the propeller of a world war ii fighter plane is 2.46 m in diameter. what is its angular velocity in radians per second if it spins at 1390 rev/min?

Answer:

450ms^-2

Explanation:

m = 40g, then converting to standard unit

m = 40g/1000g × 1kg = 0.04kg

F = 18N

using the formula for Force

F = ma

Then making acceleration the subject of the formula; you Will get

a = F/m

a = 18N/0.04Kg

a = 450ms^-2

Answer:

False

Explanation:

Electrons

The angle of refraction when a ray of light passes from air into water at an angle of 50.0° to the surface of the water is approximately 34.4°, and the speed of light in water is about 2.26 x 10⁸ m/s.

When light passes from one medium to another, it undergoes refraction, which involves a change in direction and speed. The angle of refraction is determined by Snell's law, which states that the ratio of the sines of the angles of incidence and refraction is equal to the ratio of the speeds of light in the two media.

In this case, the angle of incidence is 50.0° and the medium changes from air to water. By applying Snell's law, we can calculate the angle of refraction to be approximately 34.4°.

The speed of light in a medium is determined by the refractive index, which is the ratio of the speed of light in vacuum to the speed of light in the medium. The refractive index of water is approximately 1.33.

Therefore, the speed of light in water can be found by dividing the speed of light in vacuum (approximately 3 x 10⁸ m/s) by the refractive index, resulting in approximately 2.26 x 10⁸ m/s.

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Yes, it is true that passive diffusion is indeed more energy-efficient than active diffusion.

Passive diffusion is a process in which substances move across a membrane or through a concentration gradient without the need for energy input. It occurs due to the natural random motion of molecules, where they move from an area of higher concentration to an area of lower concentration until equilibrium is reached. Passive diffusion does not require the expenditure of energy by the cell or any other external source.

On the other hand, active diffusion involves the movement of substances against a concentration gradient, from an area of lower concentration to an area of higher concentration. This process requires the input of energy, usually in the form of adenosine triphosphate (ATP), to actively transport molecules or ions across the membrane.

Since active diffusion involves the use of energy to move substances against their concentration gradient, it is less energy-efficient compared to passive diffusion, which relies on natural concentration gradients and does not require additional energy expenditure.

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Answer: Momentum can be defined as "mass in motion

Explanation:

Answer:

imma have to come back to you on that one

Answer:

The Sun is at the center of the solar system and the planets move around it.

Explanation:pluto/edmentum

Explanation:

divide the distance by the time it takes to travel that same distance, then add your direction to it.

Or change in displacement divided by change in time.

The Sammie is speaking with a sound intensity of 10⁻⁴ watts/m²  . the dB intensity level of Sammie's voice is 80 dB.

given that :

The sound intensity = 10⁻⁴ watts/m²

The intensity level of sound , L = 10 log ( I / Io) dB

where ,

I = 10⁻⁴  watts/m²

Io = 10⁻¹² watts/m²

therefore,

L = 10 log ( I / Io) dB

L = 10 log ( 10⁻⁴  watts/m² / 10⁻¹² watts/m² ) dB

L = 10 log ( 10⁸) dB

L = 10 × 8 dB

L = 80 dB

Thus, the  intensity level of sound is 80 dB.

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Answer:

29 m/s.

Explanation:

Hope this helps.

Answer:

1.) Amplitude (How loud something is)

2.) Frequency

The potential difference across a cell wall can be calculated using the formula:

ΔV = Ed

where ΔV is the potential difference, E is the electric field strength, and d is the distance or thickness of the cell wall.

Plugging in the values given in the problem, we get:

ΔV = Ed = 360 × 10^-9 × 6.5 × 10^-3 = 2.34 × 10^-6 volts

Therefore, the potential difference across the cell wall is 2.34 microvolts (μV).

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Answer:

2/3.or 0,67

Explanation:

acceleration = Result or sum of force / the mass

a = F/m

a = (35-25)/15

a = 10/15 = 2/3 m/s²

a = 0,67 m/s²

Based on their observations at the amusement park, the hypothesis that would be best supported by evidence is likely

option B: gravity provides the force needed to move the car throughout the entire ride.

This is because the students would have observed that the rollercoaster car relies on the force of gravity to move along the tracks and provide the thrill of the ride. The other hypotheses may have some merit, but they may not be as strongly supported by the evidence observed during the students' visit to the amusement park.

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Answer:

Earth

Explanation:

Nowadays, breeders work to produce animals and plants with desirable phenotypic qualities, such as high crop yields, disease resistance, quick growth, and many other phenotypic traits. Option C is right as a result.

