Diego hypothesizes that the Earth wobbles on its axis in a pattern that is repeated every 20,000 years.

Which of the following ways would be the best way to test Diego's hypothesis?
A.
conduct a controlled experiment
B.
observe the movement of other planets
C.
make observations in nature
D.
make a model

The reason why the planets orbit the Sun without crashing into it is because of (C) the force of gravity. Although there is no gravity in space, the Sun's gravity pulls the planets towards it. However, the planets are also moving, which causes their trajectories to bend around the Sun instead of leading directly into it. This means that they continue to move in a circular or elliptical orbit around the Sun. Therefore, option B is the correct answer. All astronomical objects do not move in circular orbits, as some may have elliptical or other types of trajectories.

This is because the planets have both gravitational attraction towards the Sun and their own velocity, which keeps them moving in their orbits. The combination of these two factors causes the planets to follow curved trajectories around the Sun, preventing them from crashing into it.

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Answer:

50 seconds

Explanation:

40 divided by 0.8 = 50

Hydroelectric strength is generated from each hydroelectric dams and ocean tides via the usage of water float and its kinetic strength. Here's a top level view of how electricity is generated from every of these assets:

Hydroelectric Dams:

Ocean Tides:

Thus, this way, electricity generated from hydroelectric dams or ocean tides.

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Answer:

the sun?

Explanation:

Answer:

the sun

Explanation:

The pressure as a function of the distance from the surface is 101325 + 10055.25h

One must go h = 10.1 m down before the pressure is 1 atm greater than the pressure at the surface.

In order to determine absolute pressure, a complete vacuum is used. In contrast, gauge pressure is the amount of pressure that is measured in relation to atmospheric pressure, also referred to as barometric pressure. The average barometric pressure at sea level is 14.7 PSIA, while the absolute pressure of a complete vacuum is 0 PSIA.

The pressure at sea level =  1 atm = 101325 Pa

Density of sea water = 1025 kg/ m^(3)

Pressure due to fluid height = pgh

Absolute pressure = 101325 + 1025(9.81) h

= 101325 + 10055.25h

where h= 0 at sea level at increases downward

101325 = 1025(9.81)h

h = 10.1 m

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The complete question is:

"If the water in a lake is everywhere at rest, what is the pressure as a function of distance from the surface? The air above the surface of the water is at standard sea-level atmospheric conditions. How far down must one go before the pressure is 1 atm greater than the pressure at the surface?"

Answer:

y = 1.19 m

Explanation:

For this exercise, let's use the projectile launch ratios, find the components of the initial velocity

          sin 26 = v_{oy} / v₀

          cos 26 = v₀ₓ / v₀

          v_{oy} = v₀ sin  26

          v₀ₓ = v₀ cos 26

          v_{oy} = 11.3 sin 26 = 4.95 m / s

          v₀ₓ = 11.3 cos 26 = 10.16 m / s

Let's find the time it takes to cross the river

            x = v₀ₓ t

            t = x / v₀ₓ

            t = 6.27 / 10.16

            t = 0.617 s

now with that time we can find how high the body is

           y = y₀ + v_{oy} t - ½ g t²

let's calculate

           y = 0 + 4.95 0.617 - ½ 9.8 0.617²

           y = 1,189 m

the result must have three significant figures

           y = 1.19 m

Trigonal, 120 degree, the ideal bond angles are 120° when there are three electron domains encircling an atom.

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Answer: The inner core is solid, the outer core is liquid, and the mantle is solid/plastic. This is due to the relative melting points of the different layers (nickel–iron core, silicate crust and mantle) and the increase in temperature and pressure as depth increases.

Explanation: I just did a quiz with this question

The focal length of the contact lens is approximately 26.4 cm

The focal length of the lens can be calculated using the lens maker's formula. For a thin lens, this formula is given by:

\(\frac{1}{f} = (n-1)(\frac{1}{R1}-\frac{1}{R2} )\)

Where f is the focal length of the lens, n is the refractive index of the material of the lens, R1 is the radius of curvature of the first surface of the lens and R2 is the radius of curvature of the second surface of the lens.

Plugging in the given values, we get:

\(\frac{1}{f} = (1.52 - 1)(\frac{1}{0.0207}-\frac{1}{0.0252} )\)

Simplifying this expression, we get:

1/f = 37.8 m⁻¹

Solving for f, we get:

f = 0.0264 m = 26.4 cm

As a result, the contact lens's focal length is roughly 26.4 cm.

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The ground state wave function and energy of the isotropic two-dimensional harmonic oscillator, the Schrödinger equation for this system.

The Schrödinger equation for a 2D isotropic harmonic oscillator is:

(E - H) Ψ(x, y) = 0

- E is the energy eigenvalue

- H is the Hamiltonian operator

- Ψ(x, y) is the wave function of the system

The Hamiltonian operator for this system is given as:

H = - (ħ^2 / (2m)) * (d^2/dx^2 + d^2/dy^2) + (1/2) * k * (x^2 + y^2)

Now, let's solve the Schrödinger equation for the ground state wave function and energy.

