reaction force of the impact must be considered.

As the insect will hit the helmet, the force it hits is the same force it receives, so we can make the following expression:

                                          [tex]m_m \times a_m = m_b \times a_b[/tex]

                                        [tex]550 \times 0.0027 = 5 \times 10^{-3} \times a_b[/tex]

Speed ​​has been converted to miles per second

                                          [tex]a_b = 305 mi/s[/tex]

So, the acceleration of one of those bugs is equal to 305mi/s.

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Answer:

308m/s

Explanation:

Let the final velocity, displacent, time taken and initial velocity be V, S, T and U respectively.

Given,

U=0( The bird started from rest)

T= 11s

S=28m

then,

V=U+S×T

or, V=0+11×28

or, V= 308m/s

Answer:

When a sound source moves faster than the speed of sound, a shock wave is produced as the sound waves interfere. A sonic boom is the intense sound that occurs as the shock wave moves along the ground.

More importantly, all of the energy gets concentrated into a very small distance this is called a shock wave. In this case, the observer does not hear the approaching source at all until the shock wave hits with all of the energy in the wave. For sound waves, this can cause a very loud noise, called a sonic boom.

Sonic booms produced by aircraft flying supersonic at altitudes of less than 100 feet, creating between 20 and 144 pounds overpressure, have been experienced by humans without injury. Damage to eardrums can be expected when overpres- sures reach 720 pounds

Explanation:

marke as brainliest

Answer:

The answer is Friction.

Hope this helps :)

Please mark me brainliest :)

Answer:

I believe the answer is A. Contact

Explanation:

Hope that helps

The best description of a well-designed testable question is "The question is clearly stated, the question can be tested in an experiment, and the results can be measured".

This type of question is the one that focuses on facts and aims at testing a hypothesis.

Some features include:

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Answer:

b

Explanation:

Answer:

One piece has a north pole only, and the other piece has à soutn pole only.

Explanation:

mark me brainliest!!

Answer: B

Explanation:

When we split a magnet in half, both halves act as magnets, with each having a north and south pole. As with the original magnet, the matching north and south poles remain on the sides as in the original magnet. This means that the 2 broken sides must be polarized in the opposite direction.

Answer:

M = ρ V = 9 gm/cm^ 3 * cm^3 = 27 gm

a = (V2 - V1) / t = (6 - 2) m/s / 12 s = 1/3 m/s^2     the acceleration

F = M a = 27 gm * 1/3 m/s^2 = 9 dynes      net force applied

Answer:

(if this is correct pls mark this brainly to let me know ty :)

The momentum of the blob of clay before collision which is the same as the initial momentum of the system is 8kgm/s.

Given the data in the question;

Initial momentum of the system; [tex]P = \ ?[/tex]

Momentum is simply the product of the mass of an object and its velocity.

Its is expressed as;

[tex]P = m * v[/tex]

Where m is the mass of the object and v is its velocity.

To determine the initial momentum which is the momentum of the blob of clay before collision, we substitute our given values into the expression above.

[tex]P = m * v\\\\P = 1kg * 8m/s\\\\P = 8kg.m/s[/tex]

Therefore, the momentum of the blob of clay before collision which is the same as the initial momentum of the system is 8kgm/s.

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Answer:

Explanation:

V₁ = <20, -15, 15>, V = <0, 0, 20>

V₂ = V - 2V₁ = <0, 0, 20> - <40, -30, 30> = <-40, 30, -10> = -40i + 30j - 10k

magnitude = [tex]\sqrt{40^2+30^2+10^2}}=51[/tex]

Answer:

energy is neither created nor destroyed; it is transformed and transferred

Explanation:

energy is neither created nor destroyed; it is transformed and transferred

The speed will be calculated by dividing the distance traveled by the object by the time elapsed.

Based on the information given, an overview will be given to you on how to calculate the speed of the cart.

Average speed is a scalar quantity and is gotten by dividing the distance by time taken. For example, if the distance traveled is 100km and the time taken is 4 hours. The speed will be:

= Distance/Time

= 100/4.

= 25km/h.

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Answer:

1.82 seconds

Explanation:

see paper for full explanation :)

h=vi.t+1/2gt²

29.5 = 7.3t+1/2 x 9.8 x t²

4.9t²+7.3t-29.5=0

abc formula⇒ t = 1.82 s

The work done by friction on the roller coaster cart during its motion up the ramp is -813 kJ

The total mechanical energy at the bottom of the tall ramp, E equals the total mechanical energy at the top of the tall ramp, E'

E = E'

U + K + W = U' + K' + W' where

So,

mgh + 1/2mv² + W = mgh' + 1/2mv'² + W' where

Substituting the values of h, W and v' into the equation, and making W' subject of the formula, we have

mgh + 1/2mv² + W = mgh' + 1/2mv'² + W'

mg(0) + 1/2mv² + 0 = mgh' + 1/2mv² + W'

0 + 1/2mv² + 0 = mgh' + 1/2mv² + W'

1/2mv² - 1/2mv² - mgh' = W'

W' = -mgh

Substituing the values of the variables into the equation, we have

W = -mgh

W = 1550 kg × 9.8 m/s² × 53.5 m

W = -812665 kgm²/s²

W = -812665 J

W = -812.665 kJ

W ≅ -813 kJ

So, the work done by friction on the roller coaster cart during its motion up the ramp is -813 kJ

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