Suppose that a grandfather clock has a pendulum with a length of 1.5m. You find that the clock runs fast so that it gains 10 seconds every hour. How much should the pendulum be lengthened to run on time?

Answer:

You need to divide 200 by 23 seconds in order to get your answer.

To calculate the expected annual electric energy output from the residential photovoltaic system, we can use the given information. The average annual solar energy incident on a south-facing.

Tilted surface in Durham is 1,020 kWh/(m^2year). The photovoltaic system has a 23 m^2 area, a solar array efficiency of 16%, and a performance ratio of 0.76.

First, we calculate the total incident solar energy on the system by multiplying the solar energy incident per unit area (1,020 kWh/(m^2year)) by the total area of the solar array (23 m^2). This gives us the total solar energy incident on the system.

Next, we multiply the total incident solar energy by the solar array efficiency of 16% to account for the conversion of solar energy into electric energy.

Finally, we further multiply the result by the performance ratio of 0.76 to consider the overall performance and losses of the system.

By performing these calculations, we find that the expected annual electric energy output from the residential photovoltaic system is [insert calculated value] kWh, with 0 decimal places.

This value represents the estimated amount of electric energy that can be generated by the system over the course of one year.

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Answer:

1.5 jouls for 1 coulomb

Explanation:

energy(U)=charge(q)*potential(V)

so U for 1 coulomb U=1*1.5=1.5 jouls

and for 1 electron U=(1.6*10^(-19))*1.5= 2.4*10^(-19) jouls

Answer:

The basic concept of how a simple motor works is that you put electricity into it at one end and an axle (metal rod) rotates at the other end giving you the power to drive a machine of some kind. The simple motors you see explained in science books are based on a piece of wire bent into a rectangular loop, which is suspended between the poles of a magnet. In order for a motor to run on AC, it requires two winding magnets that don’t touch. They move the motor through a phenomenon known as induction.

I hope this helps! Let me know if I'm wrong!

Explanation:

Answer:

proton and neutron respectively.

Explanation:

Atoms of the same element will always have the same number of proton but will have different numbers of neutron if their mass numbers are different.

Color, hardness, malleability, soluble, electrical conductivity, weight, melting point, & boiling temperature are examples of the physical qualities of matter.

By definitions, the reciprocal is electrical resistivity, or S/m (siemens per meter) as SI units, is the measurement unit for electrical conductivity. The conversion chart between SI units with regular units is displayed in Table 1. The quantity of the SI unit was divided by 100 to determine the worth of the traditional unit.

For conducting electricity, metallic materials such as copper, iron, silver, aluminum, and silver work best. Via the electrodes in some kind of a standardised aqueous solution at a specific temperature, the electrical conductivity of a substance is measured.

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The plane traveled 2125 km north and 1812 km west after 3.40 hours.

To solve this problem, we need to break down the velocity vector into its northerly and westerly components. We can use trigonometry to do this. Let's call the northerly component "v north" and the westerly component "v west". We can find v north by multiplying the velocity (835 km/h) by the sine of the angle (41.5∘) between the velocity vector and the north direction. Similarly, we can find v west by multiplying the velocity by the cosine of the angle.

Using the trigonometric functions, we get:
v north = 835 km/h x sin(41.5∘) = 625 km/h
v west = 835 km/h x cos(41.5∘) = 533 km/h

Now, to find how far north and how far west the plane has traveled after 3.40 hours, we simply need to multiply the components by the time:
Δd north = v north x time = 625 km/h x 3.40 h = 2125 km
Δd west = v west x time = 533 km/h x 3.40 h = 1812 km

So the plane traveled 2125 km north and 1812 km west after 3.40 hours.

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Answer:

a)   τ₁ = 660 N m,  b)  τ’= 686 N m,  c)    F = 623.6 N

Explanation:

a) For this exercise let's use the concepts of torque and rotational balance.

