What are three ways to remember the difference between solar and lunar eclipses?.

Answer:

Cold temps. . .

Explanation:

Hope it helps!

(a) The resistive force exerted by the target on the arrow is 2500 N.

(b) The arrow takes 0.04 seconds to come to rest.

The initial kinetic energy of the arrow is given by,

KE = 0.5 * m * v^2 = 0.5 * 0.03 kg * (100 m/s)^2 = 150 J

The work done by the resistive force of the target is equal to the change in kinetic energy of the arrow,

W = ΔKE = KE_f - KE_i = -150 J

Since the arrow is brought to a stop, the work done by the resistive force is negative. The distance over which the force acts is 0.06 m (6 cm), so the resistive force is given by.

W = F * d * cos(180°) = -F * 0.06 m

F = -W / (d * cos(180°)) = 150 J / (0.06 m * -1) = 2500 N

The arrow comes to rest when its final velocity is zero. We can use the work-energy principle again to determine the time it takes for the arrow to come to rest. The work done by the resistive force is given by,

W = F * d * cos(0°) = F * 0.06 m

Since the work done is equal to the change in kinetic energy,

W = ΔKE = -0.5 * m * v_f^2

Solving for the final velocity,

v_f = sqrt(2 * W / m) = sqrt(2 * F * d / m) = sqrt(2 * 2500 N * 0.06 m / 0.03 kg) = 200 m/s

The time it takes for the arrow to come to rest is given by,

t = (v_f - v_i) / a = (0 - 100 m/s) / (-F / m) = 0.04 s

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constant non zero acceleration

Answer:

0.6 resistance

Answer:

what to do with that, I can't answer it

This statement suggests that the ice undergoes a phase change from solid to liquid, indicating heat transfer.

All of the ice will melt, and the final temperature of the mixture will be 10°C.

If the surroundings were at a lower temperature than the ice, heat would flow from the ice to the surroundings, causing the ice to freeze instead of melt.

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Answer:

Water set free by magma began to cool down the Earth's atmosphere, until it could stay on the surface as a liquid. ... The sun, which drives the water cycle, heats water in the oceans. Some of it evaporates as vapor into the air. Ice and snow can sublimate directly into water vapor.

To determine which state is more critical to yielding based on different yielding criteria, we can calculate the relevant stress quantities for each state and compare them.

Given the stress states at two different points in a body:

State 1:

State 2:

a. Octahedral Normal Stress (σ_oct):

The octahedral normal stress is given by the equation σ_oct = (σ₁ + σ₂ + σ₃) / 3.

b. Octahedral Shear Stress (τ_oct):

The octahedral shear stress is given by the equation τ_oct = sqrt((τ₁₂² + τ₂₃² + τ₁₃²) / 3).

c. Maximum Shear Stress (τ_max):

The maximum shear stress is given by the equation τ_max = (σ₁ - σ₃) / 2.

Comparing the results for each criterion:

Based on the given criteria, State 1 is more critical to yielding for octahedral normal stress (σ_oct) and maximum shear stress (τ_max), while State 2 is more critical for octahedral shear stress (τ_oct).

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Wendy riding her bike in a circle in the parking lot is a change in direction, but her speed is constant, so her velocity is not changing. Amber sitting on a park bench and Jessica walking her dog along Chestnut Avenue are both stationary, so there is no change in velocity.

What is Velocity?

It is defined as the change in position of an object over a unit of time, usually measured in meters per second (m/s) or kilometers per hour (km/h), in a specific direction.

In physics, velocity is distinguished from speed, which is the magnitude of an object's velocity but without regard to its direction. Velocity is a more precise term than speed because it includes both magnitude and direction. For example, a car traveling at 60 km/h east has a different velocity than a car traveling at 60 km/h west.

Velocity is a fundamental concept in many areas of physics, including mechanics, thermodynamics, and electromagnetism. It is used to describe the motion of objects ranging from subatomic particles to celestial bodies in the universe.

The only option that shows a change in velocity is Ken driving on Interstate 4 at 65 mph. This is because velocity is a vector quantity that includes both speed and direction. As Ken is driving, he is changing his direction or speed, or both, which means his velocity is changing.

