A car pulling out of a gas station accelerates from rest at a constant rate it covers 1200 meters in 30 seconds. What is the rate of acceleration

Answer:

0.280 s

Explanation:

I set it up as 5.22=(55)(0.0266)/x and then solved for x to be 2.80.

The properties that make telescopes with large mirrors more useful than those with small mirrors are:

B) Increased light-gathering power

C) Enhanced ability to detect faint objects

D) Improved image clarity

E) Higher magnification capability

Telescopes with large mirrors have a greater surface area, allowing them to gather more light and improve the brightness of the observed objects. This increased light-gathering power enables them to detect faint objects that would be challenging to observe with smaller mirrors. Additionally, the larger mirror size contributes to improved image clarity and provides the potential for higher magnification, allowing for detailed observations of celestial objects.

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Full Question ;

The properties that make telescopes with large mirrors more useful than those with small mirrors:

A) Higher resolution

B) Increased light-gathering power

C) Enhanced ability to detect faint objects

D) Improved image clarity

E) Higher magnification capability

Please select the applicable choices from the given options.

To examine and characterize matter, employ its physical qualities. Physical characteristics include things like shape, feel, color, smell, melting temperature, boiling point, density, solubility, polarity, and a host of other things.

Any measurable attribute that characterizes the condition of a physical system through its values is referred to as a physical property. The transitions between a system's brief states can be described by changes in physical characteristics of the system.

Measurements are a common nickname for physical characteristics. The properties are not modal. Physical amount refers to that of an identifiable physical characteristic.

Physical characteristics are often divided in intensive and extensive properties. Whereas an extensive property exhibits an additive relationship, an intensive property is independent by the system's size, scope, or the volume of its constituent parts. These categories are typically only relevant when the sample's smaller subgroups do not interact physically or chemically when combined.

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The characteristics of light include the following below:

This is referred to as an electromagnetic radiation which is a part of the electromagnetic spectrum which can be seen by the human eye. It has different colors and is used by organisms in finding the right direction and location of something.

Light has packets of energy called photons which is why it is described as a wave and other properties such as diffraction etc is the reason why it is referred to as a wave which explains its dual nature.

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The calculation shows that there is a 0.2125 second lag between the sound of the drumstick striking the drum and indeed the audio heard by someone 1.6 kilometres distant.

Distance is the length of an object's real route in its entirety. The displacement of an item between two points is defined as the straight path (shortest) travel between all those two places when directed by one position to another. The metre is the SI unit for measuring distance and displacement (m).

Distance = 1.6 km = 1600 m

Speed of sound in air = 340 m/s

As we know, the expression for distance as,

Distance = Speed / Time

To find out the time delay, let us make time as subject.

Time = Speed / Distance = 340/ 1600 = 0.2125 sec

As a result, there is a 0.2125-second delay between the sound of the drumstick striking the wheel and indeed the music heard by someone 1.6 kilometres away.

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The expression 3sinωt + 8cosωt can be written in the form Rsin(ωt + α) as follows:

Rsin(ωt + α) = √(3² + 8²) sin(ωt + α)

In order to express 3sinωt + 8cosωt in the form Rsin(ωt + α), we need to find the values of R and α.

To determine the value of R, we can use the Pythagorean theorem, which states that for any right triangle, the square of the hypotenuse (R in this case) is equal to the sum of the squares of the other two sides (3 and 8 in this case). Therefore, R = √(3² + 8²) = √(9 + 64) = √73.

To find the value of α, we can use the trigonometric identity: cosα = 3/R, which implies α = cos⁻¹(3/R) = cos⁻¹(3/√73).

Now we have the values of R and α, so we can express 3sinωt + 8cosωt as Rsin(ωt + α), which becomes √73 sin(ωt + cos⁻¹(3/√73)).

In summary, the expression 3sinωt + 8cosωt can be written as √73 sin(ωt + cos⁻¹(3/√73)).

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Explanation:

Unplanned maintenance at nuclear plants and lower than average wind speeds mean the country is currently relying on gas-powered stations to generate about half its electricity

The UK depends on power stations due to the more efficiency of energy production in them.

Even though UK has an enough wind supply over each year to meet the electric needs of UK, they still need power stations that use fuel to generate electricity.

This is because of the challenges created in the maintenance and implementation of wind plants in the UK.

The wind turbines have a higher cost for maintenance, compared to that of power stations. The ideal wind sites in the UK are mostly located in remote areas, so that it becomes more difficult for the implementation of wind plants. Also the lower average wind speed causes less production in the electricity through them. As a result, the UK still depends on power stations for the electric needs.

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Answer:

A

Explanation:

A hypothesis is discarded when the results do not work out, and it contradicts.

Answer:

A

Explanation:

The data that contradicts the hypothesis makes more sense or is correct by the conducted experiment

Answer:

The foil makes the microwave spark it can smoke up and catch fie.

Explanation:

-The aluminum foil's sharp edges are what causes the fire, smoke, and sarks.

- Hope This Helps!

-Justin:)

Answer:

itll spark and catch fire

Explanation:

Answer:

10m/s

Explanation:

The work on the spring is equal to its kinetic energy. The energy of 5J with  a mass of 0.10 Kg is associated with a speed of 10 m/s.

