Question: What factors affect the angle of the pith balls?
1. Observe : If necessary, turn on Show angle. What is the current value of θ?
2. Predict: Predict the effect of each change on the angle of the pith balls (θ). Fill in each blank with either "θ increases" or "θ decreases." Explain each of your predictions. A. g increases: g decreases: .Explain: B. Mass increases: Mass decreases: Explain: C. Length (L) increases: L decreases: .Explain:
3. Test: Use the Gizmo to test each of your predictions. Write your results below. A. g increases: g decreases: B. Mass increases: Mass decreases: C. L increases: L decreases:
4. Interpret: How is increasing the mass of the pith balls similar to increasing the value of g?
5. Think and discuss: Why does increasing the length of the string cause the angle of the pith balls to decrease? (Hint: Why wouldn’t you expect the angle to stay the same?)

Answer:B

Explanation:

The force of gravitation depends on the mass of the object. As the mass increases, the speed of the falling object also increases because it experience more gravitational pull from earth. Thus, option D is correct.

Gravitational force is a kind of force by which an object attracts other objects into its center of mass. We are all standing on the ground because of the gravitational pull of earth.

Gravitational force is directly proportional to the mass of the objects and inversely proportional to the distance from the surface. Therefore, the force exerted by earth on massive body is greater than that on a light body.

Here, the ball with greater  mass hit the ground with less time compared to the one with less mass. Hence, the mass becomes a factor  affecting the speed of a falling object when the object is dropped a great distance from the surface of the earth. Thus, the massive body will be pulled more by earth.

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The speed of light (c) in air is 2.99792 × 10^8 m/s, and the wavelength of visible light (λ) is 5 × 10^-7 m.

We can use the formula for the speed of light, which is:

c = λν

where ν is the frequency of the light wave.

Solving for ν, we get:

ν = c / λ

Substituting the values we have:

ν = (2.99792 × 10^8 m/s) / (5 × 10^-7 m)

ν = 5.99584 × 10^14 Hz

Therefore, the frequency of the light wave is approximately 5.99584 × 10^14 Hz.

Answer: The answer is A

Explanation:

They let him in his tribe and they became good friends.

Reconstruction was a success in that it restored the United States as a unified nation: by 1877, all of the former Confederate states had drafted new Reconstruction also finally constitutions, acknowledged the Thirteenth, Fourteenth, and Fifteenth their loyalty to the U.S. government. settled the states’ rights vs. federalism debate that had Amendments, and pledged been an issue since the 1790s.

Reconstruction failed by most other measures: Radical Republican legislation ultimately failed to protect federalism former slaves from white persecution and failed to engender fundamental changes to the social fabric of the South. When President Rutherford B. federalism debate that had been an issue since the 1790s almost mediately . Hayes removed federal troops from the South in 1877, former Confederate officials and slave returned to With the support of a conservative Supreme Court, these newly empowered white southern politicians passed black codes, voter qualifications, and other anti-progressive legislation to reverse the rights that blacks had gained during Radical Reconstruction. The U.S. Supreme Court bolstered this anti-progressive movement federalism  with decisions in the Slaughterhouse Cases, the Civil Rights Cases, and United States v.

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Answer:

Electric force is a phenomenon which is experienced by a point charge due to its presence in an electric field. Electric force fields indicate the strength of the electric force that will be experienced, and also the direction of the force. The strength is shown by the closeness of the electric field lines and the direction is shown by the direction of the lines. Therefore, force fields are necessary in describing electric force.

Explanation:

Electric force is a phenomenon which is experienced by a point charge due to its presence in an electric field. Electric force fields indicate the strength of the electric force that will be experienced, and also the direction of the force. The strength is shown by the closeness of the electric field lines and the direction is shown by the direction of the lines. Therefore, force fields are necessary in describing electric force.

Answer:

150 miles

Explanation:

just do 50x3

Answer:

150 miles

Explanation:

50 x 3 = 150

Radio sources are harder to find due to the effectively collect and focus the long-wavelength radio waves to achieve better resolution and sensitivity.

Compared to optical telescopes, radio telescopes are built large primarily because radio waves have very long wavelengths. Due to their long wavelengths, radio waves require larger telescopes to effectively collect and focus the incoming signals. This is necessary to achieve a sufficient level of resolution and sensitivity to detect and study radio sources, which can sometimes be harder to find than optical sources.
The size of a radio telescope is not mainly because they're less expensive to make than optical telescopes. While it is true that radio telescopes do not require the same level of precision and material quality as optical telescopes, building a large radio telescope can still be quite expensive.
Atmospheric turbulence is more of a problem for optical telescopes, as it can distort the incoming light and reduce the clarity of the observed image.

However, radio telescopes are less affected by atmospheric turbulence because radio waves can generally pass through the atmosphere with less distortion.
Lastly, while radio waves can be absorbed by certain parts of the atmosphere, especially at higher frequencies, this is not the primary reason for building larger radio telescopes.

