venus' rotation on its axis group of answer choices is retrograde, unlike most other solar system objects. is the fastest of the terrestrial planets. shows it is tidally locked in its orbit around the sun. is highly tilted to its orbital plane, causing large seasonal changes.

The kinetic energy of the emitted electrons is 11.24 eV.

The following is the physics definition of kinetic energy:

The amount of effort that a moving object may accomplish is measured by its kinetic energy.

Kinetic energy is a scalar quantity that can only be fully explained by its magnitude.

Given parameters:

Wavelength of ultraviolet light : λ = 75.0 nm.

Energy of the ultraviolet light: E = hc/λ = 1242/75.0 eV= 22.84 eV

Potential energy of a electron of   hydrogen atoms in the ground state is -13.6 eV.

This energy of light supplies required potential energy to the emitted electron and kinetic energy of electron.

So,  the kinetic energy of the emitted electrons = 22.84 eV - 13.6 eV = 11.24 eV.

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Answer:

Break it into cubes. When you make the thing that is dissolving smaller, the surface area of the thing dissolving it is larger, making the jelly more exposed.

The product among alcohol, gasoline, travel souvenirs, cigarettes that will have elastic demand is cigarettes.

Elastic demand refers to a situation in which a change in the price of a good or service results in a more significant change in the amount demanded. When the percentage change in quantity demanded is greater than the percentage change in price, the demand for the product is said to be elastic.

When the quantity demanded of a product decreases significantly when the price rises, the demand for the product is said to be elastic. Similarly, when a slight change in price causes a significant change in quantity demanded, the demand is said to be elastic. Conversely, if a product's price increases by a small percentage, and the demand for the product decreases by a smaller percentage, the demand for the product is said to be inelastic.

Cigarettes, of all the products listed above, are likely to have an elastic demand.

This is because smokers who are addicted to cigarettes are more likely to quit smoking or reduce their consumption in response to an increase in the price of cigarettes compared to the other goods.

Thus, a slight increase in the price of cigarettes is likely to cause a significant decrease in the number of cigarettes consumed.

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so the resulting force of all the 3 forces is 11.7 N.

As shown in the figure below ther is 3 forces \(F_1 ,F_2 ,F_3\) are the forces so that the diagram is along the directions given in the question

so \(F_1\) = 3 j^ ( where j^ is unit vector along y axis)

\(F_2\) = 6 cos 45  i^ + 6 sin 45 j^ ( where i^ is unit vector along x axis)

\(F_3\)  = - 5 sin 30 i^ + 5 cos 30 j^

so the resultant force = \(F_1+ F_2 +F_3\)

=> 3 j^ + 4.24 i^ + 4.24 j^ + 4.33 j^ - 2.5 i^

=> 1.74 i^ + 11.57 j^

so resultant force = \(\sqrt{1.74^2 + 11.57^2}\)

=> \(\sqrt{136.89}\)

=> 11.7 N

so the resulting force of all the 3 forces is 11.7 N

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Answer:

We can use Coulomb's law to solve this problem:

F = k * q1 * q2 / r^2

where F is the force between the two charges, k is Coulomb's constant (k = 9 x 10^9 N m^2 / C^2), q1 and q2 are the magnitudes of the charges, and r is the distance between them.

We know the force F, the distance r, and the magnitude of one of the charges q1. We can rearrange the equation to solve for the magnitude of the other charge q2:

q2 = F * r^2 / (k * q1)

Substituting the values we have:

q2 = (250 N) * (0.15 m)^2 / (9 x 10^9 N m^2 / C^2 * 6.5 x 10^-5 C)

Simplifying:

q2 = 8.65 x 10^5 C

Therefore, the magnitude of the other charge is 8.65 x 10^5 C.

Answer: Experimental design means creating a set of procedures to test a hypothesis. A good experimental design requires a strong understanding of the system you are studying. By first considering the variables and how they are related ( Step 1 ), you can make predictions that are specific and testable

Explanation:

A hypothesis (plural hypotheses) is a proposed explanation for a phenomenon. For a hypothesis to be a scientific hypothesis, the scientific method requires that one can test it. Scientists generally base scientific hypotheses on previous observations that cannot satisfactorily be explained with the available scientific theories. Even though the words "hypothesis" and "theory" are often used interchangeably, a scientific hypothesis is not the same as a scientific theory. A working hypothesis is a provisionally accepted hypothesis proposed for further research, in a process beginning with an educated guess or thought.

The force F1 is equal and opposite to the downward force thus, F1 is equal to 60 N. The force F2 is inclined to 30 ° from leftward force and it is equal to 38.97 N in magnitude.

Force is an external agent acting on a body to deform it or to change its state of motion or rest. Force is a vector quantity and it is characterised by its magnitude and direction.

If two forces acting on a body from the same directions, then the net force will be the sum of these two forces. If they are acting from opposite directions, they will cancel each other in magnitude.

The force F1 is equal and opposite to the force acting downward. Thus its magnitude is 60 N. The force F2 is inclined to 30 ° from horizontal direction.

