Shayla was late for school. She ran the last half mile in 4 minutes. What was her average speed in miles per hour?

Earths surface gravity: 9.7

Venus surface gravity: 8.8

Mercury's surface gravity:  3.7

Your answer would be D: Earth, Venus, Mercury

Hope this helps! (:

Answer:

6-16km

Explanation:

I think this is the answer.i hope this helps you out! ☺️

Answer:All planets move in elliptical orbits, with the sun at one focus. This is one of Kepler's laws. The elliptical shape of the orbit is a result of the inverse square force of gravity. The eccentricity of the ellipse is greatly exaggerated here.

so it is true

Explanation:

Answer:

True

Explanation:

You can't actually see the orbits or paths of the planets revolving around the sun.

Answer:

The source of electrical current

Explanation:

i got it right

It presents the electrical current source.

Air capacitors are those capacitors that use air as their dielectric. The simplest air capacitors should be comprised of two conductive plates separated by an air gap. So when there is the source of electrical current so it present the electrical capacitor.

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Answer: Vector quantity is a measurement that has both magnitude and direction.

Explanation:

Vector quantity is a measurement that has both magnitude and direction. Examples are force, acceleration, displacement and velocity.

Answer: the other guy does not know anything about science! he is incorrect, the answers are past for the first blank and light for the second blank. depending on what planet in space you take pictures on, and how far away they are, and their orbit, it is past and light. because it takes time for light to reach earth depending on the planet's orbit, and how far away it is.

so the correct answers are: past, and light.

The circuit breaker should be connected in series to the circuit that it is protecting it.

The circuit breaker is a device that helps to protect the circuit. In case of emergency the circuit breaker cuts off any live wiring in the circuit. This process will only be possible if the circuit is connected in series to the circuit.

In series circuit connection, current flowing in the circuit is the same. When the circuit breaker cuts off, all the current flowing in the circuit breaks.

Thus, the circuit breaker should be connected in series to the circuit that it is protecting it.

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Answer:

Because of the time, the breeze is blowing cold towards the ocean. It has to do with wind drafts.

Sea breeze come from ocean to land area. Hence, travelling against  sea breeze, you get direction of the coast.

Any wind that flows from a big body of water onto a landmass is called a sea breeze. Sea breezes form as a result of changes in air pressure brought on by the different heat capacities of water and dry land.

Sea breezes are therefore more confined than prevailing winds. A sea wind is frequently seen along coasts after sunrise because land warms up far more quickly than water does when exposed to solar radiation.  After sunset, a sea breeze diminishes and the wind shifts to flowing from the land towards the sea.

During afternoon ( 4.00 PM),  sea breeze come from ocean to land area. Hence, travelling against  this breeze, you get direction of the coast.

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Answer:

Speed of the sound in air is 325 m/s

Explanation:

As we know that the frequency of the sound is given as

[tex]f = 25000 Hz[/tex]

wavelength of the sound is given as

[tex]\lambda = 0.013 m[/tex]

now we have

[tex]v = \lambda f[/tex]

so we have

[tex]v = (0.013)(25000)[/tex]

[tex]v = 325 m/s[/tex]

Final answer:

The speed of the sound produced by a dog whistle with a frequency of 25,000 Hz and a wavelength of 0.013m is 325 m/s.

Explanation:

The speed of a sound wave can be calculated using the relationship speed = frequency times wavelength. Given a whistle that produces a sound with a frequency of 25,000 Hz and a wavelength of 0.013m, we can find the speed of this sound wave in air. By multiplying the frequency by the wavelength, 25,000 Hz  imes 0.013m, we get 325 m/s. Therefore, the speed of the sound produced by the whistle is 325 m/s.

Answer: D

4cm

Explanation:

Any magnet is strongest for attracting other objects at close range. However, the strongest point of attraction depends on the magnetic pole position which is at a point inside the magnet.

Answer:Most treadmills and stationary bikes use electricity, but what if you could produce electricity while exercising? With a pedal-power generator, you can! And you can use the electricity immediately to power a television, computer, stereo or other electronics — or store it in batteries to use it later.

Explanation:

Answer:

the ball floats away far out into the space and it goes at a fast motion because no friction can stop it if it's doesn't bump into anything

Answer:

16

Explanation:

The formula for the force of attraction between two charges is [tex]\frac{k\cdot q_1q_2}{r^2}[/tex], where k is a constant, [tex]q_1[/tex] is the first charge, and [tex]q_2[/tex] is the second charge. As you can see, if the radius or distance increases by 2, the force decreases by 4 because it grows exponentially. However, if the charge of one of the particles increases by 2, the force between the two also increases by 2. Therefore, the new force will be 8*2=16. Hope this helps!

