What causes wind?
A
The sun stops the wind throughout the afternoon as everything warms up.
B
The sun causes waves to be larger by directing solar energy into the water.
C
The sun heats land quickly and as the warm air rises, cool air comes in to take it place.
D
The sun reflects off the water, making the air above the water unstable and more likely to move.

The distance of separation between the two masses is 0.927 m.

This is the force that exists between two masses in the universe.

To calculate the distance of separation of the masses, we use the formula below.

Where:

Make r the subject of the equation.

From the question,

Given:

Substitute these values into equation 2

Hence, The distance of separation between the two masses is 0.927 m

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The wavelength of sodium emissions is 589 nm (5.89 × 10⁻⁷ meters), with a frequency of approximately 5.09 × 10¹⁴ Hz. A single photon at this wavelength has an energy of 3.37 × 10⁻¹⁹ joules.

The wavelength of light is typically measured in meters. To convert from nanometers (nm) to meters, we divide the value by 10⁹, since there are 10⁹ nanometers in a meter. Therefore, the wavelength of sodium emissions, which is 589 nm, can be expressed as 5.89 × 10⁻⁷ meters. The frequency of light is inversely proportional to its wavelength. The relationship between frequency (f) and wavelength (λ) is given by the equation f = c/λ, where c represents the speed of light. By substituting the known values, we can calculate the frequency. The speed of light is approximately 3 × 10⁸ meters per second. Therefore, the frequency of light with a wavelength of 589 nm is approximately 5.09 × 10¹⁴ Hz. The energy of a photon can be determined using the equation E = hf, where E represents energy, h is Planck's constant (approximately 6.63 × 10⁻³⁴ J·s), and f is the frequency of the light. We have already calculated the frequency in the previous answer as approximately 5.09 × 10¹⁴ Hz. By substituting these values into the equation, we find that the energy of a single photon with a wavelength of 589 nm is about 3.37 × 10⁻¹⁹ joules. To determine the energy of a mole of photons, we need to multiply the energy of a single photon by Avogadro's number (approximately 6.022 × 10²³). By doing this calculation using the energy we obtained in the previous answer (3.37 × 10⁻¹⁹ joules), we find that the energy of a mole of photons with a wavelength of 589 nm is approximately 2.03 × 10⁴ joules. The electron transition from n=4 to n=2 has a higher energy difference. The energy difference between electron energy levels in an atom can be calculated using the equation ΔE = E₂ - E₁, where ΔE represents the energy difference, and E₂ and E₁ are the energies of the final and initial states, respectively. In this case, the transition from n=4 to n=2 will have a higher energy difference compared to the transition from n=6 to n=2 since the energy difference is inversely proportional to the principal quantum number (n). As n decreases, the energy difference increases. The energy of a photon emitted during an electron transition is directly proportional to the energy difference between the initial and final states. In this case, the transition from n=6 to n=2 will result in a higher energy photon emission compared to the transition from n=4 to n=2 since the energy difference is larger for the former transition. Therefore, the electron transition from n=6 to n=2 emits the higher energy photon.

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The mass flow rate in the narrow section of the pipe is closest to option A, which is 1.25 kg/s

The mass flow rate in the narrow section of the pipe can be calculated by using the principle of continuity. According to this principle, the mass flow rate of a fluid in a closed system must remain constant, which means that the product of the fluid's density, velocity, and cross-sectional area must remain constant. In this case, we know that the density of water is 1000 kg/m, and the velocity of the water is 0.50 m/s.
Firstly, we need to calculate the cross-sectional area of the narrow section of the pipe. The diameter of the narrow section is 0.05 m, which means that the radius is 0.025 m. Therefore, the cross-sectional area of the narrow section of the pipe is πr² = 0.00196 m².
Secondly, we can calculate the mass flow rate in the narrow section of the pipe using the formula: mass flow rate = density x velocity x area. Substituting the values, we get:
mass flow rate = 1000 kg/m³ x 0.50 m/s x 0.00196 m² = 0.98 kg/s
Therefore, the mass flow rate in the narrow section of the pipe is closest to option A, which is 1.25 kg/s.

