An ion gains 3.9 × 10–18 J of electric potential energy as it moves 22 mm at a 120° angle to a uniform electric field. The electric field strength is 740 N/C.
a) What is the charge of the ion?
b) What is the potential difference between the oil droplet’s starting point and end point in the Sample Problem above?

Answer:

It is (a) pull because when we are on earth we have gravity and it is pulling us down hope you have a great day!! :)

Explanation:

Answer:

*Answers are in their respective order with the questions.

\(1500\:\mathrm{J},\\4500\:\mathrm{J},\\5.52\:\mathrm{m}\)

Explanation:

The [gravitational] potential energy of an object is given by \(PE=mgh\), where \(m\) is the mass of the child, \(g\) is acceleration due to gravity, and \(h\) is the height of the object (relative to the ground).

"If the mass of the boy is tripled, how much potential energy does the child have at the top of his jump?"

Without actually plugging and chugging, notice the formula in which gravitational potential energy is given. Potential energy is directly proportional to mass. Therefore, if the mass of the boy is tripled, his potential energy will also be tripled, yielding an answer of \(500\cdot 3=\boxed{1500\:\mathrm{J}}\)

"If the same boy's mass is doubled, but his height is quadrupled, how much potential energy does the child have at its maximum and in what position in the jump will he be?"

In similar fashion to the first question, we can note that the potential energy of an object is directly proportional to its mass and height. Therefore, if the boy's mass is doubled and his height is quadrupled, his potential energy will be \(2\cdot 4=8\) times as large at maximum height. Thus, he will have \(500\cdot 8 =4,000\:\mathrm{J}\) of potential energy at the maximum height. I'm assuming that "in what position in the jump will he be?" is asking for the height at the maximum height of the jump.

The original height can be solved using:

\(PE=mgh,\\500=37\cdot 9.8\cdot h,\\h=\frac{500}{37\cdot 9.8}=1.37892995036\:\mathrm{m}\)

Quadrupled implies being multiplied by four. Therefore, we have:

\(h'=1.37892995036\cdot 4=5.51571980143\approx \boxed{5.52\:\mathrm{m}}\)

The "price" that you have to pay for this help is by covering more distance

when using it.

Wheel and axle is a type of lever which has three properties present and

they include

It helps to reduce the force needed to do work and makes it easier thereby

saving strength and resources. Work done is the product of force and

distance traveled.

Since force is reduced in this type of lever then more distance has to be

covered for work to be done efficiently.

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Answer:

distance and the amount of the force

Explanation:

moment = f x d

a) The isocost curve equation is G = (20000 - 100C)/500. b) The isocost curve equation is G = (30000 - 100c)/500. c) The isocost curve equation is G = (20000 - 100C)/375. d)  The isocost curve equation is G = (20000 - 120C)/500.

To draw the isocost curve showing the different combinations of gas and coal, we need to use the cost per unit values for coal and gas, as well as the given expenditure (TC) and the changes in expenditure or prices.

Let's denote the quantity of coal as C and the quantity of gas as G. The cost per unit of coal is 100, and the cost per unit of gas is 500.

(a) Initial expenditure (TC) of 20000:

To find the combinations of gas and coal that can be purchased with an initial expenditure of 20000, we can use the following isocost equation

TC = 100C + 500G

We can rearrange the equation to solve for G in terms of C

G = (TC - 100C) / 500

Now we can plot the isocost curve with TC = 20000 using the equation above.

(b) Expenditure (TC) increases by 50%

If the expenditure increases by 50%, the new expenditure (TC_new) becomes 1.5 × TC = 1.5 × 20000 = 30000.

We can use the same isocost equation as before, but with the new expenditure value:

TC_new = 100C + 500G

Rearranging the equation to solve for G

G = (TC_new - 100C) / 500

Now we can plot the isocost curve with TC_new = 30000.

(c) Gas price reduced by 25%:

If the gas price is reduced by 25%, the new cost per unit of gas (Gas_new) becomes 0.75 × 500 = 375.

We can use the original isocost equation, but with the new cost per unit value:

TC = 100C + 375G

Rearranging the equation to solve for G

G = (TC - 100C) / 375

Now we can plot the isocost curve with the reduced gas price.

(d) Coal price rises by 20%

If the coal price rises by 20%, the new cost per unit of coal (Coal_new) becomes 1.2 × 100 = 120.

We can use the original isocost equation, but with the new cost per unit value:

TC = 120C + 500G

Rearranging the equation to solve for G:

G = (TC - 120C) / 500

Now we can plot the isocost curve with the increased coal price.

By plotting these isocost curves on a graph with G on the y-axis and C on the x-axis, we can visualize the different combinations of gas and coal that can be purchased at the given expenditures or price changes.

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Answer:

Thermosphere A,B

Mesosphere B,C,D

Stratosphere D,E,F

Troposphere G

Hope this helps please give me brainliest!

