which of the following best explains the result of the potential difference that the student found in the second demonstration, where the ball moved along the three-segment path, and how it compared to the first demonstration, where the ball moved vertically?

The mass M of the star is mathematically given as

M=24.269kg

Question Parameters

Orbital period P= 14.3*24*60*60 s

P= 1235520s

Speed V=160000

Generally, the equation for the Radius is  mathematically given as

R =\(\frac{ V*t}{ 2*pi}\)

Therefore

R =\(\frac{ ( 160000 )*(1235520 s)}{ 2*3.142}\)

R=\(3.14581795*10^{10}\)

Where

M*v^2/R = GM^2/(2R)^2

Therefore

M=\(=4(v^2)R/G\\\\ =4(240^2)R/G\\\\ = \frac{4*(160000)^2)*3.14581795*10^{10}}{6.67*10^{-11}}\)

M=4.82956159*10^{31}kg

Considering, that the mass of our Sun is 1.99*10^{30} kg.

The mass M of the star is

M\(=\frac{4.82956159*10^{31}}{1.99*10^{30}}\)

M=24.269

In conclusion, the mass M of the star is

M=24.269

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Answer:

Example

Write 81 900 000 000 000 in standard form: 81 900 000 000 000 = 8.19 × 1013

It’s 1013 because the decimal point has been moved 13 places to the left to get the number to be 8.19

Answer:

F = 1200 [N]

Explanation:

Torque is defined as the product of force by Radius.

\(T=F*r\)

where:

T = torque = 300 [N*m]

r = radius = 50/2 = 25 [cm] = 0.25 [m]

\(F=T/r\\F = 300/0.25\\F = 1200 [N]\)

Answer:

a i believe

Explanation:

Answer:

is suppoesd to say after 20 yrs

Explanation:

Answer:

Yellow

Explanation:

So while red, green and blue light shine upon the shirt, only red and green light will reflect from it. Red and green light striking your eye always gives the appearance of yellow; for this reason, the shirt will appear yellow.

Answer:

6.03 m/s

Explanation:

Average speed = total distance traveled/total time taken

7 = 450 + 100/total time

total time = 550/7 = 78.57 s

Speed of camel on the bicycle = distance/time

25 = 100/time

time = 100/25 = 4 s

Total time = 78.57 s

Time spent riding bicycle = 4 s

Time spent walking = total time - time spent riding bicycle

                                  = 78.57 - 4 = 74.57 s

Speed of walking = distance walked/time spent walking

                             = 450/74.57

                                 = 6.03 m/s

We want to find how far was the slingshot stretched. We will see that it was stretched 10 centimeters approx.

Remember that for a spring of constant K, the elastic potential energy is given by:

\(P = \frac{1}{2}K*X^2\)

Where X is how far the spring is stretched.

Now, we can think of a slingshot as a spring, we know that the constant is:

And that the elastic potential energy is:

Now we can just replace these two in the above equation to find the value of X:

\(P = \frac{1}{2}K*X^2\\\\X = \sqrt{2*P/K} = \sqrt{2*(1.4*10^2 Nm)/(3.0* 10^4 N/m)} = 0.1 m\)

So the slingshot was stretched 10cm approx.

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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:

You are right correct option is D.

Answer:

constant speed

Explanation:

this is because it does not increase nor decrease

Answer:

10 m^3 /s

Explanation:

1 m  X  2 m  X  5 m /s = 10 m^3/s

Equation that describes the motion of the bobber, where the high point corresponds to the time t y = 1.5 sin(2πt/3).

The motion of the bobber can be described by a sinusoidal function, with the high point corresponding to the time t. The amplitude of the oscillations is 1.5 inches, and the period of the oscillations is 3 seconds. Therefore, the equation that describes the motion of the bobber can be written as: y = 1.5 sin(2πt/3)In this equation, y represents the displacement of the bobber from its equilibrium position, and t represents time. The displacement is measured in inches and the time is measured in seconds. This equation describes the bobber's motion as it oscillates back and forth in simple harmonic motion, with the high point corresponding to the time t. The bobber reaches its maximum displacement of 1.5 inches from its equilibrium position at t = 0, 3, 6, etc. and reaches its minimum displacement at t = 1.5, 4.5, 7.5, etc. The bobber returns to its high point at t = 3, 6, 9, etc.