For this we set a reference system at the base and assuming that the counterclockwise rotations are positive

where the force F = 600 N, the distance to the axis is x = 1.1 m, the mass of the system m = 70g and the weight is placed at the point of the center of  gravity x_{cm} = -1.0 m

The torque at the front is

          τ₁ = F x

          τ₁ = 600 1.1

          τ₁ = 660 N m

b) let's write the rotational equilibrium condition

           ∑ τ = 0

           τ'- W x_{cm} = 0

           τ ’= mg x_{cm}

            τ’= 70 9.8 1.0

            τ’= 686 N m

c) the greatest force Matt can apply

           τ’= F x

           F = τ’/ x

           F = 686 / 1.1

           F = 623.6 N

when running a line, in a right-triangle, from the 90° angle perpendicular to its opposite side, we will end up with three similar triangles, one Small, one Medium and a containing Large one.  Check the picture below.

\(\cfrac{x}{11}~~ = ~~\cfrac{4}{x}\implies x^2=44\implies x=\sqrt{44}\implies x=2\sqrt{11}\)

Given:

A ball bouncing eventually comes to stop.

To find:

What kind of a system is this?

Explanation:

An open system is a system where the free exchange of matter and energy with the surroundings takes place.

A closed system is where only the energy of the system is shared with the surrounding. In these kinds of systems, the exchange of matter does not take place.

An isolated system is where neither matter nor energy is exchanged between the system and the surrounding.

When a ball is bouncing, it gradually loses its kinetic energy to the surroundings and eventually comes to stop. But the mass of the ball remains the same. Thus this is a closed system.

Final answer:

The given system is a closed system.

Therefore the correct answer is option B.

Answer:

all living things are made of cells

Explanation:

cells are kinda like matter but only for living thing like when someone says you white blood cell count is low its because they are part of you living body.

The B in BLUE stands for "Best Linear Unbiased Estimator." The Gauss-Markov Theorem states that if assumptions 1-5 are satisfied, then the Ordinary Least Squares (OLS) estimator is the Best Linear Unbiased Estimator.

Let's break down the meaning of each term in the acronym:

1. Best: The OLS estimator is considered the best because it has the smallest variance among all linear unbiased estimators. In other words, it is the most efficient estimator among all unbiased estimators.

2. Linear: The OLS estimator is a linear combination of the dependent variable and the independent variables. It assumes a linear relationship between the variables.

3. Unbiased: The OLS estimator is unbiased, meaning that on average it will provide an estimate that is equal to the true population parameter being estimated. This implies that there is no systematic error in the estimation process.

4. Estimator: The OLS estimator is a statistical technique used to estimate unknown parameters in a linear regression model. It calculates the best-fit line that minimizes the sum of squared residuals.

The Gauss-Markov Theorem is important because it provides conditions under which the OLS estimator is the best among all linear unbiased estimators.

It ensures that if assumptions 1-5 are met, the OLS estimator will have the smallest variance and, be the most efficient estimator.
The Gauss-Markov Theorem states that if assumptions 1-5 are satisfied, the OLS estimator is the Best Linear Unbiased Estimator (BLUE) because it is the most efficient and unbiased estimator among all linear unbiased estimators.

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Answer:

60

Explanation:

(hint: speed = distance/time)

The average speed for this trip will be \(\rm 60 mile\ hr^{-1}\). The ratio of the total distance and time is average velocity.

The total distance traveled by an object divided by the total time taken is the average speed.

The average speed of an object indicates the pace at which it will traverse a distance. The metric unit of speed is the meter per second.

The given data in the problem is;

t is the time taken = 5 hour

d is the distance tyravelled=300 miles

The average velocity is found as;

\(\rm v_{avg} = \frac{d_{total}}{t{total}} \\\\\ \rm v_{avg} = \frac{300}{5} \\\\ \rm v_{avg} = 60 mile\ hr^{-1}\)

Hence the average speed for this trip will be \(\rm 60 mile\ hr^{-1}\)

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Answer:

well im not gonna give the full answer but the hint im going to give is tht u can use a calculator

Explanation:

The main difference between the energy of moving water and the energy of stored water is that the energy of moving water has kinetic energy whereas the energy of water that is stored has potential energy.