F2 = 45 cos 30 = 38.9 N.

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Answer:

25

Explanation:

I just did this

Answer:

Acceleration

Explanation:

Momentum is acceleration because acceleration is movement and momentum is movement.

Momentun = Movement

Acceleration = Movement

Momentum = Acceleration

Answer:

Earth is made mostly of silicate rock in its crust and mantle, iron-nickel metal in the core. This is like some other planets -- but very unlike others.

Answer:

23.585°C

Explanation:

500W/s = 500J/s half a minute = 30s

30 x 500J = 15000J in half a minute

the specific heat of water is 4.184J/gC

Use the specific heat formula:

(20C)(1kg)(4184J/kgC)= 83680J

83680J + 15000J = 98680J

98680J = (x)(1kg)(4184J/kgC)

98680J = 4184x

Divide

x = 23.585°C

Suppose you compute a confidence interval with a sample size of 22. If the sample size increases to 49, the confidence interval gets smaller

Define confidence interval (CI)

An unknown population parameter's value is likely to be within the bounds of a confidence interval (CI), which is a range of values. Given the qualities of your sample data, these intervals reflect a likely domain for the parameter. Confidence intervals are computed using a predetermined degree of confidence and are obtained from sample statistics.

The confidence interval widens as the level of confidence is raised (for example, from 95% to 99%), keeping the sample size and variability constant. The range is instead made smaller by lowering the confidence level (for instance, from 95% to 90%). The more representative your sample is of the population, the more confident you can be in their responses. This shows that the smaller your confidence interval is for a given confidence level, the larger your sample size.

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Rahul should change the lengths of the vectors that point tangent to the circle so that each is the same length.

Uniform Circular Motion:

A uniform circular motion is a motion in a circle where the tangential speed of the object is constant.

In the motion map:

In this motion map,  the length of the vectors pointing tangent to the circle is not constant: this means that the speed is not constant. In order to have a uniform circular motion, the speed must be constant, therefore the lengths of the vectors that point tangent to the circle must be the same.

Thus, we can conclude that Rahul should change the lengths of the vectors that point tangent to the circle so that each is the same length.

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The scalar components R and R₂ of the force R along the nonrectangular axes a and b are determined using given information. The orthogonal projection Pa of R onto axis a is also calculated.

Given information:

Magnitude of force R = 810 N

Angle between R and axis a = 117°

Angle between R and axis b = 25°

To find the scalar components R and R₂, we can use trigonometry. Let's denote the angle between R and the x-axis as θ. We can express R in terms of its components as follows:

R = R₁ + R₂

Where R₁ is the component of R along axis a, and R₂ is the component of R along axis b.

Using trigonometry, we can determine the values of R₁ and R₂ as follows:

R₁ = R cos(θ)

R₂ = R sin(θ)

To find the angle θ, we subtract the given angles between R and axes a and b from 90° (since axis a and b are nonrectangular):

θ = 90° - 117° = -27°

Now we can calculate R₁ and R₂ using the given magnitude of R and the calculated angle θ:

R₁ = 810 N cos(-27°)

R₂ = 810 N sin(-27°)

Finally, to determine the orthogonal projection Pa of R onto axis a, we use the formula:

Pa = R₁ = 810 N cos(-27°)

Substituting the values into the equations, we can calculate the numerical values of R₁, R₂, and Pa.

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Answer:

D. all the above

Explanation:

Took the quiz.

Answer:   D) all the above

Explanation:   :)

Eating less red meat so fewer cattle need to be raised would help reduce global warming.

The production of red meat, particularly beef, is a major contributor to greenhouse gas emissions. Cattle produce methane, a potent greenhouse gas, and the production of feed for cattle also requires large amounts of energy, water and land. Additionally, the clearing of forests for grazing land and feed production also contributes to carbon emissions.

Riding a bicycle rather than walking to school would also help reduce global warming because it would decrease the amount of CO2 emissions produced by cars and other vehicles.

Clearing more forests to produce more farmland and using more fertilizers to increase crop production would not help to reduce global warming, as the clearing of forests causes a release of stored carbon into the atmosphere and the use of fertilizers and pesticides also has an environmental impact.

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A protective layer that shields the surface from lethal ultraviolet light is found in second layer of the atmosphere i.e., stratosphere.

More about ozone

The ozone layer is a component of the stratosphere, which is the second layer of the Earth’s atmosphere. The stratosphere is the name given to the layer of insulating gases that clings to our globe.

Ozone is a trace gas since there are only around 3 of its molecules in the atmosphere for every 10 million air molecules. But it serves an important purpose.

Like a sponge, the ozone layer absorbs sunlight that reaches Earth. While some of the sun’s radiation is essential for our survival, excessive amounts can be harmful to other living things.

The ozone layer shields life on Earth.

Benefits of ozone

Ozone does a good job of trapping ultraviolet radiation, also known as UV light, which may damage DNA molecules in plants and animals and penetrate protective layers on creatures like the epidermis.