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Answer:

there is no drag in a vacuum (why is father in a vaccum)

Explanation:

there is nothing to hit and slow the object other than gravity like dust or air

To prove that rock layers in one area match rock layers found in another area, geologists use the principles of stratigraphy, including fossil, lithologic, and chemical correlation techniques.

One way to prove that rock layers in one area match rock layers found in another area is by using the principle of stratigraphy, which is the study of rock layers (strata) and their relationships. Geologists can use several techniques to correlate rock layers between different locations, including:

Fossil correlation: If a particular fossil is found in two different rock layers at different locations, it is a good indicator that the layers are of the same age. This is because certain fossils only existed during specific time periods, and so if the same fossil is found in two different rock layers, it can be inferred that those layers were deposited during the same time period.

Lithologic correlation: Rocks can have unique characteristics that allow geologists to match them to other rocks of the same type. For example, sandstone can have unique grain sizes or shapes that can help identify it as coming from a specific location.

Chemical correlation: Some rocks have unique chemical compositions that can be used to match them to other rocks of the same type. For example, volcanic rocks can have unique isotopic signatures that can help identify them as coming from a specific volcano.

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Following the image of the ball that have been shown;

1. Potential energy

2. Kinetic energy

3. Kinetic energy

4. Potential energy

5. Kinetic energy

6. Kinetic energy

7. Kinetic energy

Due to its position or elevation, an object has potential energy while it is at rest or is elevated above the ground. Depending on the circumstances, this potential energy may either be elastic or gravitational.

Kinetic energy, or the energy connected to motion, is present when an item is in motion. An object's kinetic energy is determined by its mass and velocity .

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Answer:

1: Potential and kinetic

2: Potential and kinetic

3: Potential and kinetic

4: potential

5: Potential and kinetic

6: Potential and kinetic

7: NEITHER

Explanation:

4 is potential because its the highest point

7 is neither because the question states "the image shows the path of a ball from the time it's thrown to the time it lands on the ground" so... 7 is when the ball has landed on the ground. therefore it has neither potential nor kinetic because it is resting.

The coefficients of static and kinetic friction between crate and floor are

0.25 and 0.176 respectively.

When a body is at rest and if a force is applied to move it, then it would require the force which is equal to the static friction force, if

fs is the static frictional force and the us is the static friction coefficient and Fn is the normal force

\(f_{s}\) = us*Fn

Fn = mg

putting the appropriate values, we get

=  71/(29*9.8) = 71/284.2

= 0.2498 = 0.25

Now, similarly when body is in motion, kinetic frictional force is applied, so we can write

\(f_{k}\) = uk*Fn

so putting the appropriate values, we get

= 50/mg = 50/284.2 = 0.1759

= 0.176

Hence the value of coefficient of static friction is 0.25 and the value of coefficient of kinetic friction is 0.176.

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Answer:

I'm not 100% sure but I think its Cell membrane

Explanation:

please, correct me if i'm wrong.

The amplitude of the air vibrations caused by a sound wave with a frequency of 249 Hz and an intensity of 7.7e-06 watts/m^2 is approximately 6.23 micrometers.

The relationship between frequency, intensity, and amplitude of a sound wave can be determined using the formula for sound intensity in air,

which is given by \(I = (1/2)\rho v \omega ^2A^2,\)

where I is the sound intensity, ρ is the density of the medium (air), v is the velocity of sound in air, ω is the angular frequency (2πf), and A is the amplitude of the sound wave.

In this case, we are given the frequency (f) as 249 Hz and the intensity (I) as 7.7e-06 watts/m^2. The velocity of sound in air (v) is approximately 343 m/s.

By rearranging the formula, we can solve for the amplitude (A) as follows:

\(A^2 = (2I) / (\rho v\omega ^2)\)

First, we need to calculate the angular frequency (ω) using the given frequency (f).

ω = 2πf = 2π(249 Hz).

Next, we substitute the values into the formula and calculate the amplitude:

\(A^2 = (2 \times 7.7 e-06 ) / (1.225 \times 343 \times (2\pi (249 ))^2)\)

\(A^2 = 1.66e-09\)

Taking the square root of both sides, we find:

A ≈ 4.07e-05 meters

Since the amplitude is given in meters, we convert it to micrometers by multiplying by 10^6:

\(A =4.07e-05 meters \times 10^6 = 40.7 micrometers\)

Therefore, the amplitude of the air vibrations caused by this sound wave is approximately 40.7 micrometers or 6.23 micrometers (rounded to two decimal places).