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The higher level that the electron reached from the ground state is n = 8.

The lowest permitted energy level for hydrogen is the ground state, which also has no angular momentum. A single electron was present in the 1s atomic orbital, making it the most stable state.

The ground state of an atom, molecule, or ion is the lowest permitted energy state according to chemistry and physics. In other words, the most stable arrangement is the ground state.

Wavelength of photon absorbed by ground state H atoms;  λ_g = 92.62 nm = 92.62× 10⁻⁹ m

From Rydberg's formula, we can calculate a higher level of energy,

\(\frac{1}{λ} = R(1/n_1^2-1/n_2^2)\)

Where R =  Rydberg's Constant

R = 1.097 × 10⁷ m⁻¹

So,

1/(92.62 × 10⁻⁹) = 1.097 × 10⁷(1/1² - 1/n₂²)

0.9842 = 1 - 1/n₂²

1/n₂² = 1 - 0.9842

1/n₂² = 0.0158

n₂ = √(1/0.0158)

n₂ ≈ 8

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Answer:

Explanation:

Field characteristics

The strength of the field at the Earth's surface ranges from less than 30 microteslas (0.3 gauss) in an area including most of South America and South Africa to over 60 microteslas (0.6 gauss) around the magnetic poles in northern Canada and south of Australia, and in part of Siberia.

Apply second equation of kinematics

A. Controlled Variable.

I hope this helps!

Photovoltaic cells use solar energy to produce electricity. The correct option is D.

Photovoltaic cells convert sunlight into electrical energy by converting the energy of photons, which are particles of light. The photovoltaic cell works by separating electric charges in a solid state using the photoelectric effect.

The electric field inside the cell causes the separated charges to flow through the circuit, providing electrical power to the load. Silicon is the most widely utilized material for solar cells.

The photovoltaic effect was initially observed by Edmond Becquerel in 1839, and it was first exploited in the 1950s when photovoltaic silicon was made into semiconductors, which was a technology that had already been in use in the semiconductor industry for over a decade.

In conclusion, solar energy is a renewable and clean source of energy that is produced by photovoltaic cells that convert sunlight into electrical energy using the photovoltaic effect.

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The initial velocity and the height of this building are 29 m/s and 780 meters respectively.

In order to calculate the initial velocity, we would apply the second equation of motion:

S = ut - ½at²

200 = u10 - ½(9.8 × 10²)

200 = u10 - 490

u10 = 490 - 200

u10 = 290

u = 290/10

Initial velocity, u = 29 m/s.

Next, we would determine the height of the building:

H = ut + ½at²

H = 29(10) + ½(9.8 × 10²)

H = 290 + 490

Height, H = 780 meters.

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Answer:

A medium is able to transport a wave from one location to another because the particles of the medium are (c)able to interact.

When a wave travels through a medium, it causes the particles in the medium to vibrate, and these vibrations are then passed on to neighboring particles, thus allowing the wave to propagate. In a solid, the particles are tightly packed and can interact strongly, allowing waves to travel quickly.

In liquids and gases, the particles are more spread out, and interactions between them are weaker, so waves travel more slowly.

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The intensity of a laser beam is a measurement of its power per unit area. It is defined as the amount of energy provided by the laser per unit time and laser beam area.

The laser beam intensity is measured in watts per square metre (W/m2). The intensity of a laser beam may be described mathematically as I = P/A where I is the laser beam's intensity in watts per square metre (W/m2), P is the laser beam's power in watts (W), and A is the laser beam's size in square metres (m2). For instance, if a laser beam has a strength of 5 watts and a surface area of 0.001 square metres, then its intensity would be: I = P/A = 5 W / 0.001 m² = 5000 W/m² Therefore, the intensity of the laser beam in this example is 5000 watts per square meter.

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Answer:

kinetic energy equation is 85,714.2857 kg.

Explanation:

Answer:

25 cm³

Explanation:

In the conversion of units, we know that are one cubic centimeters (cm³) in a milliliter (mL) .

1 milliliter = 1 cubic centimeter

25 milliliters = 25 cubic centimeters

Therefore, a volume of 25 milliliters is the same as a volume of 25 cubic centimeters.

This ultimately implies that, the volume of an object in milliliters is equivalent to its volume in cubic centimeters.

The question wants us to drag and drop the words in the boxes to what they represent in the pictures

The chemical solidifies when temperatures are low. It turns into a liquid upon heating before becoming a vapor.

The temperature of water at which all three states coexist is known as the triple point. The temperature at which liquid turns into vapor is known as the boiling point.

Each of the words have been placed appropriately on the image. It shows the states of water. It also tells us what happens to water in the presence and absence of pressure.

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Strange as it may seem, the statement in the question appears to be TRUE.  

-- Before the shot, neither the cannon nor the ball is moving, so their combined momentum is zero.  

-- Since momentum is conserved, we know immediately that their combined momentum AFTER the shot also has to be zero.