Potential energy is defined as the stored energy in any object due to its position while on the other hand, while Kinetic energy is defined as the energy an object has due to its motion. The energy stored in the water molecules which is used for the movement of these molecules is called water potential. Stored water has potential energy but the kinetic energy is present only in the moving molecules of water.

So we can conclude that moving water has kinetic energy while on the other hand, the energy of water that is stored has potential energy.

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Exercise is a vigorous activity that tends to help us to burn calories and loose weight in the process.

Exercise is a vigorous activity that tends to help us to burn calories and loose weight in the process. There is no quick way to loose weight because the calories were added on gradually and must also be lost gradually.

Before and after photos does not show the loss in calories. This can only be determined by measurement.

Before you buy exercise equipment;

An example of an exercise equipment is a stationary bicycle. It works when you sit or stand on it and cycle repeatedly though it doesn't move. I am skeptical about it because it may not help you burn a lot of calories except you use it for long periods of time.

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It takes the ball 3.06 seconds to reach its highest point

The time it takes for a ball to reach its highest point is given by the equation:

t = v / g

where

In this case, the initial velocity is 30.0 m/s and the acceleration due to gravity is \(9.8 m/s^2\). Therefore, the time it takes for the ball to reach its highest point is:

\(t = 30.0 m/s / 9.8 m/s^2 = 3.06 s\)

Therefore, it takes the ball 3.06 seconds to reach its highest point.

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Answer:

To calculate the extension of a rubber band that has a spring constant of 180 N m^-1 and for which the work done in extending it is 0.16 j, you can use the following formula:

extension = work done / spring constant

Plugging in the values given in the question, you can calculate the extension as follows:

extension = 0.16 j / 180 N m^-1

= 0.000889 m

Therefore, the extension of the rubber band is 0.000889 m.

It's important to note that this calculation assumes that the rubber band behaves as an ideal spring, which means that it obeys Hooke's Law (F = kx, where F is the force applied to the spring, k is the spring constant, and x is the extension of the spring). In reality, real-world springs may not behave perfectly according to Hooke's Law, so the calculated extension may not be completely accurate.

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states that the acceleration of an object is dependent upon two variables - the net force acting upon the object and the mass of the object.

Temperature inversion leads to an increase in temperature as altitude increases.

The term temperature inversion refers to a situation in which a layer of warm air lies over a layer of cool air. This is also referred to as thermal inversion. This occurs when the air below to loose heat rapidly.

One of the effects of temperature inversion is reduction in visibility. So, thermal inversion leads to an increase in temperature as altitude increases.

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Answer:

drag and friction effect acceleration

If the ammeter readings are greater or lower than the scale's range, the device is either overloaded or unable to measure the current reliably on the 0.5A scale.

The current being measured is more than the scale's range if the ammeter is calibrated for a 0.5 A scale and reads 2A. Alternatively put, If the ammeter is calibrated for 0.5 A and displays 0.2 A, Similarly, if the ammeter registers 0.002A, the current being measured is 0.002A or less and falls within the range of the scale. A reading of 0.02A on the ammeter indicates that the current being measured is 0.02A or less and falls within the range of the scale. If the ammeter reads 10A, the ammeter is overloaded and the current being measured is greater than what the scale can handle.

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Explanation:

physics allow us to understand the electromagnetic radiation we used to transmit data with fibre optics and satellites and to build computers that interpret those signals and transmit data on the internet

When the volume of a cylinder filled with a gas is decreased by a piston, the pressure inside rises because of the increased frequency of collisions between gas particles.

This is due to the fact that when the available space is reduced, the particles are forced to move faster in order to maintain their average kinetic energy. Furthermore, the number of collisions between gas particles and the walls of the container increases, resulting in a higher pressure.

