what form permanent magnet
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Answer: Environmental factors are the abiotic factors that interact with and influence the biotic factors. The amount of carbon dioxide, and water clarity affects the sunlight reaching the aquatic organisms.

Answer:

northface thermo

Explanation:

The mechanical energy of the swing is the sum of the potential energy and the kinetic energy which is equal to 225 Joules.

Mechanical energy is the energy which is present either in an object which is in motion or the energy which is stored in objects by their position. Mechanical energy is the main driver of renewable energy. Many different forms of renewable energy rely directly on the mechanical energy to adequately produce enough amount of power or convert energy.

The mechanical energy of the object is the sum total of individual energies which are present in the object. The mechanical energy of an object can be represented as:

M.E. = P.E. + K.E.

M.E. = Mechanical energy,

P.E. = Potential energy,

K.E. = Kinetic energy

Therefore, the mechanical energy of the swing will be:

M.E. = 150J + 75J

M.E. = 225 Joules

Therefore, the mechanical energy of the swing is equal to 225 Joules.

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The potential energy of the roller coaster is 176,400 J (joules).

The potential energy of an object is given by the formula PE = mgh, where PE is the potential energy, m is the mass of the object, g is the acceleration due to gravity, and h is the height or vertical position of the object.

In this case, the roller coaster is at a peak of 20m and has a mass of 900kg. The acceleration due to gravity, g, is approximately 9.8 \(m/s^2\).

Using the formula, we can calculate the potential energy:

PE = mgh

= (900 kg)(9.8 \(m/s^2\))(20 m)

= 176,400 J

Therefore, the potential energy of the roller coaster is 176,400 J (joules).

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1. People have to prepare for natural disasters in order to reduce the risk of injury, death, and property damage caused by the disaster.

Natural disasters are adverse events that occur naturally and are a result of the interaction between the physical environment and human activities. They can include floods, hurricanes, tornadoes, earthquakes, tsunamis, wildfires, landslides, volcanic eruptions, and extreme weather events. Natural disasters can have devastating impacts on communities, including loss of life, damage to property, displacement, and destruction of livelihoods. Governments, organizations, and individuals are increasingly working to reduce the impacts of natural disasters through improved risk management, infrastructure planning, and disaster response and recovery efforts.

2. People have to prepare for natural disasters in order to be able to respond quickly and efficiently in the event of an emergency.

3. People have to prepare for natural disasters in order to plan for the financial impacts of the disaster.

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According to the Keynesian view, manipulating foreign sector spending is not a reliable way to move the U.S. economy toward a more acceptable equilibrium because it does not address the fundamental causes of economic instability.

Keynesian economics focuses on the role of domestic demand in driving economic growth and stability. The government can use fiscal and monetary policy to stimulate aggregate demand and promote full employment. However, changes in foreign sector spending can be unpredictable and beyond the control of domestic policymakers. For instance, an increase in foreign demand for U.S. exports could boost economic growth and employment in the short run, but it may not be sustainable if the foreign demand later decreases. Similarly, a decrease in foreign demand for U.S. exports could have negative short-term effects on the economy, but it may not necessarily lead to a long-term decline. In short, Keynesian economics emphasizes the importance of domestic demand management and stabilizing the economy through government intervention. While changes in foreign sector spending can have some impact on the economy, they are generally seen as unreliable and unpredictable, and therefore not a reliable tool for achieving economic stability in the long run.

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Answer:

For the person you can improve the precision if you use a more accurate tape or ruler, that is, it has a smaller error or if you perform the measurement several times with the same ruler of the same value.

To improve accuracy, you can measure the width in various parts of the table and average so that this value is as close to the true value as possible.

Explanation:

For this exercise we must take the difference between precision and accuracy how much.

A measure is exact if its value is as expected

A measurement is accurate if the dispersion of the measured values ​​is small

For the person you can improve the precision if you use a more accurate tape or ruler, that is, it has a smaller error or if you perform the measurement several times with the same ruler of the same value.