-- (20g is rather puny for a "cannonball" ... about the same weight as four nickels. But we'll take your word for it and just do the Math and the Physics.)

-- Momentum = (mass) x (velocity)

After the shot, the momentum of the cannonball is

(0.02 kg) x (100 m/s ==> that way)

Momentum of the ball = 2 kg-m/s ==> that way.

-- In order for both of them to add up to zero, the momentum of the cannon must be (2 kg-m/s this way <==) .

Momentum of cannon = (5 kg) x (V m/s this way <==)

2 kg-m/s this way <== = (5 kg) x (V m/s this way <==)

Divide each side by (5 kg):

V m/s  =  (2/5) m/s this way <==

Speed of recoil of the cannon = -- 0.4 m/s

The old kettle with a power rating of 1.4kw, and the one with a power rating of 2.0kw. With this condition, this will affect the time it takes to boil a fixed volume of water quicker than before.

In electrical engineering and mechanical engineering, the power rating of equipment is the highest power input allowed to flow through particular equipment. According to the particular discipline, the term power may refer to electrical or mechanical power.

How does power rating affect the time it takes to boil a fixed volume of water?

Since, the power rating is higher, logically it has higher power than before. Since it is a fixed volume of water, so the only difference is power rating. With greater power, it will take shorter amount of time to boil the same water by volume.

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Answer:

c

Explanation:

An object's speed is the characteristic which is related to kinetic energy but not the potential energy. Thus, the correct option is C.

The kinetic energy of an object is the energy which it possesses due to the motion of the object. Kinetic energy is defined as the work which is needed to accelerate an object of a given mass from rest position to its stated velocity. Having gained this amount of energy during the acceleration of the object, the object maintains this kinetic energy unless its speed changes or it experiences acceleration.

Kinetic energy is directly proportional to the mass of the object and to the square of the velocity of the object, the expression is:

K.E. = 1/2 m × v²

where, KE = Kinetic energy,

m = mass of the object,

v = velocity of the object.

Therefore, the correct option is C.

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Answer:

Explanation:

The kinetic energy of an object can be found by using the formula

\(k = \frac{1}{2} m {v}^{2} \\ \)

m is the mass

v is the velocity

From the question we have

\(k = \frac{1}{2} \times 1120 \times {40}^{2} \\ = 560 \times 1600\)

We have the final answer as

Hope this helps you

Answer:

Proteins are organic compounds containing nitrogen that are made of long, linked chains of amino acids and are a part of all living organisms.

Answer:

A . Force

C . Velocity .

D . Acceleration .

The magnitude scale in astronomy is logarithmic, which means that for every 1 unit increase in magnitude, the brightness decreases by a factor of approximately 2.512 (approximately 2.5).

Given that the +6.0 magnitude star appears 2.5 times brighter than the +3.0 magnitude star, we can calculate the difference in magnitudes between them:
Magnitude difference = 6.0 - 3.0 = 3.0
Since each magnitude unit represents a factor of 2.512 change in brightness, the ratio of the brightness between the two stars can be determined as:

Brightness ratio = 2.512^(magnitude difference) = 2.512^3.0 ≈ 15.85
Therefore, the +6.0 magnitude star is approximately 15.85 times brighter than the +3.0 magnitude star.

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The slope of the line in the velocity versus time plot is equal to the acceleration of the object.

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Answer:

t = 0 1.697 seconds

Explanation:

Comment

This is a standard question where the time is the same for both the vertical distance the ball has to drop and the time it takes to go horizontally.

Formulas

dv = vi*t + 1/2 a t^2

dv is the vertical distance that the ball has to travel in a downward direction

dh = vh * t

Givens

a = 9.81

dv = 1.44

vi = 0

t = ?

dh = 2 m

t = same as above (but not given)

Solution

dv = 1/2 a * t^2

1.44 = 1/2 * 9.81 *t^2                 Multiply by 2

2*1.44 = 1/2 * 2 * t^2

2.88 = t^2

t = 1.697 seconds

Note that you do not have to use the horizontal information to get the time. You only have to realize that the ball has no vertical velocity to begin with.

Given that

heat capacity of water = 4200

heat capacity of aluminium = 897

heat capacity of oil = 1900

heat capacity of gold = 129

Heat capacity is the amount of heat a material absorbs to increase its temperature by 1 degree Celsius.

So, larger the heat capacity of a material lower will be the temperature change.

If equal amount of energy is applied to the materials, then gold will have the greatest temperature change as its heat capacity is lowest than other materials.

Answer:

384 000 000 en notación científica es 3.84*10⁸

Explanation:

La notación científica es una forma de representar números para simplificar la forma en que se escriben. Esta notación se utiliza para poder expresar muy fácilmente números muy grandes o muy pequeños.

Los números se escriben como un producto:

a*10ⁿ

donde:  

Para escribir el número 384 000 000 en notación científica, se realizan los siguientes pasos:

Entonces, 384 000 000 en notación científica es 3.84*10⁸