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Answer:

59F

Explanation:

Given parameters:

Temperature in °C  = 15°C

Unknown:

Temperature in Fahrenheit scale  = ?

Solution:

To solve this, we use the conversion equation below;

       F  = (C x 1.8)  + 32

C is the temperature in celcius;

    F = (15 x 1.8) + 32  = 59F

Answer:

power=400Watt

Explanation:

work done =12kJ=12×10³=12000j

time taken=30s

power=?

as we know that

power=work done/time taken

power=12000J/30s

power=400Watt

i hope this will help you :)

Answer:

6.34 m/s

Explanation:

Given that,

A basketball player leave the ground to rise 2.05 m above the floor  in an attempt to get the ball.

We need to find the velocity must a basketball player leave the ground. Using equation of kinematics as follows :

\(v^2-u^2=2ah\)

As it leaves the ground, its final velocity, v = 0

a = -g (opposite to gravity)

\(-u^2=-2gs\\\\u^2=2\times 9.8\times 2.05\\\\u=6.338\ m/s\)

or

u = +6.34 m/s

Given:

The short side of rectangle is: S = 10.396 cm

The long side of rectangle is: L = 16.47 cm

The current in the rectangular loop is: I = 121.164 A

The current in the straight wire is: i = 53.779 A

The distance between the straight wire and the shortest side parallel to the wire is: R = 24.226 cm

To find:

Answer:

La materia es la sustancia de la que está hecho todo material. En física, el sistema es una de las propiedades de la materia. Se puede transferir entre objetos y convertir en forma. No se puede crear ni destruir.

espero que te ayude!

You are able to perceive it as a single strand because of the principle of : Good continuation

Principle of Good continuation states that objects with very smooth edges are easily seen as been continuous ( i.e as a single strand ) rather than objects or materials with rough edges.

The rope coiled on a beach has very smooth edges therefore can be seen as a continuous strand and this is possible due to the principle of good continuation.

Hence we can conclude that You are able to perceive it as a single strand because of the principle of : Good continuation.

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The heat conducted through the glass is 11,812.5 W.

On either side of a pane of window glass, temperatures are 15°C and -2°C. How fast is heat conducted through such a pane of area 0.25 m2 if the thickness is 2 mm? (Conductivity of glass = 1.05 W/m.K)

The formula for calculating the heat conducted through a material is as follows:

Q = KAT ΔT/Δx Q is the amount of heat, A is the surface area of the material, ΔT is the temperature gradient across the material, Δx is the thickness of the material, and K is the material's conductivity.

ΔT = 15 - (-2) = 17 K Δx = 2 mm = 0.002 mA = 0.25 m²K = 1.05 W/m.K

Therefore,Q = KAT ΔT/Δx = 1.05 × 0.25 × 17/0.002 = 11,812.5 W

Hence the required answer is given as the heat conducted through the glass is 11,812.5 W.

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If a screw had a circumference of 16mm and a lead of 0.4mm and 15N of force is applied, the force produced would be 0.375N.

The mechanical advantage of a screw is determined by its lead, which is the distance traveled by the screw in one complete rotation. The formula for calculating the force produced by a screw is F = (T * p) / (2πr), where F is the force produced, T is the torque applied, p is the lead of the screw, and r is the radius of the screw.

In this case, the screw has a circumference of 16mm, so its radius is 16mm / 2π = 2.546mm. The lead of the screw is given as 0.4mm, and the force applied is 15N. Substituting these values into the formula, we get:

F = (T * p) / (2πr)

  = (15N * 0.4mm) / (2π * 2.546mm)

  = 0.375N

As a result, the screw produces 0.375N of force. This means that for every 15N of force applied to the screw, it produces a mechanical advantage of 0.375N, which is a measure of the force amplification achieved by the screw.

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Answer:

D-A radiator emitting warm air and drawing in cool air

Explanation:

1. The power radiated away by Stuart is 191 W.

2. The radiative power absorbed by Stuart's body is 461 W.

3. The final temperature of Stuart's body will be approximately 54.4 °C.

1. The power radiated away by Stuart can be calculated using the Stefan-Boltzmann law:

Power radiated = emissivity * Stefan-Boltzmann constant * (surface area) * (temperature of body)⁴

Substituting the given values, we have:

Power radiated = 0.96 * (5.67 x 10⁻⁸ W/(m² K⁴)) * (0.4 m²) * (306 K)⁴

≈ 191 W

This calculation represents the power radiated away by Stuart's body due to its own temperature.