To improve accuracy, you can measure the width in various parts of the table and average so that this value is as close to the true value as possible.

Answer:

;

Explanation:

;

The pressure after the temperature has risen to 40.0 °C, assuming that there are no appreciable leaks or changes in volume is 4.35×10⁵ Pa

From the question given above, the following data were obtained:

The pressure the temperature has risen to 40 °C can be obtained as follow:

P₁V₁ / T₁ = P₂V₂ / T₂

Volume = contant

P₁ / T₁ = P₂ / T₂

4.00×10⁵ / 288 = P₂ / 313

Cross multiply

P₂ × 288 = 4.00×10⁵ × 313

Divide both sides by 288

P₂ = (4.00×10⁵ × 313) / 288

P₂ = 4.35×10⁵ Pa

Thus, the pressure at 40 °C is 4.35×10⁵ Pa

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Responder:

Explicación:

Según la ley de ohmios, el voltaje es directamente proporcional a la corriente.

V∝I

V = kI

k = V / I donde k es la constante de proporcionalidad

V₂ / V₁ = I₂ / I₁ = k

Dado V₁ = 40V, I₁ = 20A, I₂ = 4A y V₂ =?

Sustituyendo los valores dados en la fórmula;

V₂ / V₁ = I₂ / I₁

V₂ / 40 = 4/20

cruzar multiplicar

20V₂ = 40 * 4

V₂ = 160/20

V₂ = 8 voltios

Por lo tanto, cuando pasa una corriente igual a 4 A, el pd será de 8 voltios.

Explanation:

the question it's not complete as I don't know the height as the formula for potential energy is : PE = mgh

(m) - mass acceleration due to gravity

(g) - acceleration due to gravity (9.8 m/s2)

(h) - height

Answer:

a = 5 [m/s²]

Explanation:

We know from Newton's second law that the sum of forces on a body is equal to the product of mass by acceleration.

∑F = m*a

where:

F = total force = 50 [N]

m = mass = 10 [kg]

a = acceleration [m/s²]

Now replacing:

\(a = \frac{F}{m} \\a=50/10\\a = 5 [m/s^{2} ]\)

Answer: A. Balloons can be filled with air.

C. Air has mass.

Explanation:

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Balloons are able to be filled with air and air has mass.

Answer:

−10.1−3.−7VX,2

Explanation:

Answer:

Evaluate (2 - 3)4(4) - 9 ÷ 3.

-7

-2

1

2

Explanation:

answer is 1

Answer:

Explanation: relationship between the object and the observer's frame of reference.

(a) The magnitude and direction of the net force on the crate while it is on the rough surface is 34.7 N in opposite direction.

(b) The net work done on the crate while it is on the rough surface is -22.6 J.

(c) The speed of the crate when it reaches the end is 0.5 m/s.

The magnitude and direction of the net force on the crate while it is on the rough surface is calculated as follows;

F (net) = F - Ff

where;

F (net) = F - μmg

where;

F (net) = 289 N  -   (0.359 x 92 X 9.8)

F (net) = -34.7 N

The negative sign indicates opposite direction to the applied force.

The net work done on the crate while it is on the rough surface is calculated as follows;

W = F(net) x L

where;

W = -34.7 x 0.65

W = -22.6 J

The speed of the crate when it reaches the end is calculated as follows;

acceleration of the crate = F(net) / m

a = -34.7 N / 92 kg

a = -0.377 m/s²

v² = u² + 2aL

v² = ( 0.855)²  +  ( 2 x -0.377 x 0.65)

v² = ( 0.855)²   - ( 2 x 0.377 x 0.65)

v² = 0.24

v = √ 0.24

v = 0.5 m/s

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Answer:

Micrometers provide very accurate measurements

The micrometer is one of the most accurate types of measuring device.

Most micrometers can measure up to 0.001mm or 0.0001 inches.

