anyways chile , what y’all doing virtual or school ?

Answer:

It is recommended that you exercise within 55 to 85 percent of your maximum heart rate for at least 20 to 30 minutes to get the best results from aerobic exercise. The MHR (roughly calculated as 220 minus your age) is the upper limit of what your cardiovascular system can handle during physical activity.

(I think) ¯\_(ツ)_/¯

Answer:

circuit b will have the higher current than circuit a

Answer:

I think it's 18 newtons.

Explanation:

The total amount of liquid will still be 100 milliliters.

Milliliters (mL) is a unit of volume measurement that is equal to the volume of a cube that is 1 cm on each side. It is commonly used to measure liquids, such as milk, juice, or medicine. Milliliters can also be used to measure dry ingredients, such as flour or sugar. One milliliter is equal to 0.001 liters, or about 0.034 fluid ounces.

For 100 milliliters of juice, you would need 100 milliliters of fruit juice. In other words, the amount of fruit juice required to make 100 milliliters of juice is the same as the amount of juice you are starting with. This is because when you mix fruit juice with water, the total amount of liquid remains the same. So if you start with 100 milliliters of juice and then add 100 milliliters of water, the total amount of liquid will still be 100 milliliters.

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Answer:

c

Explanation:

I think but if I'm wrong I'm sorry

Answer:

i think its float

Explanation:

Answer:

In general, the concept of output work being less than input work does not align with the laws of physics, specifically the principle of conservation of energy. According to this principle, energy cannot be created or destroyed, but it can be transformed from one form to another. Therefore, the total amount of energy in a closed system remains constant.

When considering work, which is the transfer of energy through the application of force over a distance, the input work and output work should theoretically be equal if no energy is lost to other forms, such as heat or friction. However, in real-world scenarios, various factors can result in a decrease in output work compared to input work. Some possible reasons for this disparity include:

Inefficiencies: Real systems are not perfectly efficient, and energy losses can occur due to factors like friction, heat dissipation, electrical resistance, or mechanical limitations. These losses reduce the amount of useful work obtained from the input energy.

Energy conversion: If the input work is in one form of energy (such as electrical or chemical), and the output work is in a different form (such as mechanical), energy losses can occur during the conversion process. The efficiency of the conversion process determines the amount of output work obtained.

External forces: External factors, such as resistance or opposing forces, can require additional work to overcome, resulting in a decrease in net output work compared to the input work.

It's important to note that while output work can be less than input work in certain situations due to these factors, the total amount of energy remains conserved. Energy that is not converted into useful work is typically dissipated as waste heat or other forms of energy loss.

Answer:

The output work is always less than the input work because of friction.

Explanation:

Friction is a force that opposes the relative motion of two surfaces in contact. When a machine is used, frictional forces are created between the moving parts of the machine and the surfaces they rub against.

These frictional forces require some of the input work to be used to overcome them, which reduces the amount of work that is available to do the desired task.

mounted horsemen who pledged to defend their lords’ lands in exchange for fiefs

mounted horsemen who pledged to defend their lords’ lands in exchange for fiefs

mounted horsemen who pledged to defend their lords’ lands in exchange for fiefs

mounted horsemen who pledged to defend their lords’ lands in exchange for fiefs

mounted horsemen who pledged to defend their lords’ lands in exchange for fiefs

mounted horsemen who pledged to defend their lords’ lands in exchange for fiefs

mounted horsemen who pledged to defend their lords’ lands in exchange for fiefs

mounted horsemen who pledged to defend their lords’ lands in exchange for fiefs

mounted horsemen who pledged to defend their lords’ lands in exchange for fiefs

mounted horsemen who pledged to defend their lords’ lands in exchange for fiefs

Answer:

A. How long will it take for the ball to reach the top of its path

The minimum and maximum braking distances needed to ensure that all vehicles traveling at the posted speed limit can stop before reaching the intersection are as follows:

- For small cars: Minimum ≈ 1773.028 m, Maximum ≈ 1568.850 m

- For large trucks: Minimum ≈ 3285.760 m, Maximum ≈ 2409.595 m

To calculate the minimum and maximum braking distances, we can use the equations of motion for a decelerating vehicle.

The equation for the braking distance of a vehicle is given by:

d = (v^2) / (2 * μ * g)

where d is the braking distance, v is the initial velocity of the vehicle, μ is the coefficient of friction between the tires and the road, and g is the acceleration due to gravity.

Let's calculate the minimum and maximum braking distances separately for small cars and large trucks.