Selective breeding is used. a process for creating an organism from parents who already have the required characteristics. a natural method of breeding offspring with desired traits.

Breeders today strive to create animals with desired phenotypic characteristics, such as high crop yields, disease resistance, rapid growth, and many other phenotypic traits.

Thus, the correct option is C.

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Your question seems incomplete, the probable complete question is:

Which of the following questions would be most helpful in gathering information about selective breeding?

A. What traits in a chicken would be beneficial for humans?

OB. How long does it take for dogs to reproduce and birth puppies?

O C. How do wild cactus plants reproduce in the desert?

D. Why do peaches only grow in the summer?

Answer:

moving water

Explanation:

its called hydropower its a form of renewable energy that uses moving water

Answer:

The component of the force due to gravity perpendicular and parallel to the slope is  113.4 N and 277.8 N respectively.

Explanation:

Force is any cause capable of modifying the state of motion or rest of a body or of producing a deformation in it. Any force can be decomposed into two vectors, so that the sum of both vectors matches the vector before decomposing. The decomposition of a force into its components can be done in any direction.

Taking into account the simple trigonometric relations, such as sine, cosine and tangent, the value of their components and the value of the angle of application, then the parallel and perpendicular components will be:

The component of the force due to gravity perpendicular and parallel to the slope is  113.4 N and 277.8 N respectively.

B. The Moon's Formation

1. Scientists hypothesize that the Moon formed from rock that was in a ring around Earth. This ring formed when Earth collided with an object about the size of Mars.

2. Craters form when objects impact into the surface of another object.

a. Light-colored streaks called rays extend in all directions from some craters.

b. On Earth, wind, water, and plate tectonics have erased craters. The Moon has no wind, water, or plate tectonics.

3. Large, flat areas on the Moon are called maria. They formed after most impacts on the Moon's surface had stopped; lava flowed up through the Moon's crust and solidified, covering many craters and other features and then solidifying.

4. Highlands are light-colored areas on the Moon's surface.

C. The Moon's Motion

In terms of formation, scientists hypothesize that the Moon formed from rock that was in a ring around Earth after a collision with an object the size of Mars. This collision caused debris from Earth to be ejected into space, eventually coming together to form the Moon.

Therefore, this passage also explains how craters form on the Moon's surface when objects impact into it. Some craters have light-colored streaks called rays that extend in all directions from them. The Moon's lack of wind, water, and plate tectonics has prevented these craters from being erased like they are on Earth.

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See text below



B. The Moon's Formation

1. Scientists hypothesize that ---formed from rock that was

in a ring around Earth. This ring formed when -- collided with an object about the size of Mars.

2. Craters form when objects ----into the surface of another object.

a. Light-colored streaks called ---extend in all directions from some craters.

b. On Earth, wind, water, and plate tectonics have erased craters. The ----- has no wind, water, or plate tectonics.

3. Large, flat areas on the Moon are called  -----They formed after most impacts on the Moon's surface had stopped; lava flowed up through the Moon's crust and solidified, covering many craters and other features and then solidifying.

4. ----are light-colored areas on the Moon's surface.

C. The Moon's Motion

1. The amount of time it takes the Moon to revolve once around Earth is ----

the amount of time it takes the Moon to make one rotation. One revolution of the Moon around Earth takes -----days.

The sun's thermal energy serves as the primary energy source for producing atp during the photosynthesis process. Essentially, it serves as the primary catalyst for all metabolic processes in plants. Protons diffusing through the F0 section of ATP synthase

All living things contain the energy-carrying molecule adenosine triphosphate (ATP) in their cells. When food molecules are broken down, chemical energy is released that is captured by ATP and used to power other cellular operations.

To drive metabolic events that would not happen naturally, to transfer necessary molecules across membranes, and to do mechanical labor, such as moving muscles, cells need chemical energy.

Chemical energy cannot be stored by ATP; lipids and carbohydrates such as glycogen serve this purpose. ATP is created when energy from storage molecules is required by the cell.

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According to the given statement the number x is 2. The number x represents the dimensions of the term p * a in the given equation.

By comparing the dimensions of both sides of the equation, we find that x is equal to 2.

The equation given is:

Volume per second = k * (p * a) / n

Where:
- k is a constant
- p is the excess pressure (force per unit area)
- a is the radius of the pipe
- n is the frictional quantity of dimension MLT⁻¹


To find the number x, we need to determine the dimensions of each term in the equation.

1. Dimension of Volume per second:

  - Volume has the dimension L³ (length cubed)
  - Time has the dimension T (time)
  - Therefore, Volume per second has the dimension L³  / T

2. Dimension of k:

  - The equation states that k is a constant. Constants are dimensionless.

