This crane is used to lift a load A which is 30m from the pivot. The downward force applied by the load is 5000N. Calculate the downward force applied by the counterweight which is 10m from the pivot.

The magnitude of energy that is lost due to friction is 73.7Joules.

In order to accomplish work and to produce heat and light, energy must be transferred to a body or to a physical system. Energy is the quantitative attribute that does this. Energy is a preserved resource; according to the rule of conservation of energy, energy can only be transformed from one form to another and cannot be created or destroyed.

Computers, vehicles, communications, state-of-the-art medical technology, and many other things are all powered by energy. The demand for dependable and economical energy is especially pressing for emerging countries. It can be beneficial and even life-saving.

Energy required by the body is the kinetic energy

Kinetic Energy = 1 / 2 mv²

m = mass

v = velocity

For the 5.3kg moving at 6.6m/s

kE = 1/2 * 5.3 * 6.6²

KE = 1/2 * 5.3 * 43.56

KE = 115.71Joules

for the 5.3kg moving at 4m/s

KE = 42 joules

Amount of energy lost

= 115.71Joules - 42 joules

= 73.7 joule

Thus, the amount of Energy lost is73.7Joules.

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In a Jules Verne novel, a piece of ice is shaped into a magnifying lens to focus sunlight to start a fire, this is possible to use a piece of ice as a magnifying lens to start a fire, but it requires specific conditions and techniques.

Firstly, the ice must be clear and free of impurities, as these would obstruct and scatter the light, making it difficult to focus. Secondly, the ice must be properly shaped into a convex lens that can concentrate sunlight onto a small area, similar to a standard magnifying glass. This can be done by carving and polishing the ice with a knife or other tools until it forms a smooth, rounded surface.

Once the ice lens is prepared, it is crucial to position it correctly between the sun and the kindling material. The focal point, where the sunlight is most concentrated, must be aimed precisely at the material to generate enough heat to ignite it. Dry leaves, grass, or other fine materials are the most effective for starting fires, as they catch fire more easily than thicker, denser substances. In conclusion, it is indeed possible to use an ice lens to focus sunlight and start a fire, as portrayed in Jules Verne's novel. However, this technique requires clear ice, proper shaping, and accurate positioning to be successful.

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Answer:

A

Explanation:

Because we need clean water to obtain a healthy diet, need oxygen which plants provide through photosynthesis and soil is important for food.

Correct option is D. (P x Y)/M and increases if dollars are exchanged more frequently.

The Quantity of theory of money states:

                     M * V = P * Y

Where,

          M = Money supply

          V = Velocity of money exchange

          P = The price level

          Y = Real GDP

- By re-arranging the formula and solving for "V" we have:

                    V = P × Y / M

- The expression on right hand side increases if exchange of dollars increases.

Monetary economics is a branch of economics that studies various money theories. The quantity theory of money is one of the primary research areas for this branch of economics (QTM). According to the quantity theory of money, the general price level of goods and services in an economy is proportional to the money supply.

While this theory was first proposed by Polish mathematician Nicolaus Copernicus in 1517, it was popularized later by economists Milton Friedman and Anna Schwartz following the 1963 publication of their book, "A Monetary History of the United States, 1867-1960."

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Answer:

The  distance traveled by the ball before it lands in the other player's glove is 130.96 m.

Explanation:

Given;

angle of projection of the ball, θ = 40⁰

initial velocity of the ball, u = 36.1 m/s

The distance traveled by the ball before it lands in the other player's glove is the range of the projectile, calculated as follows;

\(R = \frac{u^2 sin(2\theta)}{g} \\\\R= \frac{36.1^2 \times sin(2\times 40)}{9.8} \\\\R = \frac{36.1^2 \times sin(80)}{9.8} \\\\R = 130.96 \ m\)

Therefore, the  distance traveled by the ball before it lands in the other player's glove is 130.96 m.

Answer:

Explanation:The value of h used in the calculation is much less than 2.0m because the athlete's gravitational potential energy is only gained while they are in the air and so h represents the vertical height they achieved while they were airborne and not the total height of the bar.

Answer:

left side

Explanation:

It's smaller in length but still has a pretty close slope to the right side.

Answer:

Once a crystal has formed, it continues to form because as more atoms join and create a uniform and repetitive pattern the crystal grows. Crystals form from the outside, crystals are unlike biological systems and grow ethier form vapor, a melt or from a solution.

Explanation:

derive its name from a Native American word meaning wild onion

Explanation:

distance = speed x time

a- d= 350 m/s x 30s

   d= 10500m

b- 5 mins = 300 sec

    d= 350 m/s x 300s

    d= 105000 m

c-  30 mins = 1800 sec

    d= 350 m/s x 1800 s

   d=  630000 m

Answer:

Fluid theories of electricity are outdated theories that postulated one or more electrical fluids which were thought to be responsible for many electrical phenomena in the history of electromagnetism.

I hope it's helpful!

A collision that is fully elastic is one where there is no kinetic energy lost during the contact. In an inelastic collision, a proportion of the energy is converted into another kind of energy during the contact.