For small cars with a mass of 563 kg:

- Minimum braking distance:

  v = 8989 km/h = (8989 * 1000) / 3600 m/s = 2496.944 m/s

  μ_min = 0.536

  d_min = (v^2) / (2 * μ_min * g) = (2496.944^2) / (2 * 0.536 * 9.8) ≈ 1773.028 m

  Maximum braking distance:

  μ_max = 0.599

  \(d_max = (v^2) / (2 * μ_max * g) = (2496.944^2) / (2 * 0.599 * 9.8) ≈ 1568.850 m\)

For large trucks with a mass of 3951395 kg:

- Minimum braking distance:

  v = 8989 km/h = 2496.944 m/s (same as for small cars)

  μ_min = 0.350

 \(d_min = (v^2) / (2 * μ_min * g) = (2496.944^2) / (2 * 0.350 * 9.8) ≈ 3285.760 m\)

  Maximum braking distance:

  μ_max = 0.480

 \(d_max = (v^2) / (2 * μ_max * g) = (2496.944^2) / (2 * 0.480 * 9.8) ≈ 2409.595 m\)

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It takes 2 seconds for the charge to pass a point in the wire. The result is obtained by using the formula for an electric current equation.

Electric current is a flow of charged particles per unit of time. It can be expressed as

I = Q/t

Where

A light bulb has

Find the time taken!

We use the formula above to find t.

I = Q/t

0.835 = 1.67/t

t = 1.67/0.835

t = 2 s

Hence, the time needed to for the charge to pass a point in the wire is 2 seconds.

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Explanation:

0.75

According to the formula, P=IV

150 = I×200

1. If the plug is moved from one position to another, the frequency of the standing wave remains constant.

2. If the plug is moved to a position where the distance between nodes or antinodes decreases, the wavelength of the standing wave will decrease.

3. The wave speed of the standing wave will remain constant regardless of the position of the plug.

As the plug is moved from one position to another in a system where a standing wave is formed, several changes occur in the standing wave frequency, wavelength, and wave speed:

1. Standing wave frequency: The frequency of a standing wave is determined by the vibration frequency of the source that creates the wave. Therefore, if the plug is moved from one position to another, the frequency of the standing wave remains constant as long as the source frequency remains the same. The movement of the plug does not directly affect the frequency of the standing wave.

2. Standing wave wavelength: The wavelength of a standing wave is determined by the distance between two consecutive nodes or antinodes. When the plug is moved, the position of nodes and antinodes may change, affecting the wavelength of the standing wave. If the plug is moved to a position where the distance between nodes or antinodes increases, the wavelength of the standing wave will also increase. Conversely, if the plug is moved to a position where the distance between nodes or antinodes decreases, the wavelength of the standing wave will decrease.

3. Wave speed: In a medium, the wave speed is determined by the properties of the medium, such as its density and elasticity. The movement of the plug does not directly change the properties of the medium, so it does not affect the wave speed. As long as the medium remains the same, the wave speed of the standing wave will remain constant regardless of the position of the plug.

It's important to note that the specific changes in the standing wave frequency, wavelength, and wave speed will depend on the details of the system and the nature of the wave being generated.

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Answer: below

Explanation:

binge eating then purging. Often known as bulimia. It's an eating disorder. If you starve yourself you have anorexia. If its an idea you are paranoid. Or you are very depressed and you want to get rid of your emotions. It could be called starving yourself too. But you may be looking for the word Orthorexia

Within the boundaries of the constellations Coma and Virgo, numerous galaxies can be found. In fact, the Virgo Cluster of galaxies is one of the most prominent galaxy clusters in the nearby universe and contains over 2,000 galaxies.

The Coma Cluster of galaxies is located in the constellation Coma Berenices and is another rich cluster of galaxies that is also studied by astronomers. It contains more than 1,000 galaxies and is one of the most massive structures in the universe.

In addition to these large clusters of galaxies, there are also many individual galaxies within the boundaries of Coma and Virgo. For example, the Sombrero Galaxy (M104) is a prominent galaxy in the constellation Virgo, while the Coma Galaxy Cluster contains many individual galaxies, including NGC 4889, which is one of the largest galaxies known.

Additionally, the Coma Cluster is another notable cluster of galaxies located in this region of the sky. Both of these clusters are important objects of study for astronomers as they offer insights into the formation and evolution of galaxies and galaxy clusters.

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The surface tension of the liquid is 24.1 g/m.