-------

Ratchet speeder helps to provide reliable measurements

The ratchet speeder/stop mechanism ensures that uniform pressure is applied to the thimble so that measurements are reliable and repeatable.

-------

Explanation:

A thermal conductor, such as water is the type of material that is good at transferring heat. Option B is correct.

Heat conductors are substances that effectively conduct thermal energy.

The kind of substance that is effective in transferring heat is a thermal conductor, such as water.

Metals have excellent heat conductivity. Heat insulators are substances that poorly conduct thermal energy. Thermal insulators include gases like air and materials like plastic and wood.

Water conducts heat 24.17 times more quickly than air. The kind of substance that is effective in transferring heat is a thermal conductor, such as water.

Hence, option B is correct.

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According to the physics professor's acceleration vs. time graph, a change in speed could also mean a change in velocity.

An object's velocity may alter depending on whether it is moving faster, slower, or in a different direction. The moon orbiting the earth and an apple falling to the ground are two instances of acceleration.

The pace at which displacement changes is known as velocity. The rate at which velocity changes is known as acceleration. Because it includes both magnitude and direction, mass and velocity quantity. Since acceleration is merely the rate at which velocity changes, acceleration is likewise a vector quantity.

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Answer:

  3 Ω

Explanation:

I find a calculator with a reciprocal key quite useful for calculating parallel resistance.

  Req = 1/(1/r1 +1/r2 +... +1/rn))

Of course, resistors in series add.

The far right two branches are 10 Ω in parallel with (8+2) Ω = 10 Ω. Of course, the parallel combination of two equal-value resistors is half the value of either of them. Thus the two right branches resolve to 5 Ω, which is then added to 1 Ω to give an effective middle section that is 12 Ω || 4 Ω || 6 Ω.

That combination has an effective resistance of ...

  Req = 1/(1/12 +1/4 +1/6) = 1/(1/12 + 3/12 +2/12)) = 12/6 = 2 . . . ohms

This is effectively in series with the upper left 1 Ω resistor, so the equivalent load on the source is 1+2 = 3 Ω.

Answer:

can someone please answer this i need this for a mastery test aswell

Explanation:

it would be very appreciated

Answer:

3.45 inches = 8.763e-5 kilometers

When they collide, the truck exerts a larger force on the stationary car, while the stationary car exerts an equal and opposite force on the truck, according to Newton's Third Law of Motion.

The front of the truck is intended to crumple in order to reduce the force of impact on both vehicles and their passengers, thereby protecting the passengers' well-being.

According to Newton's Third Law of Motion, when two vehicles collide, each applies a force on the other that is identical in size but opposite in direction.

Because of its greater mass and velocity in this collision between a big truck and a small car, the truck exerts a greater force on the car. The front of the truck, on the other hand, is intended to crumple upon contact, absorbing some of the force and lowering the total impact on both vehicles and their passengers.

Regardless of this design, collisions between big trucks and smaller vehicles can be dangerous, emphasizing the importance of safe driving practices.

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the question is incomplete. the complete question is

Danica observes a collision between two vehicles. She sees a large truck driving down the road. It strikes a small car parked at the side of the road. Complete the passage summarizing the collision.

On colliding, the truck applies a force on the stationary car, and the stationary car applies - A smaller, A greater, An equal- . and opposite force on the truck. The front of the truck is designed to crumple to - Lower the force of impact, Apply maximum force on the stationary car, Accelerate both vehicles passengers - , which protects the well-being of the passengers.

The weight must be 288N placed on the end of the spring when it is 2m from the ground.

If an object is lifted, work is done against gravitational force. The object gains energy.

Given is a spring has a spring constant of 48 N/m. The end of the spring hangs 8 m above the ground. The final height of weight above the ground, h =2m

Using Hooke's law, expressed as

Force, F = k (x₂-x₁).

Put the values, we get

F = 48 (8-2)

F = 288 N

This force applied on the spring is equal to the weight placed on the spring.

Weight W= 288N.