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Answer:

speed and velocity are different because speed is the distance traveled per unit time but the velocity is displayed displacement per unit time is tourism scalar quantity and velocity is a vector quantity speed is always positive but velocity can be positive

The force constant of the spring is 200.696 N/m & The height the object achieves when the spring releases its energy is 2.5087 m

The spring constant is the force needed to stretch or compress a spring, divided by the compressive or expansive distance. It's used to determine stability or instability in the spring, and therefore the system it's intended for. we know,

F = kx

Therefore,

k = F/x

We also know that the force being exerted on the spring is equal to the mass of the object. Hence, F = mg = 5.13 * 9.8 N = 50.174 N and we know compression due to the mass is 0.25m. Therefore,

K = 50.174/0.25 N/m

K = 200.696 N/m

Therefore, The Spring Constant is 200.696 N/m

On release, the spring potential energy gets converted to kinetic energy. Hence, on release, the height attained by the object is given by:

h = \(1/2 kx^{2}\)

We know that k=200.696 N/m and x=0.25 m. Therefore the height is:

h = \(1/2 (200.696 N/m)(0.25 m)^{2}\)

h = 2.5087 m

Therefore, the force constant of the spring is 200.696 N/m & The height the object achieves when the spring releases its energy is 2.5087 m

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Answer:

We know that F=ma

the force required depends on acceleration as well as the mass.

if a person has bag means the total mass is of course large

so force is also large

then it becomes difficult

As the electric field gets stronger, the distance between equipotential lines decreases.

Equipotential lines are hypothetical paths through space that link places with an identical electric potential. Equipotential lines, then, are a group of electric field sites where the electric potential is constant. These lines enable a way to see and comprehend the electric field in a specific area because they are always perpendicular to the electric field lines at every point.

In several branches of physics, including electrostatics, electromagnetism, and quantum mechanics, equipotential lines are helpful. They are used to explain and comprehend how charged particles and electric fields behave.

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For Question 3, the statement that is NOT true when adding vectors is the same as the Pi method used for resolving a vector into its components.

When adding vectors, the Pi method is not used for resolving a vector into its components. The Pi method, also known as the method of trigonometric components, is used to break down a single vector into its horizontal and vertical components. It involves using trigonometric functions (such as sine and cosine) to determine the magnitudes of the components.

On the other hand, when adding vectors, the tip-to-tail method is commonly used. It involves placing the vectors head-to-tail and drawing an arrow from the tail of the first vector to the tip of the last vector. The resulting arrow represents the sum or resultant of the vectors. The parallelogram method can also be used, which involves constructing a parallelogram using the vectors and drawing the resultant vector from the common point of the parallelogram.

Therefore, the statement that is NOT true when adding vectors is that the Pi method is used for resolving a vector into its components.

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Entropy changes that are positive (+) indicate more chaos. The entropy of the universe is increasing. The entropy of a universe increases whenever there is any spontaneous change.

As the ice melts, the molecules grow disorganised as they are now able to move about. The water is then heated to transform into a gas, releasing the molecules to move freely through space. Both of the above reactions would have a positive entropy (DS).

Positive entropy indicates an increase in randomness in a system. Positive entropy processes include boiling and evaporation. A system has less randomness when the entropy is negative. A few instances of negative entropy processes include freezing and condensation.

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Answer:

force of gravity; weight

Explanation:

Weight is the force of gravity on an object and it is measured in Newtons. On this spring scale, each line equals one Newton.

Answer:

Opposite

Explanation:

Newton's third law of motion states that for every action there is an equal but opposite reaction.

Action-reaction force pairs make it possible for fishes to swim, birds to fly, cars to move etc,

For example, while driving down the road, a firefly strikes the windshield of a car (Action) and makes a quite obvious mess in front of the face of the driver (Reaction) i.e the firefly hit the car and the car hits the firefly.

The ultimately implies that, in every interaction, there is a pair of equal but opposite forces acting on the two interacting physical objects.

Hence, whenever any physical object exerts a force (action) on another physical object, the second physical object exerts a force (reaction) of the same amount, but acting in opposite direction to that of the first physical object.