To calculate the surface tension of the liquid, we can use the formula:

surface tension = (extra force required) / (length of the film)

extra force required = 3.03 g

internal radius = 3 cm = 0.03 m

external radius = 3.2 cm = 0.032 m

The length of the film can be calculated as the circumference of the external ring minus the circumference of the internal ring:

length of the film = (2 * pi * external radius) - (2 * pi * internal radius)

= (2 * pi * 0.032 m) - (2 * pi * 0.03 m)

= 0.1257 m

So, the surface tension can be calculated as:

surface tension = (3.03 g) / (0.1257 m)

= 24.1 g/m

The surface tension of the liquid is 24.1 g/m.

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Answer:

The force of the (attraction) between the poles B and C is (maximum) and the force of a (attraction) between the poles A and D is (minimum).

Explanation:

From the given information, in this process the energy of the system stays the same, i.e., option c is the correct answer.

According to the law of conservation of energy, energy can neither be created nor destroyed, only transferred or converted from one form to another. In this case, the metal sphere loses heat energy as it cools down, and the liquid gains an equal amount of heat energy as it warms up. Therefore, the total amount of energy in the system remains constant throughout the process, and the energy of the system stays the same.

Since the container is insulated, there is no heat exchange with the surroundings, and no energy is transferred in or out of the system. Therefore, the energy of the system remains constant, and option c is the correct answer.

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The toaster would use 9.34 kilowatt-hours of energy in 3.5 hours.

First, we need to calculate the power (in watts) that the toaster uses:

Power = Voltage x Current = 120V x 6.2A = 744W

Next, we'll convert the time from hours to seconds:

Time = 3.5 hours x 3600 seconds/hour = 12600 seconds

Finally, we'll multiply the power by the time to find the energy used:

Energy = Power x Time = 744W x 12600 seconds = 9,336,400 J

Now we can convert the energy from joules to kilowatt-hours:

Energy (kWh) = Energy (J) / (1000 J/kWh) = 9,336,400 J / (1000 J/kWh) = 9.34 kWh

So the toaster would use 9.34 kilowatt-hours of energy in 3.5 hours.

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The answers are (a) velocity, v=2.8m/s , mass, m=0.0038kg and x=0.055m.

(b) v=2.7m/s.

Any object or system that has stored energy as a result of its position or component arrangement is said to have potential energy. Nevertheless, it is unaffected by external factors like air pressure or altitude. On the other hand, kinetic energy is the force that propels a moving object or group of particles.

(a) By equating the compressed spring's potential energy to the cork's kinetic energy at release, we have

The formula is :

k = \(\frac{1}{2} mv^2\)

v = \(\sqrt{\frac{2k}{m} }\)

And potential energy of spring = \(\frac{1}{2}mx^2\)

On equating these two equations we get ;

v = x\(\sqrt{\frac{k}{m}\)

After substituting the value of x = 5.5 cm and m = 3.8g we would get

v=2.8m/s m=0.0038kg and x=0.055m.

(b) In the novel scenario, there is some potential energy present just before release. Energy conservation changes when d=0.015m.

Similarly solving the question we get :

v = 2.7 m/s

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a. John Glenn would have weighed 160 N if his Mercury spacecraft had (hypothetically) remained at twice the distance from the center of Earth

b. An astronaut is never truly weightless because the earth still exerts a gravitational pull on the astronaut since the spaceships are not at an infinite distance from the earth who in space is actually experiencing free fall due to gravity.

From Newton's law of Universal gravitation:

From the question, the distance between the spacecraft and the center of the earth is twice the distance on the earth's surface.

All other values remained constant, therefore, only the change in distance will affect the force.

Weight or force of gravity on John on the earth's surface is given as:

The equation for calculating the new force or weight, Fₓ will simply be;

since d = 2

Fₓ = 640 / 2²

Fₓ = 160 N

Therefore, John Glenn would have weighed 160 N if his Mercury spacecraft had (hypothetically) remained at twice the distance from the center of Earth.

b. The spacecraft carrying astronauts orbit the earth at very high speeds. So astronauts even though experiencing free fall due to the gravitational force of the earth, never really fall onto the  earth's surface.  

An astronaut is never truly weightless because the earth still exerts a gravitational pull on the astronaut since the spaceships are not at an infinite distance from the earth who in space are actually experiencing free fall due to gravity.