The new force of attraction between the two objects is;

F_new = 2F

The formula for force of attraction between two objects is;

F = kq1•q2/r²

Where;

k is coulombs constant

q1 is charge of first object

q2 is charge of second object

r is distance between both objects

Now we are told that the charge of one of the two object doubles and the distance between them remains the same.

This means q1 is now 2q1.

Thus;

F_new = k(2q1) × q2/r²

>> F_new = 2(kq1•q2/r²)

Thus, new force of attraction between both objects will be twice the initial force of attraction which is 2F.

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velocity describes speed with direction.

The difference between speed and velocity is that velocity describes the speed with direction. Hence, option A is correct.

Despite their similarities, speed and velocity have quite different meanings, just as distance and displacement do. Speed, which is a scalar quantity, is the "speed at which an object is moving." The rate at which an object travels a distance can be thought of as its speed.

A fast-moving object travels at a high speed and completes a significant distance in a brief period. This is in contrast to an object traveling slowly, which travels a relatively short distance in the same length of time. Zero speed refers to an object that is not moving at all.

One side velocity is vector and speed is scalar other side.

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Answer: The design lacks to control group

Explanation:

Answer:The design lacks a control group

Explanation:

edg

Answer:

the total momentum of the two objects before the collision is equal to the total momentum of the two objects after the collision.

Explanation:

Answer:

Potential energy decreases because temperature is measured by the how fast molecules move. The more kinetic energy in the molecules, the less potential energy

Answer:

2Hz

Explanation:

Hope this helps

Answer: 62 gram

Explanation:

Using attached solubility graph

This solubility graph tells us the amount of potassium nitrate that can be dissolved per 100g of water in order to have a saturated solution of potassium nitrate at a given temperature.

In order to find the solubility of the salt at 40∘C, start from the 40∘C mark on the graph and move up until you intersect the curve. At the point of intersection, move left until you intersect the y axis and read off the value that you land on.

In this case, you can estimate that the solubility of potassium nitrate in water at 40∘C is equal to about 62g

This tells you that a saturated solution of potassium nitrate will hold about 62 g of dissolved salt, i.e. of dissociated salt, per 100g of water at 40∘C.

Please find the attached file for the graph.

Answer:

Maximum force on the charge is 240 N

Explanation:

We have given charge q = 2C

Speed of the charge v = 15 m/sec

Magnetic field B = 8 T

It is known that magnetic force on the moving charge is given by

[tex]F=qvBsin\Theta[/tex]

Maximum force will be equal to

[tex]F=qvB[/tex]

[tex]F=2\times 15\times 8=240N[/tex]

Therefore maximum force on the charge is 240 N

Final answer:

The maximum force experienced by a 2 C charge moving at 15 m/s in an 8 T magnetic field is 240 N, assuming the charge moves perpendicular to the magnetic field.

Explanation:

The maximum force experienced by a 2 C charge moving at 15 m/s in a magnetic field of 8 T can be calculated using the formula F = qvB sin θ, where q is the charge, v is the velocity, B is the magnetic field strength, and θ is the angle between the velocity and the magnetic field. Assuming the maximum force occurs when the charge moves perpendicular to the magnetic field (θ = 90 degrees), the sine of 90 degrees is 1, simplifying our calculation to F = qvB. Thus, the maximum force is F = (2 C)(15 m/s)(8 T) = 240 N.

Answer:

C. Rub two things together.

Explanation:

Rubbing two things together causes friction which forms energy and there you have it, static electricity. Take a fuzzy sweater and rub it against another fuzzy sweater and then touch it. The energy stored will release in the form of shock.

Answer:

Heating a substance causes molecules to speed up and spread slightly further apart, occupying a larger volume that results in a decrease in density. ... Hot water is less dense and will float on room-temperature water. Cold water is more dense and will sink in room-temperature water.

Explanation:

Temperature influences a material's density by altering its particles' arrangement; generally, substances expand and become less dense at higher temperatures.

Temperature affects the density of a material due to changes in its molecular structure and particle motion. When a material is heated, its particles gain energy and move more vigorously, causing them to expand and increase the volume they occupy. If the mass remains constant while the volume increases, the density decreases.

This phenomenon is observed in most substances, especially gases and liquids. In contrast, some materials exhibit unusual behavior. For instance, water reaches its maximum density at approximately 4 degrees Celsius before expanding as it freezes into ice. This behavior is essential for aquatic life during winter as it prevents lakes and rivers from freezing entirely, maintaining a liquid layer on the surface. Overall, temperature-induced changes in particle arrangement and motion play a significant role in altering a material's density, impacting various natural processes and industrial applications.

