You push a 25.0kg wooden box across a wooden floor at a constant speed of 1.0m/s . the coefficient of kinetic friction is 0.20 . how large is the force that you exert on the box?

Answer:

Heating.

Cooling.

Water Heater.

Lights.

Explanation:

Answer:

400

Explanation:

We divide time (4.5 hours) and speed (1800 miles)

1800÷45=400

First, we need to understand what p (boy) means. In probability, p (boy) represents the probability of selecting a boy from the class.

Now, we know that there are 15 boys in a class of 28 students. So, the probability of selecting a boy is 15/28.

To calculate this in percentage, we can use the formula:

P (boy) = Number of boys / Total number of students x 100

P (boy) = 15 / 28 x 100

P (boy) = 53.57%

Therefore, the probability of Mrs. Avery selecting a boy to read the poem out loud is 53.57%.

In conclusion, the probability of selecting a boy from Mrs. Avery's class to read a poem out loud is 53.57%, based on the given information of there being 15 boys and 13 girls in the class. This probability can also be calculated as 15/28.

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Answer:

1 mm = 0.1 mV; 5 mm = 0.5 mV (or between 2 dark horizontal lines); 10 mm = 1.0 mV. Heart rate ... QRS complex is a series of wave forms following P wave.

Explanation:

Hoped I helped

The frequency of the wave is 2.5 Hz.

The frequency of a wave is defined as the number of complete cycles or oscillations it completes in one second. In this case, we are given the speed of the wave, which is 4.0 m/s, and the distance from a crest to the next trough, which is 1.6 m.

To find the frequency, we can use the formula:

Frequency = Speed / Wavelength

The wavelength is the distance from one crest to the next crest or from one trough to the next trough. Since we are given the distance from a crest to the next trough, we need to double it to get the wavelength. Therefore, the wavelength is 2 * 1.6 m = 3.2 m.

Plugging the values into the formula, we get:

Frequency = 4.0 m/s / 3.2 m = 1.25 Hz.

However, since the frequency represents the number of complete cycles per second, we need to round the answer to the nearest whole number. Therefore, the frequency of the wave is approximately 2.5 Hz.

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Answer:

is the attraction or repulsion between charged particles

The electric force is the attraction or repulsion between charged particles. They are electrostatic force of attraction or electrostatic force of repulsion.

An electric force is generated from the attraction or repulsion between charged particles. There are two kinds of charges, positive charges and negative charges.

Negative charges are produced by electrons whereas, protons are carrying  positive charges. Two positive charges or two negative charges will repel whereas, a positive charge and a negative charge attracts together.

This force of attraction is the basic of chemical bonding. The nucleus of an atom attracts the bonded electrons and this force of attraction results in the combination of two atoms forming compounds.

Thus, the blank space indicates the electric force.

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Answer:

Precision

Explanation:

You can be very precise but inaccurate, as described . You can also be accurate but imprecise. For example, if on average, your measurements for a given substance are close to the known value, but the measurements are far from each other, then you have accuracy without precision. Precision is independent of accuracy. You can be very precise but inaccurate, as described above. You can also be accurate but imprecise. For example, if on average, your measurements for a given substance are close to the known value, but the measurements are far from each other, then you have accuracy without precision. Precision refers to the closeness of two or more measurements to each other. Using the example above, if you weigh a given substance five times, and get 3.2 kg each time, then your measurement is very precise.

The capacitance of the air-filled capacitor is 0.118 πr² meter.

The ideal air-filled parallel-plate capacitor is a simple case of the capacitor. The capacitance of the air-filled capacitor can be determined as

C = ε₀ . A / d

where C is the capacitance of the capacitor, ε₀ is the vacuum permeability (8,85 x 10‾¹² F/m), A is the area of plate (m²) and d is a distance of the plate (m).

From the question above, we know that:

A = 4 x π x r²

C = 300 pF

By substituting the parameter, we get

C = ε₀ . A / d

300 x 10‾¹² = 8,85 x 10‾¹² . 4 x π x r² / d

d = 35.4 x 10‾¹² x π x r² / 300 x 10‾¹²

d = 0.118 πr² meter

where r is radius of plate.

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Answer:

the cart will have an acceleration of 1,25 m.s‐²

Answer:

(x +1), (x -5) and (x +1)

Explanation:

The computation of the factorization is shown below

Data provided in the question

\(X^3 - 3x^2 - 9x - 5\)

Based on the above information, the factors are

Now we have to open these equations in order to get the factors which are as follows

\(= x^3 + x^2 - 4x^2 - 4x - 5x - 5\)

\(= x^2( x + 1) - 4x ( x + 1) - 5(x + 1)\)

\(= (x + 1) (x^2 - 4x - 5)\)

\(= (x + 1)(x^2 -5x + x - 5)\)

So,

= (x + 1) (x - 5) (x + 1)

Therefore the (x +1), (x -5) and (x +1) are the factors of the mention polynomial give in the question

Answer:

no

Explanation:

because there is nothing holding you back

Answer:

C) the air outside your home in July

Explanation:

Answer:

B: Shouting under water in a swimming pool

Explanation:

because it's the only medium size that will be able to sound wherever you're swimming!!!!