In elastic collisions, kinetic energy and momentum are both conserved. Consider two similar trolleys that are moving in the same direction at the same pace. With no loss of speed, they collide and bounce off one another. Since no power has been lost, this collision is fully elastic.

photo of A description of completely elastic collision

When a system's maximal quantity of kinetic energy is equal to zero, a relatively inelastic collision takes place.

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A collision that is fully elastic is one where there is no kinetic energy lost during the contact. In an inelastic collision, a proportion of the energy is converted into another kind of energy during the contact.

In elastic collisions, kinetic energy and momentum are both conserved. Consider two similar trolleys that are moving in the same direction at the same pace. With no loss of speed, they collide and bounce off one another. Since no power has been lost, this collision is fully elastic.

photo of A description of completely elastic collision

When a system's maximal quantity of kinetic energy is equal to zero, a relatively inelastic collision takes place.

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The graphs display the function solution y = ex and three numerical solutions -Euler, Improved Euler, and Runge-Kutta- at different intervals. The Relative Deviation on the right measures the difference between the numerical solutions and the exact function solution.

The analysis of each set of graphs involves comparing the numerical solutions (Euler, Improved Euler, and Runge-Kutta) with the exact function solution y = ex. The Relative Deviation provides an indication of how closely the numerical solutions approximate the exact solution.

To analyze each set of graphs, follow these steps:

By examining the graphs and assessing the Relative Deviation, one can analyze the accuracy and performance of the numerical solutions -Euler, Improved Euler, and Runge-Kutta- in approximating the exact function solution y = ex at different intervals or iterations.

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Starting from rest, the disc completes \(\theta\) revolutions after \(t\) seconds according to

\(\theta=\dfrac\alpha2t^2\)

with angular acceleration \(\alpha\). It completes 10 rev in 2 s, which means

\(10\,\mathrm{rev}=\dfrac\alpha2(2\,\mathrm s)^2\implies\alpha=5\dfrac{\rm rev}{\mathrm s^2}\)

Find the time it takes to complete 20 rev with this acceleration:

\(20\,\mathrm{rev}=\dfrac12\left(5\dfrac{\rm rev}{\mathrm s^2}\right)t^2\implies t=\sqrt8\,\mathrm s\approx2.83\,\mathrm s\)

so it takes approximately 0.83 s to complete 10 more rev.

The entropy changes of 0.20 mol of potassium when its temperature is lowered from 3.8 K to 1.2 K is given by -48.3 J/K.

The entropy change, ΔS, can be determined using the equation:

ΔS = ∫(Cp/T)dT

where Cp is the molar heat capacity at constant pressure and T is the temperature. To solve the integral, we need to know the temperature dependence of Cp for potassium. Assuming Cp is constant over the given temperature range, we can simplify the equation as follows:

ΔS = Cp∫(1/T)dT

Integrating with respect to T, we have:

ΔS = Cp[ln(T)]₂₃.₈¹.₂ = Cp[ln(1.2) - ln(3.8)]

Since we have 0.20 mol of potassium, we need to multiply the above result by the molar quantity:

ΔS = 0.20 mol × Cp[ln(1.2) - ln(3.8)]

Therefore, the entropy changes of 0.20 mol of potassium as its temperature decreases from 3.8 K to 1.2 K is -48.3 J/K.

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Answer:

    flow of electron is just opposite to the flow for current. Electrons flow from the negative terminal to the positive. Conventional current or simply current, behaves as if positive charge carriers cause current flow. Conventional current flows from the positive terminal to the negative.

Answer:

a lever that is what is used

Answer:

it is true

Explanation:

because the backward force you feel when your car accelerates is caused by your body's inertia

Answer:

C book sitting on a shelf.

Explanation:

An object can store energy as the result of its position. For example, the heavy ball of a demolition machine is storing energy when it is held at an elevated position

plz mark brainliest

Carbonic acid, which is frequently found in carbonated beverages such as soda, is denoted by the chemical formula H2CO3. In contrast, the formula H2C6H6O6 pertains to a different compound, which is a type of organic acid.

Based on the information provided, it appears that your acquaintance is requesting a beverage that does not contain carbonic acid but does contain an organic acid with the formula H2C6H6O6.

Lemonade, which includes citric acid, is one prevalent type of drink that fits this description. Citric acid's chemical formula is C6H8O7, but it can also be written as H3C6H5O7 or H2C6H6O6 if only the acidic properties of the molecule are considered.

As a result, if your friend requests a drink that does not contain H2CO3 but does contain H2C6H6O6, he may be requesting lemonade or another form of beverage containing citric acid.

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Answer:

ANSWER:

(a) 108 J

(b) 0 J

(c) 108 J

STEP-BY-STEP EXPLANATION:

(a)

Express the relation between horizontal component of work done and force on the crate:

Here Wh is the horizontal component of the work done on the crate and Fh is the horizontal component of force and d is the distance of the crate across the floor.

Replacing:

(b)

Express the relation between vertical component of work done and force on the crate:

Here Wv is the vertical component of the work done on the crate and Fv is the vertical component of force and d is the distance of the crate across the floor.