Thus, the weight must be 288N.

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Answer:

Higher Pitched! (b)

Explanation:

The Doppler effect makes it seem high pitched, as the sound waves are mushed together at a higher frequency, while moving away, the sound waves spread out like a lower frequency wave!

Answer:

The reason that the nucleus of most atoms does not fall apart despite the oppositely charged protons exerting a repulsive force on each other is the strong nuclear force.

The strong nuclear force is one of the fundamental forces in nature that acts between protons and neutrons in the atomic nucleus. It is a short-range force that is much stronger than the electromagnetic force (which produces the repulsion between protons).

The strong nuclear force is responsible for holding the nucleus together.

Additionally, the ratio of protons to neutrons in a nucleus also affects its stability. Therefore, if there is an imbalance in this ratio, the repulsive force between the protons can become too strong, causing the nucleus to become unstable and undergo radioactive decay.

Overall, the nucleus remains stable due to the balance between the strong nuclear force and the repulsive force between the protons.

Answer:

I am 15th in my state for 55m hurdles with a time of 10.4 seconds

Explanation:

BAM

Answer: 44 m per minute

Explanation:

We can use the following data to get the values of acceleration and the distance covered at top speed:

Maximum speed is 20 m/s (v_max).

Time (t) = 21 seconds

(d) = 270 m is the total distance travelled.

Find the acceleration (A) first:

Applying the equation v = u + at

where an is the acceleration, t is the elapsed time, u is the beginning velocity, and v is the end velocity.

Given: The bus will begin at rest with an initial velocity of 0 metres per second (u).

The formula can be rearranged as follows:

a = (v - u) / t

a = (20 m/s - 0 m/s) / 21 seconds

0.952 m/s2 a = 20 m/s / 21 sec

Therefore, the acceleration of the bus is approximately 0.952 m/s².

Next, let's find the distance traveled at maximum speed (B):

Since the bus starts from rest, it takes time to accelerate to its maximum speed and then decelerate to stop. The distance traveled at maximum speed can be found by subtracting the distances covered during acceleration and deceleration from the total distance.

Distance during acceleration = (1/2) * a * t^2

Distance during deceleration = (1/2) * a * t^2

Distance traveled at maximum speed = Total distance - (Distance during acceleration + Distance during deceleration)

B = d - (0.5 * a * t^2 + 0.5 * a * t^2)

B = 270 m - (0.5 * 0.952 m/s² * (21 sec)^2 + 0.5 * 0.952 m/s² * (21 sec)^2)

B = 270 m - (0.952 m/s² * (21 sec)^2)

B = 270 m - 220.392 m

B ≈ 49.608 m

Therefore, the distance traveled at maximum speed is approximately 49.608 m

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Answer:

V = (v1 + v2) / 2 = (8 + 6.5) / 2 = 7.25 m/s     average speed

t = 7.2 / 7.25 = .993 sec      time to cross patch

a = (v2 - v1) / t = (6.5 - 8) / .993 = -1.51 m/s^2     or 1.5 m/s^2

The average velocity for the race is 7.25 m/s if and the acceleration is 1.5 m/s², and the time is 0.99 seconds.

It is defined as the rate of change in linear velocity with respect to time. It is also known as linear acceleration.

It is given that:

Coasting due west on your bicycle at 8 m/s, you encounter a sandy patch of road 7.2 m across.

The bicycle slows with constant acceleration.

As we know,

V = (v1 + v2)/2

Here V is the average velocity

v1 = 8 m/s

v2 = 6.5 m/s

V = (v1 + v2)/2 = (8 + 6.5)/2

V = 7.25 m/s    

t = 7.2/7.25

t = 0.993 sec      

a = (v2 - v1)/t = (6.5 - 8)/0.993

a = -1.51 m/s²    

a = 1.5 m/s²

Thus, the average velocity for the race is 7.25 m/s if the acceleration is 1.5 m/s², and the time is 0.99 seconds.

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