The two primary subtypes of UV light are UVB and UVA.

UVB causes skin conditions including sunburns and cancers like basal cell carcinoma and squamous cell carcinoma.

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Answer:

In the Stratosphere

The protective layer is made of OZONE (O3). It shields us from the Sun's ultraviolet light. If the Ozone layer in the stratosphere becomes thin (letting more ultraviolet light through) it can lead to light and severe health effects, both to humans and animals, and can even affect food webs. In people, excess UV light can lead to certain forms of cataracts, increase in burns, cataracts, and sometimes even mutations (according to my FLVS Envornmental science course).

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she is k bads boy (into negative)

Answer:

The amount of energy in molecules of matter determines the state of matter. Matter can exist in one of several different states, including a gas, liquid, or solid state. These different states of matter have different properties

Explanation:

The most common states of matter on Earth are solids, liquids, and gases. How do these states of matter differ? Their properties are contrasted in different form

Answer:

Explanation:

Answer:

14.3 m/s

Explanation:

velocity equation

v= d/t

v= 60/4.2

v=14.28

round it to 1 decimal place

v= 14.3m/s

The resistance doubles if the length of a wire is increased by adding more wire, while the cross-sectional area remains unchanged.

The obstruction to current flow in an electrical circuit is measured by resistance. The Greek letter omega () represents the unit of measurement for resistance, known as ohms. Georg Simon Ohm (1784–1854), a German physicist who investigated the connection between voltage, current, and resistance, is the name given to the unit of resistance.

Using ohms () as the unit, resistance acts as a gauge to quantify how easily current will flow through a circuit. When resistance falls, current rises, and when resistance rises, current falls. In order to make sure that current flows in circuits at the proper rate, resistors are crucial.

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Answer:

Place the object on the disk and measure the distance from the center of the disk to the center of mass of the object by using a meterstick. Slowly increase the rate the disk rotates until the object begins to slide off the disk. Record the time in which the object makes one revolution around the center of the disk.

Explanation:

Draw a free body diagram.  There are three forces:

Weight force mg pulling down,

Normal force N pushing up,

Friction force Nμ pushing towards the center.

Sum of forces in the vertical direction:

∑F = ma

N − mg = 0

N = mg

Sum of forces in the centripetal direction:

∑F = ma

Nμ = m v²/r

mgμ = m v²/r

gμ = v²/r

μ = v² / (gr)

It takes T seconds for the object to move 2πr meters.

v = 2πr / T

Substituting:

μ = (2πr / T)² / (gr)

μ = 4π²r / (gT²)

The measurements you need are the distance between the object and the center of the disk (r) and the time it takes for one revolution (T).

A. The acceleration of the train is –0.68 m/s²

B. The stopping distance is 660 m

This is defined as the rate of change of velocity which time. It is expressed as

a = (v – u) / t

Where

a = (v – u) / t

a = (0 – 30) / 44

a = –0.68 m/s²

s = (v + u)t / 2

s = [(0 + 30) × 44]/ 2

s = (30 × 44) / 2

s = 1320 / 2

s = 660 m

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The length of the open-open pipe is 145 cm. When an open-closed organ pipe is 58.0 cm long. an open-open pipe has a second harmonic equal to the fifth harmonic of the open-closed pipe.

Given data :Length of open-closed organ pipe = 58.0 cm. We have to find: Length of open-open pipe To solve the problem, let’s first recall the formula for the frequency of a pipe and the harmonics of the pipe :

F = nv/2L where, F = frequency of the pipe v = speed of sound in air L = length of the pipe (open-closed or open-open) n = 1, 2, 3, 4, …. for the fundamental frequency and harmonics n = 1 for open-closed organ pipe n = odd numbers for open-open organ pipeLet’s begin by finding the fundamental frequency of the open-closed organ pipe:

f1 = v/2L ....(1)Putting the given values in equation (1), we get:f1 = v/2L = v/2 x 0.58 = v/1.16 cm³/s  

Let’s find the frequency of the 5th harmonic of the open-closed organ pipe: f5 = 5f1....(2)

Putting the value of f1 in equation (2), we get: f5 = 5 x f1 = 5 x v/1.16 cm³/s = 5v/1.16 cm³/s.

Now, let’s find the frequency of the 2nd harmonic of the open-open organ pipe:f2 = 2f1....(3)Putting the value of f1 in equation (3), we get:f2 = 2 x f1 = 2 x v/2L cm³/s= v/L cm³/sLet the length of the open-open organ pipe be L1.Substituting the given values of n and f5 in the formula of frequency for an open-open organ pipe:n = 5 and f5 = f2 => f2 = 5v/1.16 cm³/s=> f2 = v/L1 cm³/s ….(4)From equations (3) and (4), we have:v/L1 = v/L cm³/s=> L1 = 5/2 x L = 5/2 x 58 = 145 cm  

Therefore, the length of the open-open pipe is 145 cm.

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