a car is traveling at 15 m/s on a horizontal road. the brakes are applied and the car skids to a stop in 4.0 s. the coefficient of kinetic friction between the tires and road is

After time 2t, the wheel with constant angular acceleration will have turned through an angle of 100 rad (Option D).

Let's analyze the problem step by step. The given information states that the wheel starts from rest and undergoes a constant angular acceleration. We need to find the angle it will have turned after time 2t.

The formula to calculate the angle turned by a rotating object with constant angular acceleration is given by θ = ω₀t + (1/2)αt², where θ is the angle turned, ω₀ is the initial angular velocity, α is the angular acceleration, and t is the time.

In this case, the wheel starts from rest, so the initial angular velocity ω₀ is 0. The angle turned after time t is given as 25 rad, which means θ = 25 rad, and we need to find the angle turned after time 2t.

Plugging the given values into the formula, we have 25 rad = (1/2)αt². Solving for α, we find α = (50 rad) / t².

Now, we can use this value of α to find the angle turned after time 2t. Plugging α and t into the formula, we get θ = (1/2)(50 rad / t²)(2t)² = 100 rad.

Therefore, after time 2t, the wheel with constant angular acceleration will have turned through an angle of 100 rad (Option D).

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Answer:

The answer is

Explanation:

Using Boyle's law to find the final pressure

That's

\(P_1V_1 = P_2V_2\)

where

P1 is the initial pressure

P2 is the final pressure

V1 is the initial volume

V2 is the final volume

Since we are finding the final pressure

\(P_2 = \frac{P_1V_1}{V_2} \)

From the question

P1 = 115 kPa

V1 = 480 mL

V2 = 650 ml

So we have

\(P_2 = \frac{115000 \times 480}{650} = \frac{55200000}{650} \\ = 84923.076923...\)

We have the final answer as

Hope this helps you

Answer:

2

Explanation:

To find force it's force = mass times acceleration so to find mass you would divide force by acceleration

The period of the vibration is 3.9ms

The period (T) of a vibration is the time to complete one oscillation or revolution and is measured in seconds. The period of vibration is given as

T= 1/F

For example, if the period of a vibration is 0.1 second (one vibration takes 0.1 second), then the frequency of the vibration is 1/0.1=10 vibrations per second or 10 hertz.

Similarly if the frequency of a vibration is 256hz, the period T= 1/F= 1/256=0.0039s

1second= 1×10³ms

therefore 0.0039s = 0.0039×10³= 3.9ms

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To build a model of an ionized atom, you would need to represent the presence of an ion, which is an atom that has gained or lost electrons. Here's how you can do it:

1. Start with a base representing the nucleus of the atom, which consists of protons and neutrons.
2. Choose an element for your model and determine its atomic number (number of protons) and atomic mass (number of protons plus neutrons).
3. For an ionized atom, you need to indicate the gain or loss of electrons. If the ion has gained electrons, add extra negatively charged particles (representing the extra electrons) around the nucleus. If the ion has lost electrons, remove some of the negatively charged particles.
4. Make sure the total number of protons remains the same, as this determines the element.
5. Consider using different colors or symbols to represent the electrons and protons, which will make it easier to distinguish them.

To build a model of a radioactive atom, you would need to represent the presence of unstable atomic nuclei that undergo radioactive decay. Here's how you can do it:

1. Start with a base representing the nucleus of the atom, which consists of protons and neutrons.
2. Choose an element for your model and determine its atomic number (number of protons) and atomic mass (number of protons plus neutrons).
3. Radioactive atoms have unstable nuclei, so you can represent this by showing some of the particles in the nucleus as being "emitting" or "escaping" from the nucleus. This can be done by drawing or attaching small arrows or lines coming out of the nucleus.
4. Additionally, you can represent the emitted particles such as alpha particles, beta particles, or gamma rays by drawing or attaching symbols or labels to these particles.
5. Keep in mind that the total number of protons should remain the same to maintain the identity of the element.

Remember to label and indicate the different parts of your atom model clearly.

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To build an ionized atom model, add or remove electrons to create a net positive or negative charge. To build a radioactive atom model, attach a symbol representing the radioactive decay process.

To build a model of an atom that is ionized, you would need to add or remove electrons from the atom. Ionization occurs when an atom gains or loses electrons, resulting in a net positive or negative charge. For example, if you want to model an ionized sodium atom, you would remove one electron from the outermost energy level. This would leave you with a sodium ion (Na+) that has a net positive charge.

To build a model of an atom that is radioactive, you would need to add a separate component to represent the radioactive decay process. Radioactive decay occurs when the nucleus of an atom spontaneously breaks down, emitting radiation in the process. You can represent this by attaching a small particle or symbol to the atom model to show the emission of radiation. For example, if you want to model a radioactive carbon atom, you can attach a small symbol representing the decay process to the carbon atom.

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Answer:

what scenario i dont understand

Explanation:

step by step explenation

because of the water buddy

Yes - Momentum is a vector quantity because it possesses both magnitude and direction

Answer:

Inches

Explanation:

An inch is a unit of measurement in the Imperial system of measurement. Everything else is used in the International System of Units.