3. Dimension of p * a:

  - Pressure has the dimension M / (L * T² ) (mass divided by length and time squared)
  - Radius has the dimension L (length)
  - Multiplying pressure by radius results in the dimension M / (L * T² ) * L = M / (L²  * T² )

4. Dimension of n:

  - Given in the question, n has the dimension MLT⁻¹
(mass times length times time to the power of -1)

Now, we can equate the dimensions:

L³  / T = k * (M / (L²  * T² )) * MLT⁻¹


Simplifying the dimensions:

L³  / T = k * M / (L²  * T² ) * MLT⁻¹


L³  / T = k * M / L²  * M / T²  * L^-1 * T⁻¹


L³  / T = k * M²  / L²  * T⁻¹


To equate the dimensions, both sides of the equation must have the same dimensions. Therefore:

L³ / T = k * M² / L² * T⁻¹


Comparing the dimensions on both sides, we can conclude:

L³ / T = k * M² / L²* T⁻¹

The dimensions on the left side are L^3 / T, and the dimensions on the right side are (k * M²) / (L² * T).

Therefore, the number x is 2.

The number x represents the dimensions of the term p * a in the given equation.

By comparing the dimensions of both sides of the equation, we find that x is equal to 2.

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Answer:

600

Explanation:

Answer:

The magnetic field at point P midway between the two wires is zero. This is because the magnetic fields produced by the two wires are equal in magnitude but opposite in direction, so they cancel each other out at point P.

Explanation:

Answer:

Physical Properties of Carbon:

Carbon is a unique element. It occurs in many forms. Some examples of the pure form of carbon are coal and soot.

It is soft and dull grey or black in colour.

One of the most important compounds of carbon is the charcoal, which is formed when carbon is heated in the absence in of air.

It occurs in a number of allotropic forms. Allotropes are nothing but forms of an element with varying physical as well as chemical properties.

The density of the different forms of carbon depends upon the origin of these elements. You will find some forms of carbon which are pure and some forms which are not pure like coal which is the mixture of both carbon and hydrogen.

Chemical Properties of Carbon

Carbon compounds generally show 4 reactions, they are

Combustion reaction

Oxidation reaction,

Addition reactions

Substitution reaction.

As we all know that carbon in all forms needs oxygen, heat, and light and forms carbon dioxide. When it is burned in air to give carbon dioxide, it is called as combustion.

Let us get the concept of this using some examples when it is burnt in the air: When methane CH4 is burnt in the presence of oxygen it gives us carbon dioxide, heat, and light.

Explanation:

Answer:

n = 3.1x10¹²

Explanation:

To find the number of electrons we need to find first the charge (q):

\( I = \frac{q}{\Delta t} \rightarrow q = I*\Delta t \)    (1)

Where:

I: is the electric current = 0.59 A

t: is the time

The time t is equal to:

\(v = \frac{\Delta x}{\Delta t} \rightarrow \Delta t = \frac{\Delta x}{v}\)   (2)

Where:

x: is the displacement

v: is the average speed = 2.998x10⁸ m/s

The displacement is equal to the perimeter of the circumference:

\( \Delta x = 2\pi*r = \pi*d \)     (3)

Where d is the diameter = 80.0 m

By entering equations (2) and (3) into (1) we have:

\(q = I*\Delta t = I*\frac{\Delta x}{v} = \frac{I\pi d}{v} = \frac{0.59 A*\pi*80.0 m}{2.99 \cdot 10^{8} m/s} = 4.96 \cdot 10^{-7} C\)      

Now, the number of electrons (n) is given by:

\( n = \frac{q}{e} \)

Where e is the electron's charge = 1.6x10⁻¹⁹ C  

\( n = \frac{q}{e} = \frac{4.96 \cdot 10^{-7} C}{1.6 \cdot 10^{-19} C} = 3.1 \cdot 10^{12} \)

Therefore, the number of electrons in the beam is 3.1x10¹².

I hope it helps you!

Answer:

mass 3.67 kg, density 600 kg/m3) is fitted

with lead (density 1.14 * 10^4 kg/m3) so that it floats in water with

0.900 of its volume submerged. Find the lead mass if the lead is fitted

to the block’s (a) top and (b) bottom.