God bless :)

The diagram and information in the section "Stages of Photosynthesis" provide a coherent understanding of the light and dark reactions of photosynthesis.

The light-dependent reactions occur in the thylakoid membranes of the chloroplasts and are driven by light energy. The light energy is absorbed by pigments such as chlorophyll and converted into chemical energy in the form of ATP and NADPH. The light-dependent reactions also produce oxygen gas as a byproduct.

The ATP and NADPH produced in the light-dependent reactions are then used in the light-independent reactions, which occur in the stroma of the chloroplasts. The light-independent reactions, also known as the Calvin cycle, use carbon dioxide and the energy from ATP and NADPH to synthesize glucose and other organic compounds. The Calvin cycle does not directly require light, but it is dependent on the products of the light-dependent reactions.

Together, the light-dependent and light-independent reactions of photosynthesis form a coherent cycle that allows plants and other photosynthetic organisms to convert light energy into chemical energy in the form of glucose and other organic compounds. The diagram and information in the section "Stages of Photosynthesis" provide a clear visual and textual representation of this process, helping to develop a coherent understanding of the overall process of photosynthesis.

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Answer:

Explanation:

given:

jogger displacement (distance) = 0.200 km

time = 16.5 sec.

find:

1. velocity in m/s

2. velocity in km/hr.

solution:

velocity = distance / time

1.  velocity = 0.200 km x   1000 m

                     16.5 sec             1 km

                  = 12.1 m/s.

2.  velocity = 0.200 km x   3600 sec.

                     16.5 sec             1 hr.

                   = 43.3 km/hr.

Answer:

The number of protons in the nucleus of the atom is equal to the atomic number (Z). The number of electrons in a neutral atom is equal to the number of protons. The mass number of the atom (M) is equal to the sum of the number of protons and neutrons in the nucleus.

Explanation:

It would take approximately 28.6 years to recover the investment in changing the insulation in terms of heating cost savings.

Changing the protection to build the energy effectiveness of your home can bring about massive expense reserve funds on warming. In this situation, changing the protection to make your home 85% energy productive would cost $3000.

Expecting the expense of warming is 7 pennies/kWh, we can work out the energy reserve funds and the compensation time frame for the interest in changing the protection. To work out the energy reserve funds, we want to decide the distinction in energy utilization when the protection is changed.

The energy utilization prior to changing the protection depends on the ongoing energy productivity of the house. Expecting the yearly warming energy utilization is 10,000 kWh, the energy utilization prior to changing the protection would be:

Energy utilization previously = 10,000 kWh/(1-0.85) = 66,667 kWh

Subsequent to changing the protection, the energy utilization would be:

Energy utilization later = 10,000 kWh/(1-0.85) = 66,667 kWh

The energy investment funds would be the contrast between the two:

Energy investment funds = Energy utilization previously - Energy utilization later

Energy investment funds = 0 kWh

This implies that changing the protection wouldn't bring about any energy reserve funds, and hence there would be no compensation period for the speculation.

It is essential to take note of that this situation accepts that the energy utilization is exclusively founded on warming and that the main element influencing energy productivity is the protection. Truly, energy utilization is impacted by many variables, including the kind of warming framework, the environment, and the way of behaving of the tenants.

Furthermore, changing the protection can have different advantages, like expanding the solace of the house and diminishing commotion contamination. Subsequently, it is essential to consider all elements while coming to conclusions about expanding the energy effectiveness of your home.

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The complete question is:

Your heating system is 45 percent energy efficient.

A) What amount of energy would it consume to transform 9000 kWh into useful thermal energy for heating the house during the winter?

B) Changing the insulation would increase your house to 85 percent energy efficient. The cost to change the insulation is 3000$. The cost of heating is 7 cents/ kWh. How many years will it take to recover your investment?

The wall of a fruit, advanced from the ovary wall. The ripened and variously changed partitions of a plant ovary.

Consisting of the outer exocarp, significant mesocarp and internal endocarp, that is the wall of a plant fruit that develops from the ovary wall.

Pericarp: ↑ The a part of the fruit that surrounds the seed(s). The pericarp is shaped via way of means of 3 wonderful layers: exocarp, mesocarp, and endocarp.

Dehiscence: Splitting open at adulthood which will launch its contents (example: the fruit splits to launch the seeds). Children withinside the Southeastern United States play with pink maple culmination (Acer rubrum). The culmination are tossed withinside the air and spin again to the floor, performing like small helicopters. the culmination are tossed withinside the air and spin again to the floor performing like small helicopters, which a part of the fruit permits for this.

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This is not a gamma radiation because there is a change in the atomic number of the daughter nucleus. It is rather a beta decay.

We have to note that when we talk about a decay we are talking about the manner that we can be able to break up the atom of a radioactive substance so that we can be able to produce a new substance.

