An apple suddenly drops a distance of 3.2 m from a tree. If the acceleration due to gravity is 9.8 m/s2, how long does it take the apple to reach the ground?. Give your answer to two decimal places.

The centripetal acceleration experienced by an object moving in a circle is given by the formula:

a = v²/r

where a is the centripetal acceleration, v is the speed of the object, and r is the radius of the circle.

In this problem, we are given that the object has a mass of 20 g, which we need to convert to kilograms:

m = 20 g = 0.02 kg

We are also given that the object is moving in a horizontal circle of radius 250 cm at a speed of 50 cm/s. We need to convert these measurements to SI units (meters and seconds) to use the formula for centripetal acceleration:

r = 250 cm = 2.5 m

v = 50 cm/s = 0.5 m/s

Now we can calculate the centripetal acceleration:

a = v²/r = (0.5 m/s)² / 2.5 m = 0.1 m/s²

Therefore, the centripetal acceleration experienced by the object is 0.1 m/s².

The frequency of oscillation for the mass-spring system is approximately 0.4982 Hz.

To find the frequency of oscillation for the mass-spring system, we can use the formula:

f = (1 / (2π)) × √(k / m)

Where:

f = Frequency

π ≈ 3.14159

k = Spring constant

m = Mass

First, let's determine the spring constant (k). The spring constant can be calculated using Hooke's Law:

k = mg / Δx

Where:

m = Mass

g = Acceleration due to gravity (approximately 9.8 m/s^2)

Δx = Displacement from the equilibrium position

Given that the mass (m) is 8.0 kg and the spring stretches 55.3 cm (0.553 m) before reaching its equilibrium position, we can substitute the values:

k = (8.0 kg × 9.8 m/s²) / 0.553 m

k = 78.4 N/m

Now, we can find the frequency using the formula:

f = (1 / (2π)) × √(78.4 N/m / 8.0 kg)

f = (1 / (2π)) × √(78.4 N/m / 8.0 kg)

f = (1 / (2π)) × √(9.8 N/kg)

f ≈ (1 / (2π)) × 3.1305 Hz

f ≈ 0.4982 Hz

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Answer:

Beryllium chloride

Explanation:

I hope this helps!

Can I get branliest?!

Answer:

T

Explanation:

true, Mechanical waves are waves that transfer energy through material medium

Answer:

True

Explanation:

Mechanical waves are an oscillation of matter that transfers energy through a medium. The oscillation does not cause movement of the matter. The mechanical wave will travel until all the initial amount of energy is transferred. Sound waves and ocean waves are examples of mechanical waves.

Answer:

It is not a uniform velocity, because his velocity increases for 5 m every second (acceleration = 5m/s2), meaning his velocity always changes.

When he starts at rest, his velocity is 0 m/s. But in 1 second later, his velocity is already 5m/s. At 2 seconds, his velocity will be 10 m/s.

Answer:

drastic assumption that the car moves along the path at the same speed,

hese failures, it would be necessary to take the time of each type of trajectory, accelerated, constant and decelerated, this method is not easy since it implies knowing the distance in each type of movement,

Explanation:

In this exercise Alfredo makes a drastic assumption that the car moves along the path at the same speed, in reality the car when leaving the first traffic light accelerates until it reaches a speed, then remains constant and decelerates to be able to stop at the second traffic light.

To overcome these failures, it would be necessary to take the time of each type of trajectory, accelerated, constant and decelerated, this method is not easy since it implies knowing the distance in each type of movement, another method would be that the two traffic lights were in green so that the vehicle can run with constant speed throughout the trajectory

A storm is most likely approaching if air pressure is dropping quickly. This is due to the fact that storms are regions of low pressure, which causes rising air and condensation, which then causes clouds and precipitation.

An approaching low-pressure system can be identified by a sharp reduction in air pressure. Low pressure denotes a lack of power or pressure that would otherwise drive clouds or storms away. Cloudy, wet, or windy weather is a symptom of low-pressure systems.

The amount of oxygen that can be breathed in reduces as the pressure does. People can get sick and possibly pass away at very high elevations because the oxygen levels and air pressure are so low. As the air pressure rises, the prediction that stands the best chance of coming true is sunny, clear skies are coming.

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Answer:

More carbon dioxide or greenhouse gases in the atmosphere can lead to global warming. Oceans store a large amount of heat, and increases in sea surface temperature can increases the amount of water vapor over the oceans, and that will increases the amount of greenhouse gases.