Answer:

mhibyguftyftfrehlknmjhbn

Explanation:

njhvvtfryvbnyuhnuihnjhk

Answer:

Hypothesis #2 If an earthworm is exposed to a strong odor, then it will back away from the odor because it will think that the odor is a sign of danger. ... Second, you will test earthworms' response to dry conditions by providing both a dry surface and a moist surface for the earthworms to crawl on.

Answer:

if the earthworm smells the strong odor it will back away from it because it thinks it's a sign of danger.

Answer:

Since gravitational force is inversely proportional to the square of the separation distance between the two interacting objects, more separation distance will result in weaker gravitational forces. So as two objects are separated from each other, the force of gravitational attraction between them also decreases.

Answer:derp

Explanation:

Adding an additional resistance of approximately 10.99 Ω across the existing 1.1 Ω resistance will make the total resistance exactly 1 Ω.

If the resistance between two points in an electrical circuit is already 1.1 Ω and you want to add an additional resistance to make the total resistance exactly 1 Ω, you need to calculate the value of the additional resistance required.

Let's denote the value of the additional resistance as Radditional.

To find Radditional, we can use the formula for resistors in parallel

1 / Rtotal = 1 / R1 + 1 / Radditional

Since the resistance between the two points in the circuit is already 1.1 Ω and you want the total resistance to be 1 Ω, we can substitute these values into the equation:

1 / 1 = 1 / 1.1 + 1 / Radditional

Simplifying the equation:

1 = 0.9091 + 1 / Radditional

Rearranging the equation to solve for Radditional:

1 / Radditional = 1 - 0.9091

1 / Radditional = 0.0909

Radditional = 1 / 0.0909

Radditional = 10.99 Ω

Therefore, adding an additional resistance of approximately 10.99 Ω across the existing 1.1 Ω resistance will make the total resistance exactly 1 Ω.

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Answer:

Thermosphere A,B

Mesosphere B,C,D

Stratosphere D,E,F

Troposphere G

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The overall amount of atomic orbitals that go into creating a molecular orbital is equal to that number. Two H protons make up a chemical H2, which is.

The sun is one of most significant energy sources. Almost all of the energy on earth comes from the sun, which is where it all began. Sunlight provides us with solar thermal energy and can also be used by solar (photovoltaic) cells to generate electricity.

Because it is a core human requirement, power plays a significant role in our daily lives. Our living thing constructions are not only heated by energy, but also cooled by it.

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Answer:

Technician A

Explanation:

Technician A is correct because, the hand force required is not supposed and even should not exceed 80 lb.

On the other hand, the foot force limit is even higher at 100 lb. Thus, the required foot force break should not exceed 100 lb. We are given 80 lb in the question, which is quite less than 100 lb. It could exceed 80, but must not exceed 100. Thus only Technician A is correct among them both.

Answer:

1. A proton's magnetic moment arises from a fundamental quantum property called spin, which causes the proton to behave as a tiny bar magnet with a north and a south pole. When placed in an external magnetic field, the proton's spin can either align with the field or flip to orient itself against the field

2. The force can change the direction (velocity) of the proton but not its speed (magnitude).

Answer:

but the answer should be no as if 3 bulbs are connected together if one burns out the whole circuit will stop .hope you understood

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Answer:

Initial y-component of speed

Vy = 28 * sin 30 = 14 m/sec vertically

1/2 m Vy^2 = 2 m g h    conservation of energy of y-component

h = Vy^2 / (2 * g) = 14^2 / (2 * 9.8) = 10 m

Answer:

Here, we have

Initial velocity, u = 0 m/s (As starts from rest)

Acceleration, a = 2 m/s².

Time taken, t= 310 min = 310 × 60 = 18600 seconds

To Find,

Final velocity, v and,

Distance covered, s

Formula to be used,

1st and 3rd equation of motion,

v = u + at and v² - u² = 2as

So, putting all the values, we get

V = u + at

v = 0 + 2 x 18600

v = 2 x 18600 → v = 37200 m/s.

Hence, the final velocity is 37200 m/s.