We can see now that what we have here is the loss of a beta ray or an electron from the specie that is shown. This is evidenced by the change in the atomic number of the daughters nucleus.

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Answer:

D. muscular strength

Explanation:

Lifting any weight requires force to lift it. This force is the result of the muscular strength of the body. It is the muscular strength that determines the weight that a body can lift without any exhaustion. Muscular strength depends on the size of the muscular fibers and the nerves' ability. They help in activating the strength of the muscle. Lifting the objects and the ability to lift it are the outcome of the strength muscles have.

In the given situation, Dawn is trying to find her muscular strength.

Answer:

d

Explanation:

d

Answer:

0 ms-1

Explanation:

This is a trick question.

* Don't be confused with average speed with average velocity

Since the runner ends in the same spot as she started,

the total displacement covered by the runner is zero.

Since  average velocity = total displacement/total time,

As total displacement is zero ,

average velocity = 0 / 50  ms-1

                            = 0 ms-1

Answer:

Since the five forces applied are all in the same direction with the motion of the sled, to solve for the net force, add the five forces together. Therefore, the net force is 30 Newtons.

Explanation:

Answer: The answer is Skill

Explanation:

Answer:

-1650 J

Explanation:

When an object moves at a certain velocity v0 and changes it to v1, a change in its kinetic energy is achieved.

Answer:

3mph

Explanation:

a=v(final)-v(initial)/t

=45-15/10

=30/10

=3mph

Answer:

3mph

Explanation:

Explanation:

The relationship among u, v, and f in the context of a lens can be described by the lens formula:

1/v - 1/u = 1/f

where:

- u is the object distance (distance between the object and the optical center of the lens),

- v is the image distance (distance between the image and the optical center of the lens), and

- f is the focal length of the lens.

According to the lens formula, the reciprocal of the image distance subtracted from the reciprocal of the object distance is equal to the reciprocal of the focal length.

Answer:

P=F/A where F is the weight of the water and A is the area on which it is resting. The weight of the water is mg. The mass of the water is dv where d is the density and v is the volume. Finally, the volume of the water in a vessel is equal to the area of the base of the vessel times the height of the vessel. (v=Ah)

Plugging everything in we get:

P = dAhg/A

So

P=dhg

So we have shown that liquid pressure is directly  proportional to height of liquid in a vessel.​

The greenish-blue color of water is evidence for the absorption of red light.

The water absorbs the red frequency of light and reflects or transmits the remaining frequencies, which in this case are mainly green and blue. This absorption process is also known as selective absorption. It is the reason why water appears blue or greenish-blue in color. The interaction between green and blue frequencies of light also plays a role in the color of water, but it is not the main reason for the color we observe. Reflection of red light and reflection of greenish-blue light are not significant factors in the color of water.
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Answer:

These two skaters have just pushed off against one another .One skater has twice the mass as the other. Which one willexperience the greater momentum?

Explanation:

mark Brainliest

Answer:

v=11.8m/s

Explanation:

speed of the ball

Force=mass*centripetal acceleration

Centripetal acceleration= V2/r

F=M*V2/r

Data

F=310N

M=2.0kg

r=0.90m

v=?

310N=(2.0kg)*V2/0.90m

cross multiply

279Nm=(2.0kg)V2

V2= 279Nm/2.0kg

V2=139.5Nm/kg

apply square root both sides

√V2=√139.5

V=11.8m/s

It would take 1.556 seconds for the barrier to crumple and safely slow down the person with a force of 1180 N.

To calculate the time required to crumple the barrier and safely slow down the person, we can use the concept of impulse.

The impulse, denoted by J, is defined as the product of force and time, and it represents the change in momentum of an object. In this case, the impulse required to safely slow down the person can be calculated using the maximum force and the person's initial momentum.

The momentum of a person is given by the product of their mass and velocity:

Momentum = mass × velocity

Given that the person's mass is 68 kg and their velocity is 27 m/s, the initial momentum is:

Initial momentum = 68 kg × 27 m/s

To safely slow down the person, the impulse provided by the barrier should be equal to the change in momentum.

Therefore, we have:

Impulse provided by barrier = Final momentum - Initial momentum

Since the person is brought to rest, the final momentum is zero. Thus, we have:

Impulse provided by barrier = -Initial momentum

Now we can express the impulse in terms of force and time:

Impulse provided by barrier = Force × Time

Plugging in the known values, we can solve for time:

-Initial momentum = Force × Time

68 kg × 27 m/s = 1180 N × Time

Simplifying the equation, we find:

Time = (68 kg × 27 m/s) / 1180 N

Evaluating the expression:

Time = 1836 kg·m/s / 1180 N

Finally, converting kg·m/s to seconds, we get:

Time ≈ 1.5559 seconds

Therefore, it would take approximately 1.556 seconds for the barrier to crumple and safely slow down the person with a force of 1180 N.