The unit of measure never is used in the International System of Units is inches. The correct option is A.

The International System of Units, abbreviated SI in all languages and sometimes pleonastically as the SI system, is the modern version of the metric system and the world's most widely used measurement system.

The International System of Units (SI), also known as the French Système International d'Unités, is a decimal international system of weights and measures derived from and expanding on the metric system of units.

The 11th General Conference on Weights and Measures adopted it in 1960, and it is abbreviated SI in all languages.

The International System of Units (SI) is a measurement system based on seven basic units: the metre (length), kilogram (mass), second (time), ampere (electric current), kelvin (temperature), mole (quantity), and candela. These base units can be combined with one another.

Thus, the correct option is A.

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Answer:

I may be special but I think 400

Explanation:

Answer:

Distance: 400 m

Displacement: 0 m

Explanation:

Distance: an amount of space between two points

Displacement: the change in position between two distinct points

In a 5.0 L container at 373 K and 203 KPa there is 0.327 mol of a gas sample.

The number of moles of a gas sample in a container can be calculated using the ideal gas law, which is represented by the equation PV = nRT, where P is pressure, V is volume, n is the number of moles, R is the ideal gas constant, and T is temperature.

Given the volume (V) of the container as 5.0 L, the temperature (T) as 373 K, and the pressure (P) as 203 kPa, we can rearrange the ideal gas law equation to solve for the number of moles (n) as follows:
n = PV/RT

Substituting the given values into the equation, we get:

n = (203 kPa)(5.0 L)/ (8.314 L*kPa/K*mol)(373 K)

n = 1015 kPa*L / (8.314 L*kPa/K*mol)(373 K)

n = 0.327 mol

Therefore, the number of moles of the gas sample in the 5.0 L container at 373 K and 203 kPa is 0.327 mol.

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Answer:

Animal Cells

Explanation:

they dont have cell walls because they dont need them. Wall cells are found in plants, which animals dont need.

Answer:

predominantly

Explanation:

they don't have cell walls

Answer:

100m/s

Explanation:

speed of wave=frequency × wave length

=10 × 10

=100m/s

Answer:

100 m/s

Explanation:

Formula :

Solving using the given values :

Answer:

kinetic energy

Explanation:

Motors change electrical energy into kinetic energy. The spinning movement of the motor is used to do work, for example, the wheels on a toy car.

Answer:

hope this works

Explanation:

Kinetic energy is defined as the energy of a moving object.

A thrown football, a speeding automobile, a marathon runner, or a rock falling from a cliff, are examples of objects that have kinetic energy.

Answer:The maximum height you could jump on the moon with a velocity of 3 m/s is 4.5 meters.

Explanation:

To calculate the maximum height that you could jump on the moon, you can use the following formula:h = (v^2) / (2 * g)where h is the maximum height, v is the initial velocity, and g is the acceleration due to gravity. On the moon, g is approximately 1.6 m/s^2. Substituting the values, we get:h = (3^2) / (2 * 1.6) = 4.5 m

So the maximum height you could jump on the moon with a velocity of 3 m/s is 4.5 meters.

To calculate the acceleration of the refrigerator 30 seconds after a person pushes with a force of 400 N, we need to first determine the mass of the refrigerator. Let's assume that the mass of the refrigerator is 50 kg. We can use the formula F = ma, where F is the force applied, m is the mass of the object, and a is the acceleration.

To calculate the acceleration of the refrigerator 30 seconds after a person pushes with a force of 400 N, we need to first determine the mass of the refrigerator. Let's assume that the mass of the refrigerator is 50 kg. We can use the formula F = ma, where F is the force applied, m is the mass of the object, and a is the acceleration.
We know that the force applied is 400 N, so we can plug in the values we have:
400 N = 50 kg x a
Solving for a, we get:
a = 400 N ÷ 50 kg
a = 8 m/s²
This means that 30 seconds after the person pushes the refrigerator with a force of 400 N, the refrigerator will be accelerating at a rate of 8 m/s².
To further explain, acceleration is the rate of change of velocity with respect to time. An object accelerates if it changes its velocity with time. It is measured in meters per second squared (m/s²). The force applied to the object, as well as the mass of the object, determines the acceleration of the object.

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Answer:

The temperature  change in the calorimeter will be lower

Explanation:

Water is an example of a molecular substance. They have relatively low melting points and boiling points usually below 300° C . Water reacts with metals to a degree varying with their position in the electrochemical series.

The specific heat of water is 4179.6 Joules which is relatively high . This typically implies that water absorbs a larger amount of heat but the increase in temperature of its boiling points is relatively low. Thus; in the 200-mm test tube that contains water and was subsequently added to the calorimeter , the heat present was initially absorbed by the water and that does not result to an increase in the temperature change in the calorimeter. Thus the temperature change in the calorimeter will be lower.

If the diameter of the globe is 17 cm, where is the image of the person, relative to the surface of the globe?

The image of the person is not on the surface of the globe. It is either inside or outside of the globe, depending on the location of the person and the position of the observer.