1. Ground State Wave Function:

In the ground state, the wave function Ψ(x, y) will be the lowest energy eigenstate. We can assume that the wave function separates into a product of two independent wave functions, one in the x-direction (Φ(x)) and one in the y-direction (Φ(y)):

Ψ(x, y) = Φ(x)Φ(y)

The ground state wave function will correspond to the lowest energy state, which is the solution to the Schrödinger equation. By applying the Hamiltonian operator to the wave function and setting it equal to the energy eigenvalue, we can solve for Φ(x) and Φ(y).

(d^2Φ(x)/dx^2) + (d^2Φ(y)/dy^2) + (2m / ħ^2) * [E - (1/2) * k * (x^2 + y^2)] * Φ(x)Φ(y) = 0

Since the equation separates into two independent variables, we can write it as:

(d^2Φ(x)/dx^2) + (2m / ħ^2) * [E_x - (1/2) * k * x^2] * Φ(x) = 0

and

(d^2Φ(y)/dy^2) + (2m / ħ^2) * [E_y - (1/2) * k * y^2] * Φ(y) = 0

Here, E_x and E_y represent the energies in the x-direction and y-direction, respectively.

The solutions to these equations are Hermite polynomials for the x-direction and y-direction. The ground state wave function will correspond to the lowest energy state, which is the solution with the lowest energy eigenvalue.

2. Ground State Energy:

The ground state energy is the lowest energy eigenvalue obtained from the solution of the Schrödinger equation for the ground state wave function.

3. Energy of the First Excited State:

The first excited state energy will correspond to the next higher energy eigenvalue obtained from the solution of the Schrödinger equation.

4. Degeneracy:

The degeneracy of a system refers to the number of distinct states that have the same energy. In the case of the isotropic two-dimensional harmonic oscillator, the degeneracy arises due to the fact that multiple combinations of quantum numbers (n_x, n_y) can yield the same energy. The degeneracy is related to the possible values of the quantum numbers and is specific to the system's energy levels.

To obtain the exact ground state wave function, ground state energy, and energy of the first excited state, further mathematical calculations are required using the specific form of the Hamiltonian and solving the corresponding differential equations.

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Answer:huh

Explanation:

Answer:

Friction is a force that rubs on a object which then causes something within that object to happen. There are many types of friction, though.

Explanation:

brainliest? :{

Answer:

Well I don't think there is a specific answer for that, but a lot of under the age children do drink and smoke,because these days,their parents either don't care, and some just don't know about it. Many kids drink and smoke these days and I don't think there is a on point percentage.

Explanation: Hope this helps and have a good day!!!

Answer:

See the chart below! :)

Explanation:

See the chart below! :)

The potential energy of Nan suitcase of mass 14 kg is 54.88 J.

Potential energy is the energy of a body due to its position in the gravitational field.

To calculate the potential energy, we use the formula below

Formula:

Where:

From the question,

Given:

Substitute these values into equation 1

Hence, the potential energy is 54.88 J.

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The final speed of the car at the given conditions is 30.1 m/s.

The given parameters:

The change in the energy applied to the car is calculated as;

\(\Delta E = E_1 - E_2\\\\\Delta E = 22,000 \ J \ - \ 3,666.67 \ J\\\\\Delta E = 18,333.33 \ J\)

The final speed of the car is calculated as follows;

\(\Delta E = \frac{1}{2} m(v_f^2 - v_0^2)\\\\v_f^2 - v_0^2 = \frac{2\Delta E}{m} \\\\v_f^2 = \frac{2\Delta E}{m} + v_0^2\\\\v_f = \sqrt{ \frac{2\Delta E}{m} + v_0^2} \\\\v_f = \sqrt{ \frac{2\times 18,333.4}{1700} + (21)^2} \\\\v_f = 30.1 \ m/s\)

Thus, the final speed of the car at the given conditions is 30.1 m/s.

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\(\boxed{\sf v^2-u^2=2gh}\)

\(\\ \sf\longmapsto h=\dfrac{v^2-u^2}{2g}\)

\(\\ \sf\longmapsto h=\dfrac{0^2-15.5^2}{2(10)}\)

\(\\ \sf\longmapsto h=\dfrac{240.25}{20}\)

\(\\ \sf\longmapsto h=12.012m\)

Answer:

Usually when climbing, it's best to be in the small front ring and the largest back ring. If your cadence is about 100 rpm, then whatever gear you're in is fine. It depends on the road, but as long as your pedaling is at a level you're comfortable with, you're fine.

Explanation:

Google answer by the way.

Answer:

The first graph

Explanation:

Graph A shows acceleration.

Answer:

Explanation:

en un movimiento sísmico?