2. The radiative power absorbed by Stuart's body can be calculated by multiplying the incident solar radiation power per unit area by the exposed surface area and the emissivity:

Power absorbed = incident solar radiation * (exposed surface area) * emissivity

Given that only Stuart's top-half is exposed to the sun, the incident solar radiation is assumed to be 1200 W/m²:

Power absorbed = 1200 W/m² * (0.5 * 0.4 m²) * 0.96 ≈ 461 W

This calculation represents the power absorbed by Stuart's body due to the incident solar radiation.

3. The final temperature of Stuart's body is reached when the rate of heat absorption equals the rate of heat loss through radiation. In other words, when the power absorbed equals the power radiated away.

Setting the absorbed power (461 W) equal to the radiated power (191 W) and solving for the temperature, we can find the equilibrium temperature.

Power absorbed = Power radiated

1200 W/m² * (0.5 * 0.4 m²) * 0.96

= 0.96 * (5.67 x 10⁻⁸ W/(m² K⁴)) * (0.4 m²) * (final temperature)⁴

Simplifying the equation and solving for the final temperature, we find:

(final temperature)⁴ ≈ (1200 W/m² * 0.2 * 0.96) / (0.96 * 5.67 x 10⁻⁸ W/(m² K⁴))

(final temperature)⁴ ≈ 336031.68

Taking the fourth root of both sides, we get:

final temperature ≈ 54.4 °C

This calculation represents the equilibrium temperature that Stuart's body will reach while sunbathing.

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It takes approximately 5.5 hours for light to travel from the Sun to Pluto

The distance from the Sun to Pluto varies depending on the positions of the two objects in their orbits, as both the Sun and Pluto are constantly moving. However, on average, the distance from the Sun to Pluto is about 5.9 billion kilometers or 3.7 billion miles.

The speed of light is approximately 299,792 kilometers per second or 186,282 miles per second.

Using these values, we can calculate that it takes approximately 5.5 hours for light to travel from the Sun to Pluto

5.9 billion km ÷ 299,792 km/s

=> 19710 seconds

=> 5.5 hours.

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The Geiger-Marsden experiment was a series of experiments conducted by Ernest Marsden and Hans Geiger in 1909 that helped to explain the structure of atoms.

The experiment involved firing alpha particles at a thin sheet of gold foil and measuring the angles at which the particles were deflected.

The results of the experiment were unexpected: some of the alpha particles were deflected at large angles, and a few even bounced back in the direction from which they had come. This result could not be explained by the existing Thomson model of the atom, which proposed that atoms were made up of a positively charged "pudding" with negatively charged electrons scattered throughout.

The Bohr-Rutherford model of the atom, proposed by Niels Bohr and Ernest Rutherford, was able to explain the results of the Geiger-Marsden experiment. According to this model, atoms have a small, dense, positively charged nucleus at the center, with negatively charged electrons orbiting around it in specific energy levels.

The deflection of the alpha particles in the Geiger-Marsden experiment could be explained by the presence of the positively charged nucleus, which caused the alpha particles to deflect or bounce back when they came close to it. This led to the development of the modern atomic model, which includes the concept of energy levels and the specific arrangement of electrons within an atom.

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Answer:

It is cause by radiation that's the answer

Explanation: the heat project sun rays towards the popcorn which causes it to pop

The time to fatigue calculated from the given record in Lab data is preferably 60 seconds.

Time to fatigue is the time that is taken for muscle contraction to decrease by 50% of its maximum strength.

Force is the one that is measured by weight here. Here, as time progresses force is seen to come down.

When force is seen to come down, there is a decrease in the number of motor units that get employed as well.

Time to fatigue is the one where this force expressed as weight reaches half of the maximum.

Here, the maximum force expressed as kg is 48kg at 0 sec.

Half of 48kg is 24kg. This is the point where time to fatigue happens with a decreased number of motor units.

Here, we can see that at the 60th second , 50% decay which is 24 kg force happens with the help of only 2 motor units.

Hence, our time to fatigue here is preferably 60 seconds.

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