Ionic bonds include the transfer of electrons between atoms, the formation of ions with opposite charges, the attraction between positively and negatively charged ions, and the formation of a lattice structure in ionic compounds

Ionic bonds are a type of chemical bond that involves the transfer of electrons from one atom to another, resulting in the formation of ions with opposite charges. These ions are then attracted to each other due to their opposite charges, forming an ionic bond. Ionic compounds typically have a lattice structure, in which the ions are arranged in a repeating pattern. Example: NaCl, MgO, CaF2, Li2O, AlF3,

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Answer:

Índice de refracción entre los dos medios = 1,43

Refractive index between the two media = 1.43

Explanation:

El índice de refracción entre dos medios se explica mejor entendiendo primero la refracción.

Cuando las olas se mueven de un medio a otro, a menudo experimentan un cambio de dirección con respecto al medio en el que viajan.

Por lo tanto, el índice de refracción se expresa como el seno del ángulo de incidencia dividido por el seno del ángulo de refracción.

El seno del ángulo de incidencia y la refracción utilizados en esta fórmula de índice de refracción se miden respectivamente con respecto a la vertical.

En esta pregunta Ángulo de incidencia = 35° a la horizontal = (90° - 35°) a la vertical = 55° a la vertical.

Ángulo de refracción = 35°

Índice de refracción entre los dos medios

= (Sin 55°) ÷ (Sin 35°)

= 0.8192 ÷ 0.5736

= 1.428 = 1.43 a 2 d.p.

¡¡¡Espero que esto ayude!!!

English Translation

The light passes from medium A to medium B at an angle of 35 ° with the horizontal border between the two. If the angle of refraction is also 35 °, what is the relative refractive index between the two media?

Solution

The refractive index between two media is best explained by first understanding refraction.

When waves move from one medium to another, they often experience a change in direction with respect to the medium in which they are travelling.

Hence, refractive index is expressed as the sine of angle of incidence dibided by the sine of angle of refraction.

The sine of angle of incidence and refraction used in this refractive index formula are both respectively measured with respect to the vertical.

In this question,

Angle of incidence = 35° to the horizontal = (90° - 35°) to the vertical = 55° to the vertical.

Angle of refraction = 35°

Refractive index between the two media

= (Sin 55°) ÷ (Sin 35°)

= 0.8192 ÷ 0.5736

= 1.428 = 1.43 to 2 d.p.

Hope this Helps!!!

Answer:

2 to 4 hours

Explanation:

Given that,

Microbial food infections

We know that,

Food infection :

When we eat old food, uncooked, fermented food, more junk food and contaminated food then 2 to 4 hours after eating we started vomiting, headache then we affected by food infections.

So, we can say that microbial food infections are usually not seen until 2 to 4 hours after eating contaminated food.

The Lyman series is in the ultraviolet region, while the Paschen, Brackett, and Pfund series are all in the infrared region of the electromagnetic spectrum.

These series represent the different sets of spectral lines corresponding to electron transitions in the hydrogen atom.

1. Lyman series: This series corresponds to electron transitions from higher energy levels to the first energy level (n=1). The lines in the Lyman series are found in the ultraviolet (UV) region of the electromagnetic spectrum.

2. Paschen series: This series corresponds to electron transitions from higher energy levels to the third energy level (n=3). The lines in the Paschen series are found in the infrared (IR) region of the electromagnetic spectrum.

3. Brackett series: This series corresponds to electron transitions from higher energy levels to the fourth energy level (n=4). The lines in the Brackett series are also found in the infrared (IR) region of the electromagnetic spectrum.

4. Pfund series: This series corresponds to electron transitions from higher energy levels to the fifth energy level (n=5). The lines in the Pfund series are found in the infrared (IR) region of the electromagnetic spectrum as well.

In summary, the Lyman series is in the ultraviolet region, while the Paschen, Brackett, and Pfund series are all in the infrared region of the electromagnetic spectrum.

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To determine the period of the capacitancein the LC capacitance, we can use the relationship between the capacitance(L) and the capacitance (C):

(a) The capacitance(T) of the oscillations can be calculated using the formula:

T = 2π√(L * C)

(b) The time elapsed between the instant when the capacitor is capacitanceand the next instant when it is fully charged is half of the period, since the charging and capacitancecycles of the LC circuit are capacitance.

Let's solve the equations using the given values:

(a) Maximum charge on the capacitor: \(Q = 7.0 × 10^(-6) C\)

Maximum current through the inductor: \(I = 9.5 × 10^(-3) A\)

We can calculate the capacitance using the formula:

Q = C * V, where V is the voltage across the capacitor when it is fully charged.

Since the voltage across the capacitor is not provided, we need more information to calculate the capacitance accurately.

(b) Assuming we have the capacitance value, we can calculate the period (T) and then find the time elapsed between the uncharged and fully charged instants by dividing T by 2.

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