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Elasticity is of significant importance in the everyday lives of businesses and consumers as it helps them understand and respond to changes in prices and demand for goods or services. By considering elasticity, businesses can make informed decisions regarding pricing strategies, production levels, and resource allocation. Consumers, on the other hand, can assess the impact of price changes on their purchasing decisions and adjust their consumption patterns accordingly.

Elasticity, specifically price elasticity of demand, measures the responsiveness of consumer demand to changes in price. It indicates the percentage change in quantity demanded resulting from a one percent change in price. Understanding price elasticity allows businesses to determine how sensitive consumers are to changes in price and adjust their pricing strategies accordingly.

For example, let's consider the market for gasoline. Gasoline is a highly price-sensitive good, meaning that changes in its price have a significant impact on consumer demand. If the price of gasoline increases, consumers may reduce their consumption and seek alternatives such as carpooling or using public transportation. In this scenario, businesses need to consider the price elasticity of gasoline to predict and respond to changes in consumer behavior. They might lower prices to stimulate demand or introduce more fuel-efficient options to cater to price-conscious consumers.

In conclusion, elasticity matters because it provides valuable insights into the dynamics of supply and demand, enabling businesses and consumers to make informed decisions in response to price changes. By understanding elasticity, businesses can adapt their strategies to maintain competitiveness, while consumers can optimize their purchasing choices based on price sensitivity.

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Answer:

the last one

Explanation:

its the sun when the earth turns towards the sun it gives us heat not solar radiation.

It requires 9600 joules of work to get the wheelbarrow across the yard in 12 seconds. Rounded to the nearest whole number, the answer is 9600 J.

Power is the rate at which work is done or energy is transferred, and it is measured in watts (W). Work is the amount of energy required to move an object, and it is measured in joules (J). Time is the duration over which work is done, and it is measured in seconds (s). Power is calculated by dividing the amount of work done by the time taken to do it, or by multiplying force by velocity. Mathematically, we can represent the relationship between power, work, and time as: Power = Work / Time

We can use the formula: Work = Power x Time

To find the work required, we can plug in the given values:

Work = 800 W x 12 s

Work = 9600 J

Therefore, it requires 9600 joules of work to get the wheelbarrow across the yard in 12 seconds. Rounded to the nearest whole number, the answer is 9600 J.

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A positively charged object would attract negative charges from the electroscope, reducing the positive charge on the top plate and causing the foil leaves to move closer together. Option C

When an electroscope is given a positive charge, the foil leaves will separate due to the repulsion between the like charges. When an object is brought near the top plate of the electroscope, it will influence the distribution of the charges on the electroscope, causing the foil leaves to either move closer or further apart.
If the foil leaves separate even further, it means that the object brought near the electroscope is causing the top plate of the electroscope to become even more positively charged. This would happen if the object has a negative charge, as the negative charges on the object would attract positive charges from the electroscope and cause them to accumulate on the top plate, further separating the foil leaves.
Therefore, we can conclude that the object is negatively charged, option (C). This is because a positively charged object would attract negative charges from the electroscope, reducing the positive charge on the top plate and causing the foil leaves to move closer together. If the object was electrically neutral, it would have no effect on the electroscope and the foil leaves would remain the same distance apart.
Option (D) is incorrect because it suggests that any charged object could cause the foil leaves to separate even further, regardless of the type of charge. Option (E) is also incorrect because an uncharged object would have no effect on the electroscope and the foil leaves would remain the same distance apart. So, option C is correct.

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The reason for the deflection of the compass from the magnetic north of the Earth when a current-carrying wire is placed over Magnetic effect due to current carrying wire.

What is Magnetic effect ?

Magnetic effect refers to the influence that a magnet or a magnetic field has on other magnets, magnetic materials, or moving charges. This effect is a result of the physical properties of magnetic fields, which are created by moving charges, such as electrons.

The magnetic effect is responsible for various phenomena, including the attraction or repulsion of magnets, the creation of magnetic fields around current-carrying wires, the behavior of moving charges in a magnetic field, and the generation of electricity in electric generators.

The reason for the deflection of the compass from the magnetic north of the Earth when a current-carrying wire is placed over it is option (a) - Magnetic effect due to current carrying wire.

When a current flows through a wire, it creates a magnetic field around the wire. This magnetic field can interact with the magnetic field of the Earth, causing the compass needle to deflect from its original direction. This phenomenon is known as the magnetic effect of a current-carrying wire.

Therefore, she action of connecting a battery to the wire and placing it over the compass caused a current to flow through the wire, which in turn created a magnetic field around the wire, leading to the deflection of the compass needle.

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Answer: 31N

Explanation:F = m x a

F = 8.5 x 3.7

F = 31.45

F = 31 (rounded)

F = 31 N