Kinetic energy of an object is the energy generated by virtue of its motion. The work done is the rate of its energy gained and both are having the common unit of joule.

Given that, work done on the object is 5 J. The mass of the spring is 0.10 Kg.

It kinetic energy is equivalent to the work done :

Ke = 1/2 m v²

5 J = 1/2 (0.10 Kg ) v²

 v²  =  5 / 0.05 kg = 100

  v = 10 m/s

Therefore, the velocity of the spring after leaving it is 10 m/s.

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For a laminar airflow over flat plates with a constant surface temperature, the curve that best represents how the average heat transfer coefficient declines with plate length increases.

In fluid dynamics, laminar flow is characterized by fluid particles passing each other in layers along straight paths with little to no mixing in between. When the fluid is traveling at moderate speeds, it tends to Laminar flow without lateral mixing, which causes adjacent layers to slip past one another like playing cards. The heat transfer coefficient measures the convective heat transfer between a fluid medium (a fluid) and the surface (a wall) it flows over. The Newton-Richmann relation shows the heat transfer coefficient as a proportionality factor.

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Answer:

17. .343 seconds: 18.a .357: 18.b 64.5N

Explanation:

17. Since there is no friction, we can apply Newton's equation:

We can then use the kinematic equation:

Solve for t:

18.a We can use the friction formula:

Solving for kinetic friction of block mass 7kg:

18.b We should add all forces that will counteract the rightward acceleration.

Use Newton's equation:

Solve for \(F_{x}\)

\(F_{a} +F_{fr} =F_{x}\)

\(23.75N+40.75N=F_{x} =64.5N\)

For working 15 minute, the energy used by the drill is 2484 KJ.

The rate at which electrical energy is carried over an electric circuit is known as electric power. The watt, or one joule per second, is the SI unit of power. Watts are subject to the same standard prefixes as other SI units: kilowatts, megawatts, and gigawatts are used.

Electric power of the circuit is = 230 × 12 Watt = 2760 Watt.

For working 15 minute, the energy used by the drill is = 2760 × 15 × 60 joule

= 2484 KJ.

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Answer:

The coin was at rest until the card was removed, so it tended to remain in the same location. Once the card was gone, the unbalanced force of gravity caused the coin to fall.

I hope this helped!+*♡

To transition of the satellite from a circular orbit with radius R to an elliptical orbit with rmin = R and rmax = 2R, the velocity v must be increased by a factor of 2.

In a circular orbit, the centripetal force required to keep the satellite in orbit is provided by the gravitational force between the satellite and the Earth.

Fcircular = Fgravity

The centripetal force in a circular orbit can be expressed as:

Fcircular = (mv²) / R

where m is the mass of the satellite, v is the velocity, and R is the radius of the circular orbit.

The gravitational force between the satellite and the Earth can be expressed using Newton's law of universal gravitation:

Fgravity = (G × m × M) / R²

where G is the gravitational constant and M is the mass of the Earth.

Equating the centripetal force and the gravitational force, we get:

(mv²) / R = (G × m × M) / R²

Canceling the mass (m) on both sides of the equation, we have:

v² / R = (G × M) / R²

Rearranging the equation to solve for v, we get:

v = √((G × M) / R)

Now, let's consider the elliptical orbit. The minimum radius (rmin) is R and the maximum radius (rmax) is 2R.

The velocity in the elliptical orbit at rmin can be calculated using the same equation as before:

vmin = √((G × M) / rmin)

Similarly, the velocity in the elliptical orbit at rmax can be calculated:

vmax = √((G × M) / rmax)

Now, we need to find the ratio of vmax to vmin:

vmax / vmin = √((G × M) / rmax) / √((G × M) / rmin)

Simplifying the expression:

vmax / vmin = √(rmin / rmax)

Substituting the given values rmin = R and rmax = 2R:

vmax / vmin = √(R / (2R))

Simplifying further:

vmax / vmin = √(1 / 2)

Taking the square root of 1/2:

vmax / vmin = 1 / √2

Rationalizing the denominator:

vmax / vmin = √2 / 2

Finally, we can see that vmax is twice vmin:

vmax = 2 × vmin

Therefore, to transition from a circular orbit of radius R to an elliptical orbit with rmin = R and rmax = 2R, the velocity v must be increased by a factor of 2.

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1.30 increases the force you exert on the rope to cause the speed to increase by a factor of 1.70.

What is force?

Force is a push or pull upon an object resulting from the object's interaction with another object. Every force has both magnitude and direction, making it a vector quantity. It is measured in the SI unit of newtons and represented by the symbol F.

The relationship between the force applied to a rope, its mass, and the resulting acceleration is described by Newton's second law of motion.

F = m * a.

If we have an initial force F1 that causes an object of mass m to have an initial acceleration a1, and we increase the force to F2, the new acceleration will be a2. We can use this equation to find the factor by which we need to increase the force in order to cause the speed to increase by a factor of 1.70.

F2 = m * a2

F2 = m * a1 * √(1.70)

F2 = F1 * √(1.70)

So, to increase the speed by a factor of 1.70, you must increase the force you exert on the rope by the square root of 1.70, or about 1.30.