The ecological footprint finds the person demand on natural demand.

The ecological footprint is the method promoted by the Global Footprint Network to find human demand on natural capital. The quantity of nature it takes to support people or an economy. It tracks this demand through an ecological accounting system.

Some things which could do to reduce your footprint is Reduce Your Use of Single-Use, Disposable Plastics, Switch to Renewable Energy, Eat Less Meat, Reduce your Waste, Recycle Responsibly, Drive Less, Reduce Your Water Use, Support Local.

Thus, the ecological footprint is to find person demand on natural demand.

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The electric vehicle travels a total distance of 484.85 meters from start to stop. For the acceleration phase, we can use the following kinematic equation:

v^2 = u^2 + 2as

where v is the final velocity (20 m/s), u is the initial velocity (0 m/s), a is the acceleration (1.1 m/s^2), and s is the distance traveled during acceleration. Solving for s, we get:

s = (v^2 - u^2) / (2a)

s = (20^2 - 0^2) / (2 x 1.1)

s = 181.82 m

Therefore, the distance traveled during the acceleration phase is 181.82 meters.

We can use the same equation for the deceleration phase but with the deceleration rate of 3.3 m/s^2 and the final velocity of 0 m/s.

s = (v^2 - u^2) / (2a)

s = (0^2 - 20^2) / (2 x -3.3)

s = 303.03 m

Note that we used a negative acceleration value since the deceleration is in the opposite direction to the vehicle's initial motion.

Therefore, the distance traveled during the deceleration phase is 303.03 meters. The total distance traveled by the electric vehicle from start to stop is the sum of the distances traveled during acceleration and deceleration:

total distance = 181.82 + 303.03

total distance = 484.85 meters

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The number of moles of gas present is 0.0850 mol

Given

initial volume of the gas \(v_{i}\)= 0.80 L

final volume of the gas \(v_{f}\) = 3.0L

work done by the gas, W = 280 J

constant temperature, T = 300 K

gas constant, R = 8.31 J/mol.K

work done by gas at constant temperature is given as;

\(W= \int\limits^a_b {P} \, dv\)

where a =final volume of the gas

and b = initial volume of the gas

W=nRT*ln\((\frac{v_{f} }{v_{i} } )\)

\(n=\frac{W}{RT*ln\frac{v_{f} }{v_{i} } }\)

\(n=\frac{280}{8.31*300*ln\frac{3}{0.80 } }\)

n=0.0850 mol

Therefore, the number of moles of gas present is 0.0850 mol

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A focal ray from an object, after passing through a converging lens, proceeds in the following direction:a) The ray passes through the focal point F .

A converging lens, also known as a convex lens, focuses incoming parallel rays towards a single point known as the focal point. When a focal ray, which is a ray parallel to the principal axis, enters the converging lens, it refracts in such a way that it passes through the focal point (F) on the other side of the lens.This behavior is due to the lens's shape, which causes the light to bend as it passes through. The focal length, the distance from the lens to the focal point, is an important parameter for determining the behavior of a converging lens. In summary, a focal ray from an object, after passing through a converging lens, proceeds in the direction of the focal point F.

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Answer:

it's A

Explanation:

We can use Coulomb's law:

Let:

So:

Therefore, we need to decrease the distance by a factor of 9.

Answer:

i think its a lake

Explanation:

Answer: What do you call a large body of water surrounded by land?

A lake is a large body of water surrounded by land on all sides.

Explanation:

A rope is attached to a hook in the ceiling and is hanging straight down. The rope has a mass m, and nothing is attached to the free end of the rope. As a transverse wave travels down the rope from the top, the speed of the wave does not change as the tension and linear density do not change.

What is a transverse wave?

Transverse wave is a wave that oscillates perpendicular to the direction of propagation. In physics, a transverse wave is a wave whose oscillations are perpendicular to the direction of wave propagation. This type of wave is also called a transverse wave. For example, when a rope is shaken up and down, a transverse wave is produced.

What is the speed of the wave?

The velocity of a wave is a function of the medium through which it is traveling. The speed of a wave does not depend on its amplitude. The speed of a transverse wave is proportional to the square root of the tension in the rope divided by the rope's mass per unit length (the linear density).

Therefore, as a transverse wave travels down the rope from the top, the speed of the wave does not change since the tension and linear density do not change.

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A train has an initial velocity of 44meter per second and an acceleration of 4meter per second.The final velocity after 10 seconds is 84m/s.

As we know,

Acceleration= Final velocity-Initial velocity /time.

where acceleartion = a=4m/s².

Initial velocity= u= 44m/s

let final velocity be v

Time =t = 10seconds.

Therefore, the equation is:

a=v-u/t

Substituting the values in the given equation, we get:

4=v-44/10

Now cross multiplying,

4×10 = v-44

40=v-44

40+44=v

v=84m/s

Therefore, the final velocity after 10 seconds is 84m/s.

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