Your words from swimming pool will sound faster than others

Answer:

3000N

Explanation:

divided to get answer

the force needed to accelerate the 1000kg car by 3m/s2 is 3000N

It can be done by you only as we can't access those data in documents.

Let me show steps

Answer:

In mathematics, a random walk is a mathematical object, known as a stochastic or random process, that describes a path that consists of a succession of random steps on some mathematical space such as the integers.

Explanation:

Answer:

1)the unit of work is joule. 2)it is derived unit because it is made by two different unit force and displacement .3)

Answer: happy Ramadan

Explanation: thanks

Answer:

The 1 you are on. (2nd one)

Explanation:

The first one its volume=mass/density so wrong.

For the 3rd, you wouldn't be able to get volume in grams.

For the last, chemicals? Also l/w*h?

Create three scripts: 'task1.m' to save variables, 'gcalculate.m' to calculate gravitational acceleration, and 'task3.m' to plot and analyze the variation of g with height for different planets, using stored variables from 'project_1.mat'.

Accomplish the given tasks, you need to create three MATLAB scripts: 'task1.m', 'gcalculate.m', and 'task3.m'.

In 'task1.m', you will define and save the required variables, such as the universal gravitational constant (G), masses, radii, and names of Earth, Moon, Mars, and Jupiter, as well as the heights of different strata of Earth's atmosphere. These values will be stored in the 'project_1.mat' workspace.

In 'gcalculate.m', you will create a function called 'gcalculate' that takes inputs G, M, and d to calculate and return the gravitational acceleration (g) using the given formula. This function will be used in the subsequent tasks.

In 'task2.mlx', you will load the stored variables from 'project_1.mat' and use the 'gcalculate' function in a loop to calculate and display the values of g at the surface of each planet and at different strata of Earth's atmosphere.

The script will also accept user input for the desired planet and distance to calculate and display the corresponding g value.

In 'task3.m', you will load the stored variables and define an implicit function to calculate g with respect to the variable x, representing the distance from the surface of the planet.

You will sample 1000 evenly distributed values for x, calculate the corresponding g values, and plot a graph showing the variation of g with height for different planets. The plot will be properly labeled and saved as 'task3_graph.fig'.

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Telescopes have to have a good motorized drive system to move them quickly and smoothly so that they can continue to point at the object being observed.

Astronomers use a telescope to observe distant things. Curved mirrors are used by the majority of telescopes, including all large telescopes, to collect and concentrate light from the night sky. The original telescopes employed lenses, which were curved pieces of clear glass, to focus light. The ability of an optical telescope to gather light is its most crucial ability. This capability is solely dependent on the telescope's aperture, or the diameter of the clear objective.

The telescope has a motorized drive mechanism that drives it smoothly from east to west at precisely the same rate that Earth is rotating from west to east in order to maintain the telescope's pointing at the object being seen because Earth is revolving.

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Answer:

Our atmosphere is a mixture of gases that surround Earth. It is kept in place by the pull of Earth's gravity. If Earth was a much smaller planet, like Mercury or Pluto, its gravity would be to weak to hold a large atmosphere

Explanation:

When you park your car, turn your front wheels towards the curb.When parking on a hill or incline, it is important to turn your front wheels towards the curb to prevent the car from rolling down the hill in case the brakes fail.

This is known as "curb parking" and is recommended by most driving experts and government agencies. Turning the wheels towards the curb means that if the car starts to roll, it will hit the curb and stop, instead of rolling into traffic or causing an accident. The direction in which you turn the wheels depends on whether you are parking uphill or downhill. When parking uphill, turn the wheels towards the curb and when parking downhill, turn the wheels away from the curb. In addition to turning the wheels, it is also important to engage the parking brake and put the car in gear or park to further prevent any unintended movement of the vehicle.

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Answer: According to http://www.scifun.org, "Bernoulli's Principle says that the pressure decreases inside a stream of flowing air. When the balloon begins to move out of this low pressure stream, the higher pressure of the air in the room pushes it back into the moving stream"

Answer:

The net force is 9.8ms2, but were you given the acceleration?

Answer:

Explanation:

A scalar quantity is a physical quantity that has only one characteristic - a numerical value.

The scalar value can be positive or negative.

Examples of scalar quantities: temperature, mass, volume, time, density.

A vector quantity is a physical quantity that has two characteristics:

1) a numerical value that is always positive (vector modulus);

2) direction.

Examples of vector physical quantities: speed, acceleration, force.