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1) average power delivered to the circuit is 4.11 Watts. 2) the maximum power delivered to the circuit is 16.4 watts

To find the average power delivered to the circuit, we can use the formula Ohm's Law:
P_avg = V² / R
where P_avg is the average power, V is the voltage, and R is the resistance.
Substituting the given values, we get:
P_avg = (121²) / 3.53k
P_avg = 4.11 watts
Therefore, the average power delivered to the circuit is 4.11 watts.
To find the maximum power delivered to the circuit, we can use the formula:
P_max = (V²) / (4R)
where P_max is the maximum power.
Substituting the given values, we get:
P_max = (121²) / (4 x 3.53k)
P_max = 16.4 watts
Therefore, the maximum power delivered to the circuit is 16.4 watts.

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The behavior of a wildfire is typically described by b) intensity and spread.

Wildfire behavior refers to the way the fire responds to the various factors that influence its spread and movement. The behavior of a wildfire is typically described by two main characteristics, which are intensity and spread. Intensity refers to the heat output of the fire and its potential for ignition and combustion. Spread, on the other hand, is the rate at which the fire is moving and how far it has spread. The intensity of a wildfire is influenced by several factors, including the type of fuel, weather conditions, and topography.

High-intensity wildfires tend to occur in areas with abundant and dry fuel, high temperatures, low humidity, and high winds, they can be dangerous and difficult to control, and they often result in significant damage to the environment and human communities. Spread is influenced by the same factors as intensity, as well as the presence of firebreaks, the availability of resources, and the tactics used by firefighting personnel. The speed and direction of the fire can vary greatly depending on the surrounding conditions, and it is important to monitor and assess these factors in order to manage the fire effectively. So therefore the behavior of a wildfire is typically described by b) intensity and spread.

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The correct statement comparing other regions of the electromagnetic spectrum to visible light is The radio region of the electromagnetic spectrum has longer wavelengths and lower frequencies. The correct option to this question is D.

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No, its fake the instant of inertia of the machine decreases and the angular pace will increase.

A merry-go-spherical spins freely while janice actions fast to the middle alongside a radius of the merry-go-spherical. Moment of inertia is a amount withinside the rotational movement which performs a position analogous to position performed with the aid of using mass withinside the linear movement. Hence, it's also referred to as angular mass or the rotational momentum.

Janice decreases her contribution to the instant of inertia of the machine with the aid of using transferring towards the rotation axis. This decreases the whole second of inertia of the machine. The angular momentum L of the machine does now no longer extrade seeing that no outside torque is applied. The angular pace ω will increase sinceω = L/I.

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Answer:

A dimension is a measure of a physical variable.

Unit is a way to assign a number or measurement to that dimension.

In dimensional analysis, a dimensionless quantity is a quantity to which no physical dimension is assigned, also known as a bare, pure, or scalar quantity or a quantity of dimension one, with a corresponding unit of measurement is the SI of the unit one, which is not explicity shown.

A fuel-filled rocket is at rest. It burns its fuel and expels hot gas. The gas has a momentum of 1,500 kg m/s backward. So, The momentum of the rocket is -1500 kg m/s.

According to the law of conservation of momentum, in a closed system, the total momentum before and after a process remains constant.

A fuel-filled rocket that is initially at rest expels hot gas as it burns its fuel. The gas has a momentum of 1500 kg m/s backward.

We are required to determine the momentum of the rocket.

Consider the fuel-filled rocket as a system.

We have: Momentum before the burn = 0 kg m/s (since the rocket was at rest initially)Momentum after the burn = momentum of the expelled gas

We can therefore say that the initial momentum of the system was zero (0), and after the burn, the total momentum of the system remains the same as the momentum of the expelled gas.

Therefore: Momentum of rocket = - momentum of expelled gas

The negative sign signifies that the rocket's momentum is in the opposite direction of the expelled gas.

Hence, the momentum of the rocket is -1500 kg m/s.