Now, Distance covered,

v² - u²= 2as

(37200 )² - (0)² = 2 x 2 x s

1,383,840,000 = 4s → s = 345,960,000m

Hence, the distance covered is 345,960,000 m.

object 1 and object 2 have the same mass and are moving at the same speed. TRUE

The given statement is true because the momentum of an object is defined as mass multiplied by velocity. And both of these objects have the same mass which means the first condition is satisfied and secondly they have the same velocity too. Thus the second condition is also satisfied.

Thus we can say that the momentum of both the objects will be the same.

As momentum depends on both velocity and the direction of the body's motion, it is quantified by "mass velocity". Since velocity is a vector and mass is a scalar, momentum is a vector quantity. Mass times speed equals momentum. p = mv.

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The given function is given as:

C()=10+14-0.028i

Here, C() is the temperature of the bottle of water at i minutes after being placed in the cooler.

Lena wants to drink the water when it reaches a temperature of 21 degrees Celsius. So, we need to find out how many minutes should Lena leave it in the cooler. Let's put the value of C() in the given function 21 = 10 + 14 - 0.028i 0.028i = 14 - 10 + 21 0.028i = 25 i = 25/0.028 i ≈ 892.857 We get i ≈ 892.857.

This means Lena should leave the bottle of water in the cooler for about 892.857 minutes to reach the temperature of 21°C. So, she should leave it in the cooler for 892.9 minutes (rounded to the nearest tenth). Hence, the answer is 892.9 minutes.

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The Sun has completed approximately 20-30 orbits around the Milky Way galaxy during its lifetime

The Sun's motion within the Milky Way is also affected by these gravitational forces, as well as by its own movement through space. The Sun orbits the center of the Milky Way along with billions of other stars in the galaxy's disk. However, the Sun's exact path is not a simple circular orbit, but a complex and somewhat irregular path that takes it above and below the plane of the galaxy at various points in its orbit.

Additionally, the Milky Way itself is also moving through space, as it is influenced by the gravity of nearby galaxies and other large-scale structures in the universe. This means that the Sun's orbit around the Milky Way is not a fixed path, but a constantly changing trajectory that is influenced by many different factors.

All of these factors make it difficult to precisely determine how many times the Sun has orbited the Milky Way. However, based on current estimates of the age of the Sun and the Milky Way, it's believed that the Sun has completed roughly 20-30 orbits around the galaxy during its lifetime.

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Ohm's law describes the relations among voltage, current and resistance. So that:

i. The resistance needed to generate the given current is 480 Ohm's.

ii. At medium speed, the resistance decreases while the current increases.

iii. The high speed requires large current but least resistance.

Ohm's law states that:  V = IR

where V is the voltage, I is the current and R is the resistance.

Thus from the given question, V = 120 V, and A = 0.25, so that:

R = \(\frac{V}{I}\)

  = \(\frac{120}{0.25}\)

R = 480 Ohm's

Therefore, the resistance required to generate a current of 0.25 A at low speed is 480 Ohm's.

Ohm's law explains that the voltage is proportional to current so that to generate greater amount of current, low resistance is required. Thus, at the medium speed, more current would be required so that the value of resistance to produce the current would be lesser than that at the low speed.

At higher speed, the value of resistance would reduce far below that attained in medium speed, so that more current would be produced. Thus the high speed requires large current but low resistance.

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The answer is 480Ω.

According to Ohm's Law, the required equation to find resistance is :

\(\boxed {R = \frac{V}{I}}\)

Then, by direct substitution, we get :

For medium and higher speeds, the resistance would have to decrease in order to allow for more current to reach the fan. For it to operate at the necessary speeds, the resistance would have to be less than 480Ω.

B 10,000 - 30,000 K Blue-white stars

A 7,500 - 10,000 K White stars

F 6,000 - 7,500 K Yellow-white stars

G 5,000 - 6,000 K Yellow stars (like the Sun)

The lowest temperature stars are red while the hottest stars are blue. Astronomers are able to measure the temperatures of the surfaces of stars by comparing their spectra to the spectrum of a black body.