The distance between the object and the thin lines is termed as the image distance. The image distance is the separation between the picture and the narrow lens. A feature of a narrow lens is its focal length, which specifies the distance at which parallel rays come into focus.

To find the image distance use following lens equation

The lens equation is a mathematical formula used in optics to calculate the relationship between the object distance (do), the image distance (di), and the focal length (f) of a lens. The equation is expressed as:

1/f = 1/do + 1/di

This equation describes the relationship between the object and image distances, and the focal length of a lens. It is used in a variety of applications, including eyeglasses, camera lenses, and microscopes, to determine the position and size of the image formed by the lens.

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it would be on the right end I believe. Forgive me if I am incorrect.

The statement, v in r 3 and v · v = 0, then v is the zero vector, is true.

In linear algebra, a vector v in R^3 (which means a 3-dimensional real vector space) is said to be a zero vector if all its components are equal to zero. This vector is also known as the null vector or null element and is denoted by the symbol 0.

The dot product of two vectors, denoted by v · v, is a scalar quantity that measures the cosine of the angle between two vectors. If the dot product of a vector with itself is equal to zero, it means that the cosine of the angle between the two vectors is zero, which implies that the two vectors are orthogonal (i.e., they are at right angles to each other).

Therefore, if v · v = 0, it follows that the vector v is orthogonal to itself, which is possible only if all its components are equal to zero. Hence, in this case, v must be the zero vector.

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If a piece of dark paper is lowered to cover the top half of the lens, you will see only the bottom half of the image on the screen which is produced by lens.

This is because the top half of the lens is now blocked, preventing light rays from that portion of the object from reaching the screen.

As a result, only the bottom half of the image will be visible. It is important to note that the image will still be inverted, as this is a property of the lens itself and is not affected by the partial blocking of light rays.

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The energy change when the temperature of a substance changes can be calculated using the specific heat capacity of the substance and the amount of the substance. In the case of liquid mercury, its specific heat capacity is 0.14 J/g°C. Using the formula Q = m × c × ΔT, where Q is the energy change, m is the mass of the substance, c is the specific heat capacity, and ΔT is the change in temperature, we can calculate the energy change as follows:

Q = 14.1 g × 0.14 J/g°C × (21.5 °C - 35.3 °C)
Q = -33.264 J

The negative value of the energy change indicates that the temperature decrease resulted in a release of energy from the mercury. This energy could have been released as heat to the surroundings or used to perform work.

The amount of energy released depends on the specific heat capacity of the substance and the amount of the substance, as well as the magnitude of the temperature change.

In this case, the temperature change of 13.8 °C resulted in a release of 33.264 J of energy from 14.1 grams of liquid mercury.

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Answer:

0.144

Explanation:

Impulse is defined as force multiplied by time

please mark me brainliest

Answer:

a) Acceleration (a) is the change in velocity (Δv) over the change in time (Δt), represented by the equation a = Δv/Δt. This allows you to measure how fast velocity changes in meters per second squared (m/s^2).

b) Using the equation  equals plus a half squared gives us is equal to 13.5 multiplied by 10 plus a half multiplied by an eighth multiplied by 10 squared. This gives us a value of of 141.25. Therefore, the total distance covered by the body in the first 10 seconds of its motion is 141.25 meter.

Explanation:

hy this isn't the proper answer but by checking these equations you can get your answer .

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A )

\(acceleration = \frac{∆v}{∆t} = slope \\ \)

Thus ;

\(acceleration = 2 \: \: \frac{m}{ {s}^{2} } \)

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B )

\(v(t) = 2t\)

So ;

\(v(60) = 2 \times (60)\)

\(v(60) = 120\)

_________________________________

Point :

The area which is under the figures in v-t graphs , shows the distance traveled.

_________________________________

Thus ;

\(distance \: traveled = \frac{1}{2} \times (60) \times 120 \\ \)

\(distance \: traveled \: = 30 \times 120 \\ \)

\(distance \: traveled \: = 3600 \: \: meters \\ \)

Done...

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Answer:A heavier body has more inertia than a lighter body. So, “ the larger the mass, the larger is inertia, and the smaller the mass, the smaller is the inertia”

Explanation:

We can say that “ the mass of a body is a measure of its inertia ”.

Answer:

a cornea that is not curved enough

Answer:

a cornea that is not curved enough

Explanation:

Or in other terms a cornea that is too flat.

The magnetic field at the center of a current-carrying loop is given by the formula: B = (μ₀/4π) * (2I/ r)

where B is the magnetic field at the center of the loop, I is the current in the loop, r is the radius of the loop, and μ₀ is the permeability of free space. In this case, we are given the magnetic field B = 3.00 mT = 3.00 × 10^(-3)  T and the radius r = 0.700 cm = 0.00700 m.Substituting these values into the above formula, we can solve for the current I: I = (B * r * 4π)/ (2 * μ₀)

I = (3.00 × 10^(-3) T * 0.00700 m * 4π)/ (2 * 4π × 10^(-7) T·m/A)

I = 0.0133 A

Therefore, the current in the loop is 0.0133 A (amperes).

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