A photon is a fundamental particle of light and electromagnetic radiation, which is a quantum of electromagnetic energy that behaves like a particle and a wave.

Photons have no mass and no electric charge, they can be absorbed or emitted by matter, and the energy of a photon is directly proportional to its frequency and inversely proportional to its wavelength and they play a vital role in many physical processes, such as the emission and absorption of light, the photoelectric effect, etc., that are important in many areas of modern technology, including solar cells, etc.

Hence, a photon is a fundamental particle of light and electromagnetic radiation.

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The force that causes centripetal acceleration of a car making a turn on a flat road is friction

The centripetal acceleration is required to create a centripetal force. The centripetal force that cause an object to turn in a circular path is due to the force of friction between the tyres and the road. The magnitude of centripetal force is numerically equal to the magnitude of frictional force.

Fc = f

m v² / r = μ N

Fc ∝ 1 / r

The larger the centripetal force the the smaller the radius of curvature.

Therefore, the force that causes centripetal acceleration of a car making a turn on a flat road is friction

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B. An ammeter is connected in series in a circuit and is used to measure the current flowing through that particular part of the circuit. An ammeter has a low resistance, so it does not significantly affect the circuit's current.

The ammeter is connected in series, it becomes a part of the circuit through which the current flows, and the ammeter measures the amount of current flowing through it. Therefore, an ammeter is an essential tool in electrical measurements, especially when trying to troubleshoot and diagnose issues in a circuit.

An ammeter is a measuring instrument that is specifically designed to measure the electric current flowing through a circuit. To accurately measure the current, the ammeter is connected in series with the circuit, meaning it becomes a part of the circuit, and the current flows through the ammeter. This allows the ammeter to measure the current without affecting the overall functioning of the circuit.

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The International Monetary Fund (IMF) was created to promote world trade through monitoring and maintaining fixed exchange rates and by making loans to countries with payments problems.

The International Monetary Fund (IMF) is a major financial agency of the United Nations, and an international financial institution, headquartered in Washington, D.C., consisting of 190 countries. Its stated mission is "working to foster global monetary cooperation, secure financial stability, facilitate international trade, promote high employment and sustainable economic growth, and reduce poverty around the world. It now plays a central role in the management of balance of payments difficulties and international financial crises. Countries contribute funds to a pool through a quota system, from which countries experiencing balance of payments problems can borrow money.

So, The International Monetary Fund (IMF) was created to promote world trade through monitoring and maintaining fixed exchange rates and by making loans to countries with payments problems.

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Answer:

A micrometer caliper.

...............

Answer:

amount of displacement divided by the time the displacement occurs

Explanation:

Best answer of those given

Answer:

1. thermal energy

2. Batteries and coal

4. energy conversion

So if the initial temperature was t1, the final temperature will also be t1.

Temperature is a measure of the average thermal energy of the particles in a system. It is a scalar quantity that reflects the amount of heat energy present in a substance, and it is typically measured in units of degrees Celsius (°C), Kelvin (K), or Fahrenheit (°F). Temperature is related to the kinetic energy of the particles in a system, which is the energy associated with their motion. As the temperature of a system increases, the kinetic energy of its particles also increases, leading to faster and more chaotic motion. Conversely, as the temperature decreases, the kinetic energy of the particles decreases, leading to slower and less chaotic motion.

Here,

In an isothermal expansion, the temperature of the gas remains constant. This means that the final temperature will be the same as the initial temperature.

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Answer:

the correct answer is D

Explanation:

ANSWER

EXPLANATION

Parameters given:

Speed of electron, v = 4.10 * 10^3 m/s

Magnetic field, B = 1.45 T

Magnetic force, F = 1.40 * 10^(-16) N

To find the angle that the velocity of the electron makes with the magnetic field, apply the formula for magnetic force:

where θ = angle

q = electric charge = 1.6 * 10^(-19) C

Make θ the subject of the formula:

Therefore, the angle that the velocity makes is:

To find the second angle, subtract the angle from 180 degrees:

The angles are:

Explanation:

I am going to sign off....here is a possible scenario:

    Current thru 3 ohm = 1.05 Amp V3 = 3.15 V   Current through 4 ohm  = .58 A      through 5 ohm = .464 A    (voltage across these two resistors is 2.32 v )

Answer:

(2) the work required to move the electron is 4.8 x 10⁻¹⁹ J.