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During photosynthesis, the hydrogen atoms come from water molecules that are split apart by light energy in the process called photolysis. The oxygen atoms, on the other hand, come from the same water molecules as the hydrogen atoms. They are released into the atmosphere as a by-product of photosynthesis. So, both the hydrogen and oxygen atoms that become part of the glucose molecule come from water molecules.

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Kepler's 2nd law states that a line connecting the planets will sweeps equal areas of space in equal time intervals.

The imaginary line joining a planet and the Sun sweeps equal areas of space in equal time intervals as the planet orbits.

Basically ,that the planets do not move with the constant speed along their orbits.

Rather, their speed varies so that the line joining the centers of the Sun and planets sweeps out equal areas of space in equal time.

The point of nearest approach of the planet to the Sun is termed as the perihelion and the point of greatest separation is aphelion.

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Answer:

The initial momentum of the system is 2.6 kg·m/s to the nearest tenth

Explanation:

The given information are;

The mass of the first hockey puck, m₁ = 0.17 kg

The speed of the first hockey puck, v₁ = 15 m/s

The final speed of the first hockey puck, v₃ = 0 m/s (The first hockey puck comes to rest)

The mass of the second hockey puck, m₂ = 0.11 kg

The initial speed of the second hockey puck, v₂

Whereby the second hockey puck was initially at rest, we have v₂ = 0;

The initial momentum of the system = m₁v₁ + m₂v₂ = 0.17 × 15 + 0.11 × 0 = 2.55 kg·m/s

∴ The initial momentum of the system = 2.6 kg·m/s to the nearest tenth.

Answer:

No

Explanation:

The momentum of an object is directly proportional to its mass and velocity. Therefore, the momentum of the larger truck can be calculated as follows:

Momentum of larger truck = (2 x mass of smaller truck) x (1/2 x velocity of smaller truck)

Momentum of larger truck = (2 x m) x (0.5 x 20)

Momentum of larger truck = m x 20

This shows that the momentum of the larger truck is equal to the momentum of the smaller truck, as the increased mass is balanced by the decreased velocity.

In other words, the momentum of an object depends on both its mass and velocity, and changes in one factor can be compensated by changes in the other factor to maintain the same momentum.

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The law of reflection states that when light strikes a flat surface and is reflected, you can draw a line perpendicular to the surface so that the angle of incidence (light moving toward the surface) and the angle of reflection (light reflected away from the surface) will be equal.

If the angle of incidence O1, is 22 degrees, what is the angle of reflection is also 22 degree.

When two distinct media come together at an interface, a wavefront might reverse direction so that it returns to the first medium, which is known as reflection. The reflection of light, sound, and water waves are typical examples. According to the law of reflection, the angle at which the wave impinge on the surface matches the angle at which it is reflected for specular reflection (such as at a mirror).

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The elevator does 24,000 Joules of work in lifting a 600 N person over a distance of 40 meters.

To calculate the work done by an elevator in lifting a person, we can use the formula:

Work = Force × Distance × cos(θ)

Where:

Force = 600 N (the weight of the person)

Distance = 40 m (the vertical distance the person is lifted)

θ = 0 degrees (cosine of 0 is 1, indicating the force and distance are in the same direction)

Plugging in the values:

Work = 600 N × 40 m × cos(0°)

= 600 N × 40 m × 1

= 24,000 N·m

= 24,000 J (Joules)

Therefore, the elevator does 24,000 Joules of work in lifting a 600 N person over a distance of 40 meters.

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The clip of a pen requires elasticity, strength, and durability, while a wire coat hanger needs strength, flexibility, and corrosion resistance for optimal performance.


a) The clip of a pen should have elasticity, allowing it to grip onto various materials without breaking or deforming. Strength ensures that the clip can withstand the forces applied when attaching or removing it from a surface, and durability ensures it can withstand long-term use without breaking or wearing out.
b) A wire coat hanger should have strength to support the weight of clothes without bending or breaking. Flexibility allows the hanger to bend and adapt to different shapes and sizes of clothing without losing its structural integrity. Corrosion resistance ensures the hanger doesn't rust or deteriorate over time when exposed to moisture.

Summary:
In summary, the clip of a pen requires elasticity, strength, and durability, while a wire coat hanger needs strength, flexibility, and corrosion resistance for optimal performance.

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