Replacing:

(c)

Express the relation for total work done by the 45 N force:

Answer:

15284.35 Joules

Explanation:

Here is an equation we can use.

Work + Initial PE + Initial KE = Final PE + Final KE + heat lost

\(W+mgh_i+\frac{1}{2}mv_i^{2} =mgh_f+\frac{1}{2}mv_f^{2}+F_Fd\)

Solving for W gives us.

\(W=-(mgh_i)-(\frac{1}{2}mv_i^{2}) +mgh_f+\frac{1}{2}mv_f^{2}+F_Fd\)

In this case we can assume the initial height is 0. So there is no Initial PE.

We can assume the box started at 0 m/s. So there is no Initial KE

The box gained height as it moved up the incline. So there is Final PE.

We can assume the box moved at a constant speed. There was no acceleration on the box. So there is no Final KE.

\(F_F=F_N*u_k\)

\(F_N=mgcos(B)\)

\(F_F=mgcos(B)*u_k\)

\(W=mgh_f+F_Fd\)

\(W=mgh_f+mgcos(B)*u_k*d\)

\(h_f=d*sin(B)\)

\(W=m*g*d*sin(B)+m*g*cos(B)*u_k*d\)

Lets solve for \(W\)

We are given

\(m=200\)

\(g=9.81\)

\(B=20\)

\(u_k=0.6\)

\(d=8.6\)

Replace the variables with our given numbers.

\(W=200*9.81*8.6*sin(20)+200*9.81*cos(20)*0.6*8.6\)

\(W=15284.35\)

We can solve this problem using the conservation of energy principle, which states that the total mechanical energy (potential energy + kinetic energy) of a system remains constant if no external work is done on the system.

At the top of the hill, the car has only potential energy, given by:

PE = mgh

where m is the mass of the car, g is the acceleration due to gravity, and h is the height of the hill.

PE = (1000 kg) x (9.81 m/s^2) x (200 m) = 1,962,000 J

At the base of the hill, the car has only kinetic energy, given by:

KE = (1/2)mv^2

where v is the velocity of the car.

Using the conservation of energy principle, we can equate the potential energy at the top of the hill to the kinetic energy at the base of the hill:

PE = KE

mgh = (1/2)mv^2

Canceling the mass on both sides, we get:

gh = (1/2)v^2

Solving for v, we get:

v = sqrt(2gh)

Substituting the given values, we get:

v = sqrt(2 x 9.81 m/s^2 x 200 m) = 44.3 m/s

Therefore, the velocity of the car at the base of the hill is approximately 44.3 m/s.

When air has cooled below the dew point, it undergoes condensation.

What is Dew Point? Dew Point is the temperature at which the water vapour present in the air turns into liquid water. When air is cooled, it loses its ability to carry as much water vapour. As a result, the water vapour condenses into liquid water. This process of water vapour turning into liquid water is known as condensation. What is Condensation?Condensation is the process of the water vapour present in the air transforming into liquid water. It usually occurs when the air has cooled down, and the temperature has fallen below the dew point. The dew point is the temperature at which the water vapour starts to condense into liquid water. Condensation takes place when the moisture in the air comes into contact with a surface that is cooler than the surrounding air and has a temperature below the dew point.

Air that has cooled below the dew point undergoes condensation, which is the process of water vapour transforming into liquid water. This process occurs when the temperature has fallen below the dew point, which is the temperature at which the water vapour present in the air starts to condense into liquid water.

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Measuring the focal length of the diverging lens is possible by thin lens equation.

A lens thicker at its edges than at its center is called a diverging lens. It is also called a negative lens or concave lens.

The focal length for a diverging lens is negative.

The thin-lens equation gives a relationship between image i and object o ​distances with the focal length f as below-

\(\frac{1}{f} = \frac{1}{i}+\frac{1}{o}\)

Magnification formula is also provide a relationship between image and object distances or the heights of the image and object.

The focal length is always negative, an object in front of the lens the object distance is positive.

For virtual images, the image distance is negative.

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Since a diverging lens diverges rays that can never collide to form a true image, it is impossible to directly measure the focal length of one. The converging lens's function is to assist in creating an actual image that serves as the diverging lens' target.

This experiment aims to quantify the power and focal length of a diverging lens. Since negative or diverging lenses cannot create accurate representations of actual objects, a converging lens must be used to set up a virtual experiment for the diverging lens.

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Answer:

B

Explanation:

A P E X

To find the missing side in each triangle, we need more information or measurements. Without specific values for the angles or sides of the triangles, we cannot determine the missing side lengths.

To find the missing side in a triangle, we typically use trigonometric ratios such as sine, cosine, or tangent. However, in this case, the problem statement does not provide any angles or side lengths for the triangles. Without these measurements, it is impossible to determine the missing side lengths. We need specific values to apply trigonometric ratios or other geometric properties to solve the problem accurately.  Without specific values for the angles or sides of the triangles, we cannot determine the missing side lengths.

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Answer:

WDYM?

Explanation:

Answer: Get therapy (not like actually lol but like you know...)

Explanation: Listen to calming music or your favorite music, read, draw, color, literally anything that makes you calm