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Answer:

waning gibbious

Explanation:

Answer:

Explanation:

Given that,

Amount of energy consumed by a 60W light bulb for 1 minutes

P = 60 W

t = 1 mins = 60seconds

This energy can be used to lift a body that weight 10N

W = 10N

This shows that the electrical energy is converted to potential energy

Let calculate the electrical energy

Power is the rate of doing work

Power = Work / time

Therefore, work = power × time

Work = 60 × 60

Work = 3600 J

Potential energy can be calculated using

P.E = mgh

Where, weight is

W = mg

Then, P.E = W•h

P.E = 10•h

Then,

Potential energy, = Electrical energy

P.E = Work

10•h = 3600

Divide both sides by 10

h = 3600 / 10

h = 360m

So, the object will be lifted to a height of 360m

Answer:

360. m

Explanation:

Final answer:

The question involves analyzing a position vs. time graph to determine the object's starting position at 3 meters and its velocity, which is calculated as 3 m/s based on the slope of the line.

Explanation:

The question pertains to analyzing a position vs. time graph of an object in motion to determine its starting position, velocity, and other characteristics of its motion. Given the description of a graph where a straight blue line runs with an upward slope from 0 seconds at 3 meters to 4 seconds at 15 meters, we can infer several key details about the object's movement.

The starting position of this object is 3 meters. This is inferred from the graph's indication that at 0 seconds, the object is at 3 meters.

The object is traveling at a velocity calculated from the slope of the line on the position vs. time graph. The velocity can be found using the formula velocity = (final position - initial position) / (final time - initial time). Substituting the given values, velocity = (15 meters - 3 meters) / (4 seconds - 0 seconds) = 12 meters / 4 seconds = 3 m/s.

This scenario highlights the concepts of initial position, velocity, and the relationship between slope on a position vs. time graph and the velocity of an object in motion.

the instantaneous speed at 2 seconds is **0 m/s** since the position remains constant, and the average speed over the entire trip is **1 m/s** based on the information provided by the position-time graph.

To determine the instantaneous speed at 2 seconds and the average speed over the entire trip from the given position-time graph with three straight segments, we can analyze the information provided. Here's how we can approach this:

1. **Instantaneous Speed at 2 Seconds**:

- Since the graph provides position values at specific time points, we can find the instantaneous speed at 2 seconds by looking at the slope of the graph at that point.

- At 2 seconds, the position is not explicitly given. We can infer it based on the straight segments. The position remains constant at 12 meters from 4 seconds to 6 seconds.

- Therefore, at 2 seconds, the position is 12 meters. To find the instantaneous speed, we need to calculate the slope of the line connecting the points at 2 seconds and a nearby point, which is 4 seconds.

- The change in position is 12 meters - 12 meters = 0 meters (since the position remains constant), and the change in time is 4 seconds - 2 seconds = 2 seconds.

- As a result, the instantaneous speed at 2 seconds is 0 meters per 2 seconds = **0 m/s**.

2. **Average Speed over the Entire Trip**:

- The average speed over the entire trip can be calculated by dividing the total distance traveled by the total time taken.

- The object travels from 0 meters to 12 meters (12 meters) and then back to 0 meters (12 meters total distance). The total time taken is 12 seconds (0 to 12 seconds).

- Therefore, the average speed over the entire trip is 12 meters / 12 seconds = **1 m/s**.

In summary, the instantaneous speed at 2 seconds is **0 m/s** since the position remains constant, and the average speed over the entire trip is **1 m/s** based on the information provided by the position-time graph.

The probable question maybe:

A graph titled Position versus time for with horizontal axis time (seconds) and vertical axis position (meters). The line runs in 3 straight segments from 0 seconds 0 meters to 4 seconds 12 meters to 6 seconds 12 meters to 12 seconds 0 meters.

Use the graph to determine the instantaneous speed at 2 seconds.

m/s

What is the average speed over the entire trip?

Answer:

true

Explanation:

Answer: true

Explanation:

Answer:

I think that's more of an opinion

Final answer:

The net force of Samantha and Emily's efforts is 20 newtons.

Explanation:

The net force of Samantha and Emily's efforts is 20 newtons. When two forces are applied in the same direction, their magnitudes can be added to find the net force. In this case, Samantha and Emily are both applying a force of 10 newtons, so the total force is 10 newtons + 10 newtons = 20 newtons.