Explanation:

Given;

potential difference, V = 3.00 volts

charge of electron, q = 1.6 x 10⁻¹⁹ C

The work required to move an electron is calculated as;

W = Vq

where;

W is the work done in Joules

Substitute the given values and solve for W;

W = (3.00)(1.6 x 10⁻¹⁹)

W = 4.8 x 10⁻¹⁹ J.

Therefore, the work required to move the electron is 4.8 x 10⁻¹⁹ J.

The solution of copper sulfate was too cold

Explanation:

The lack of an observable reaction when adding a zinc strip to a copper sulfate solution could be due to the zinc not being reactive enough, the reaction occurring too slowly, or an experimental error.

The lack of an observable reaction refers to a situation where no visible or measurable change occurs when two or more substances are mixed or brought into contact with each other, even though a reaction was expected based on the chemical properties of the substances involved.

Here in the Question,

The lack of an observable reaction when Alannah added a strip of zinc to a beaker containing a solution of copper sulfate could be due to the following reasons:

Zinc and copper sulfate do not react: It is possible that the zinc strip and copper sulfate solution do not react with each other, leading to no observable change. This could occur if the zinc strip is not reactive enough to displace the copper in the copper sulfate solution.

Reaction is slow: Another possibility is that the reaction between zinc and copper sulfate is occurring but is happening too slowly to be observed. In this case, the reaction rate may be too low to produce an observable amount of solid copper in the beaker in a short period of time.

Experimental error: It is also possible that an error was made during the experiment that prevented the expected reaction from occurring. For example, the concentration of the copper sulfate solution may have been too low, or the zinc strip may have been coated with a layer of oxide that prevented it from reacting with the solution.

Therefore, Zinc may not be sufficiently reactive, the reaction may proceed too slowly, or there may have been a mistake in the experiment if there was no detectable reaction when a zinc strip was added to a copper sulphate solution.

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The best answer ""The planets and sun all formed from a cloud of gas and dust that contracted as it cooled. As the cloud contracted, its spin increased and it flattened. By the time the planets formed, the cloud was a flat spinning disk.""

This explanation is based on the widely accepted theory of solar system formation called the nebular hypothesis. According to this hypothesis, the solar system formed from a rotating cloud of gas and dust known as the solar nebula. As the nebula contracted due to its own gravity, it began to spin faster and flatten into a spinning disk.

Because the initial cloud had a particular rotation and flattened shape, the resulting planetary system inherited these characteristics. The conservation of angular momentum caused the protoplanetary disk to form a nearly flat plane, and the counterclockwise direction of rotation was also preserved. This is why the planets have orbits in the same plane and in the same counterclockwise direction when viewed from above the Earth's North Pole.

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Answer:

Yes it would affect the energy. the one who is smaller would fly

Explanation:

the larger kid is carring all the weight so he would have more energy on his side and the smaller kid would fly bc he lighter and has less energy on his side.

Hope this helps.

Answer:

2300.68

Explanation:

The metal hammer has a mass of 1500 kg and it hits the baseplate

with a speed of 8.0 m/s.

0 Calculate the kinetic energy of the hammer as it hits the baseplate. there for it will create the kinetic energy of 2300.68 as it hits the baseplate.

Answer:A

Explanation:I’m taking the test rn and I got it correct

It is a conductor that allows charge to move freely through it.

Resistivity is a distinctive attribute of any material that may be used to compare different materials based on how well they conduct electric currents. Low conductivity is indicated by high resistance.

The Greek letter rho is frequently used to represent resistance, which is numerically equivalent to the resistance R of a wire-like specimen, multiplied by its cross-sectional area A, and divided by its length.

The ohm is the measurement of resistance. The ratio of area in square meters to length in meters is reduced to merely meters in the metre-kilogram-second (mks) method.

Therefore, It is a conductor that allows charge to move freely through it.

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Answer:

For any given motion, the distance is

Explanation:

Explanation:

Given:

v₀ = 5.0 m/s

a = 2.5 m/s²

Equation:

Δx = v₀ t + ½ at²

Δx = (5.0 m/s) t + ½ (2.5 m/s²) t²

Δx = 5t + 1.25t²

Make a table of data using 1.0 increments for t.

Graph the data.  See included image.

Answer: A

Explanation:

Pulmonary - is lungs

Systemic - is body system