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Answer:

0.252 m/s

Explanation:

Applying the law of conservation of momentum,

Total momentum before collision = Total momentum after collision

Note: From the question, The collision between the car and the train is an inelastic collision and as such, both move with a common velocity after collision.

mu+m'u' = V(m+m')................... Equation 1

Where m = mass of the train, u' = initial velocity of the train, m' = mass of the car, u' = initial velocity of the car, V = common velocity after collision.

make V the subject of the equation

V = (mu+m'u')/(m+m')............... Equation 2

Given: m = 270000 kg, u = 0.325 m/s, m' = 52500 kg, u' = -0.12 m/s

Substitute these values into equation 2

V = [(270000×0.325)+{52500(-0.12)}]/(270000+52500)

V = 81450/322500

V = 0.252 m/s

When the rock is moved from the boat to the water, the water level in the tank should rise. This phenomenon is known as Archimedes' principle.

When an object is submerged in a fluid, such as water, it displaces an amount of water equal to its own volume. This phenomenon is known as Archimedes' principle. According to this principle, the upward buoyant force acting on an object submerged in a fluid is equal to the weight of the fluid displaced by the object.

In this case, when the rock is moved from the boat to the water, it displaces a volume of water equal to its own volume. As a result, the water level in the tank will rise to accommodate the displaced water.

To calculate the exact change in water level, we would need to know the volume of the rock and the initial water level in the tank. Without this information, it is not possible to provide a numerical calculation for the change in water level.

When the rock is moved from the boat to the water, the water level in the tank will rise. This is because the rock displaces an amount of water equal to its own volume, in accordance with Archimedes' principle.

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Answer:

in a generator mechanical energy is a device that converts a form of energy into electricty

The energy conversion provided by the generators is: mechanical to electrical energy. Hence, option (A) is correct.

An electric generator is a device that generates electric energy, which can either be immediately delivered to houses, businesses, and other structures or stored in batteries. Electromagnetic induction is the basis for how electric generators operate.

A horseshoe-shaped magnet's poles are quickly rotated around a conductor coil, which is a copper coil that has been tightly wound onto a metal core. An armature is made up of a conductor coil and a core. The armature is rotated by a mechanical energy source, such as a motor, by means of a shaft connection.

The magnetic field that exists between the magnet's two poles is broken off when the coil turns. The conductor's electrons will interact with the magnetic field, causing an electric current to flow through it.

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Answer:

the difference is when object is in rest its potential when object is in motion its kenitic energy

The detail how the kinetic is transformed into potential energy in the Newton's Cradle example is discussed in the answer.

The Newton's Cradle is an apparatus that uses spheres in motion to show how momentum and energy are conserved. One of the stationary spheres at the end is lifted and released, striking them and sending a force through them that forces the final sphere higher. In order to recreate the effect in the other way, the final sphere swings back and collides with the virtually stationary spheres.

In  Newton's Cradle, one or many balls have to rise at the staring. Tis provides potential energy. When the balls fall, this potential energy transfers into kinetic energy. When balls of  Newton's Cradle collides, kinetic energy transfers from one ball to another, that's why they moves simultaneously.

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WACC (Weighted Average Cost of Capital) is a calculation used to assess a company's cost of capital. It is computed by multiplying each source of capital (equity, debt, and preferred stock) by its relevant weight and then summing these up.

In this question, Ace Batteries is utilizing the CAPM (Capital Asset Pricing Model) to determine the cost of equity capital.Ace Batteries' WACC can be reduced if the company's beta decreases. The beta of a company is a measure of its market risk or volatility, and it is a component of the CAPM formula

As a result, a lower beta lowers the cost of equity capital, lowering the company's WACC. Consequently, option c: A decrease in the company's beta, will REDUCE Ace Batteries' WACC (weighted average cost of capital).

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Answer:

0 m/s²

Explanation:

Acceleration is defined as the rate of change of velocity:

\(acceleration = \frac{change \space\ in \space\ velocity}{time taken}\) .

As the velocity is constant, change in velocity = 0.

∴ acceleration = 0/ 10

                        = 0 m/s²

When electricity moves through a metal wire, the wire is option B. A conductor.

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Answer:

24 m to the right/ to the east

Most substances expands when temperature increases.

At low temperatures, most substances are solids. When the temperature rises, it becomes a liquid. At higher temperatures it becomes gaseous. The process by which a solid becomes a liquid is called melting (an old term you sometimes come across is fusion).

Thermal energy is added to a material during heating. As a result, its particles accelerate and its temperature rises. The loss of thermal energy that occurs during cooling results in a decrease in temperature and slower particle motion in the cooled material. When a substance's temperature rises, its molecules expand because they have more energy and are moving faster and further apart. When a material is heated, the molecules absorb energy. The inter-molecular connections between molecules are first disrupted.

So, most substances expands when temperature increases.

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The complete question is as follows:

What most substances do as temperature increases?