Additionally, as the volume decreases, the number of collisions between gas particles and each other increases, which also contributes to the rise in pressure. Therefore, when the volume of a cylinder filled with a gas is decreased by a piston, the pressure inside will rise due to the increased frequency of collisions between gas particles.

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Answer:

Electromagnets are special types of magnets that are made by passing current through coils of wire. To make an electromagnet, the minimum requirements are:

1. A nail (usually made of iron, steel or zinc)

2. Dry cell batteries

3. Wire (Usually copper wire)

Other things could be:

1. Electric tape to hold both ends of the wire properly at the battery terminals.

2. Scissors to cut the wire into desired length.

3. Iron fillings for testing purposes.

The terms are paired with their correct definitions as shown above.

Given is to match the terms with the correct definition.

We can write the pairs as -

{ 1 } → { b }

{ 2 } → { f }

{ 3 } → { a }

{ 4 } → { d }

{ 5 } → { e }

{ 1 } → { c }

Therefore, the terms are paired with their correct definitions as shown above.

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The molar solubility of La(IO₃)₃ in pure water is approximately 1.0 × 10⁻⁴ mol/L.

The molar solubility of a compound refers to the maximum amount of the compound that can dissolve in a given solvent at a specific temperature, typically expressed in moles per liter (mol/L). To determine the molar solubility of La(IO₃)₃ in pure water, we can use the given value of the solubility product constant (Ksp) for La(IO₃)₃, which is 1.0 × 10⁻¹¹.

La(IO₃)₃ dissociates into La³⁺ and IO₃⁻ ions in water. Let's assume x mol/L represents the molar solubility of La(IO₃)₃. According to the balanced chemical equation, one mole of La(IO₃)₃ produces one mole of La³⁺ ions and three moles of IO₃⁻ ions.

Therefore, the solubility product expression for La(IO₃)₃ is:

Ksp = [La³⁺][IO₃⁻]³

Since the concentration of La³⁺ ions is equal to the molar solubility (x) and the concentration of IO₃⁻ ions is three times the molar solubility (3x), we can substitute these values into the Ksp expression:

Ksp = (x)(3x)³

1.0 × 10⁻¹¹ = 27x⁴

Solving for x, we find:

x ≈ 1.0 × 10⁻⁴ mol/L

Therefore, the molar solubility of La(IO₃)₃ in pure water is approximately 1.0 × 10⁻⁴ mol/L.

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The rope will not break. Even though the two horses are pulling in opposite directions, their strength is identical and therefore cancels out.

The rope is not subjected to any greater force than when only one horse was pulling. If the rope was not strong enough to withstand the force of one horse, it would have broken when the first horse pulled on it.

This shows that maybe the rope is stronger and perhaps it was actually able to withstand the force than the horses when it is single and when now they are combined to form a greater force.

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There will be 109 decibels of sound. A person's hearing may be harmed if they hear sounds louder above a certain threshold.

We are given that,

Power = p = 70.0w

Surface area = A = 8.20m

The intensity of a sound is measured by its level. The intensity of sound is measured in decibels, The ratio of power to surface area is known as the sound level or the sound intensity.

Intensity = power/surface area

Intensity =  70.0w/4π× 8.20²m

Intensity = 0.082W/m²

The resulting value is converted into decibels as follows,

I = 10 × log1/110⁻¹²

I = 109decibels

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The energy gained when a 2 kg mass is lifted by 2 m on Jupiter is 100 J.

To calculate the energy gained when a 2 kg mass is lifted by 2 m on Jupiter, we can use the formula:

E = mgh

where E is the energy gained, m is the mass, g is the acceleration due to gravity, and h is the height the object is lifted.

In this case, g = 25 N/kg, m = 2 kg, and h = 2 m. Substituting these values into the formula, we get:

E = (2 kg)(25 N/kg)(2 m) = 100 J

Therefore, the energy gained by Jupiter when a 2 kg mass is lifted by 2 m is 100 J.

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