Therefore, 1.30 increases the force you exert on the rope.

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The observed frequency will be greater than the source’s frequency (option - A) is correct answer.

If the source and observer are moving simultaneously in either case—moving observer or moving source—you'll notice that the frequency increases. The frequency decreases if they are drifting apart. Whether the source is moving or the observer is moving will affect how much the frequency changes.

Although the waves move at the same speed, the frequency that is observed is affected by any relative movement between the source and the observer. The wavelength changes along with the observed frequency. When an observer and a source are moving in the same direction, the frequency rises and the wavelength falls.

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Answer:

Explanation:

A simple pendulum consists of a mass (usually represented as a small object or bob) attached to a string or rod of negligible mass. The mass is free to swing back and forth under the influence of gravity.

In the figure, the point of suspension is denoted by "O," and the mass (bob) is represented by the small circle. The string or rod is represented by the vertical line connecting the point of suspension to the bob.

Amplitude:

The amplitude of a pendulum refers to the maximum displacement or swing of the bob from its equilibrium position. In the figure, the amplitude can be represented by the angle formed between the vertical position and the position of the bob when it swings to its maximum distance on one side. It is usually denoted by the symbol "A."

Effective Length:

The effective length of a pendulum refers to the distance from the point of suspension to the center of mass of the bob. It represents the distance over which the mass swings back and forth. In the figure, the effective length can be measured as the length of the string or rod from the point of suspension to the center of the bob. It is usually denoted by the symbol "L."

It is important to note that the amplitude and effective length of a simple pendulum affect its period of oscillation (the time taken for one complete swing). The relationship between these parameters and the period can be described by mathematical formulas.

Overall, the simple pendulum is a fundamental concept in physics and provides a simplified model for understanding oscillatory motion and the principles of periodic motion.

The box travels 3.33 meters up the ramp with no friction and 1.56 meters with friction.

Frictionless ramp:

K_i = (1/2)mv_i^2 = (1/2)(2 kg)(10 m/s)^2 = 100 J

K_f = 0

U_f = mgh

Since energy is conserved, we have:

K_i = U_f

(1/2)mv_i^2 = mgh

h = (1/2)(v_i^2)/g * sin^2(theta) = (1/2)(10 m/s)^2 / (9.81 m/s^2) * sin^2(37 degrees) = 3.33 m

f_friction = μ_k * f_norm

W_friction = f_friction * d = μ_k * f_norm * d

K_i = U_f + W_friction

(1/2)mv_i^2 = mgh + μ_k * f_norm * d

d = (v_i^2 - 2gh)/(2μ_kf_norm) = ((10 m/s)^2 - 2*(9.81 m/s^2)sin(37 degrees)(3.33 m))/(20.22 kg*cos(37 degrees)*9.81 m/s^2) = 1.56 m

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The statement that best describes what it means to compete is following the rules, understanding the process of sports, respecting competitors.

Competition is the act of battling or being in a rivalry with another for the same thing, position, or reward.

Sport is a competitive activity where contestants or participants contend for the same reward.

However, the participants in a competition must do the following:

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Answer:

Yes

Explanation:

Displacement is equal to the final position of X minus the initial position of X.

Lungs is what helps u breath

Answer:

i think the answer is :lungs

The correct answer is B. According to Newton's law of universal gravitation, the gravitational force between two objects is directly proportional to the product of their masses and inversely proportional to the square of the distance between their centers.

In simpler terms, as objects get closer together, the gravitational force between them increases.

When the distance between two objects decreases, the denominator of the equation (distance squared) becomes smaller, resulting in a larger force. Conversely, when the distance increases, the denominator becomes larger, resulting in a smaller force.

It is important to note that the mass of an object does not directly affect the strength of the gravitational force between two objects. However, a higher mass will lead to a greater gravitational force when compared to a lower mass, but only because the force is being exerted on a more massive object. The mass of an individual object doesn't directly affect the gravitational force it experiences from another object. option B

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Answer:

the one going faster would prolly stop and the one it hit would start rolling the opposite direction it was. like think about if u were playing pool.

Explanation:

The density of the solid is 4.3 g/cm^3

Density is the measure of how much mass an object has per unit volume. To find the density of the given solid, we need to divide its mass by its volume. The volume of the solid is calculated by multiplying its height, width, and thickness. Therefore, the volume of the solid is 5cm x 3cm x 2cm = 30 cm^3.

Now, to find the density of the solid, we divide its mass by its volume. Therefore, the density of the solid is 129g / 30cm^3 = 4.3 g/cm^3. This means that for every cubic centimeter of the solid, it has a mass of 4.3 grams.

This which means that it is a relatively dense object, and it has a significant amount of mass packed into a small volume.

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Answer:

The correct answer is B. Algae and fungi are biotic; temperature and rainfall are abiotic.. FURTHER EXPLANATION. An ecosystem consists of all living and non-living factors in an environment that interact and that are interdependent with each other.. All living things or factors in an ecosystem are called biotic factors.Examples include organisms like plants, animals, humans, etc.

Explanation: