a high speed train travels with an average speed of 250 km/h. the train travels for 2 hrs. how far does the train travel

Answer: OD. Protons and neutrons

Explanation: They are both in the nucleus. The electrons are outside.

Answer:

d (density) = M / V

V = M / d = 500 kg / (11400 kg / m^2 = .044 m^3

Substances that move to the stronger parts of a magnetic field are termed paramagnetic substances; the atomic feature responsible for this property is presence of unpaired electrons in atoms.

A paramagnetic substance is the substance that possess unpaired electrons that are heavily attracted in a magnetic field.

A magnetic field is defined as the field that exists around a magnet that produces a field of force.

Examples of paramagnetic substance include the following:

These substances are known as paramagnetic substances because they possess a high number of unpaired electrons.

Other properties of a paramagnetic substance include the following:

Therefore, Substances that move to the stronger parts of a magnetic field are termed paramagnetic substances; the atomic feature responsible for this property is presence of unpaired electrons in atoms.

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Answer:

hope you like

Explanation:

A unit of time is any particular time interval, used as a standard way of measuring or expressing duration.Its SI unit is second

A unit of length refers to any arbitrarily chosen and accepted reference standard for measurement of length. Its SI unit is meter

Explanation:

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The amount of work done by the car engine if it is 100% efficient is 366.67 Joules.

Given the following data:

To determine the amount of work done by the car engine if it is 100% efficient:

Mathematically, the work done by an object with respect to power and time is given by the formula:

\(Work\;done = \frac{Power}{time}\)

Substituting the given parameters into the formula, we have;

\(Work\;done = \frac{22000}{60}\)

Work done = 366.67 Joules.

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Torque is the rotational force acting on an object due to a force applied at a certain distance away from its pivot point. Since the force is 300N and the wrench is 0.2m away from the pivot point, the torque is 300N * 0.2m, which equals 60Nm.

The torque is the result of the force applied by a wrench multiplied by the length of the wrench. In this case, the force applied is 300N and the length of the wrench is 0.2m, so the torque is 60Nm (300N x 0.2m = 60Nm). Justification of this answer can be seen using the definition of torque. Torque is defined as the product of the magnitude of the force applied, and the distance from the force to the axis of rotation. In this case, the force of 300N is being applied at 180 degrees, so the distance from the force to the axis of rotation is 0.2m (the length of the wrench). Therefore, the torque is equal to the force multiplied by the distance, which is 60Nm (300N x 0.2m = 60Nm).

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There are 1,048,576 possible outcomes (microstates) when flipping 20 fair coins. The probability of getting the sequence "HTHHTTTHTHHHTHHHHTHT" in exactly that order is approximately 9.5367e-07.

a) There are 2 possible outcomes (heads or tails) for each coin flip, and since there are 20 coin flips, the total number of possible outcomes, or microstates, is given by 2²⁰

Answer: 2²⁰= 1,048,576 possible outcomes.

b) To calculate the probability of getting the sequence "HTHHTTTHTHHHTHHHHTHT" in exactly that order, we need to determine the probability of obtaining each individual outcome (head or tail) and multiply them together.

Since each coin flip is independent and has a 1/2 chance of resulting in either heads or tails (assuming the coins are fair), the probability of obtaining the desired sequence is (1/2)²⁰

Answer: (1/2)²⁰≈ 9.5367e-07

c) To calculate the probability of getting exactly 12 heads and 8 tails in any order, we need to determine the number of ways to arrange 12 heads and 8 tails within the 20 coin flips.

This can be calculated using the binomial coefficient, also known as "n choose k." The formula for the binomial coefficient is:

C(n, k) = n! / (k! * (n-k)!)

Where n is the total number of coin flips and k is the number of heads.

Using this formula, the probability can be calculated as follows:

P(12 heads and 8 tails) = C(20, 12) * (1/2)^20

Calculating C(20, 12):

C(20, 12) = 20! / (12! * (20-12)!)

          = 20! / (12! * 8!)

          = (20 * 19 * 18 * 17 * 16 * 15 * 14 * 13) / (8 * 7 * 6 * 5 * 4 * 3 * 2 * 1)

          = 125,970

P(12 heads and 8 tails) = 125,970 * (1/2)^20

Answer: P(12 heads and 8 tails) ≈ 0.12013435364 (approximately)

a) There are 1,048,576 possible outcomes (microstates) when flipping 20 fair coins.

b) The probability of getting the sequence "HTHHTTTHTHHHTHHHHTHT" in exactly that order is approximately 9.5367e-07.

c) The probability of getting exactly 12 heads and 8 tails in any order is approximately 0.12013435364.

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the order of vector addition doesn't affect the resultant vector and grouping or order of pair doesn't effect the sum.

Answer:

Fluorescent lamp with a 30 in its nomenclature indicates it produces light with a colour temperature of 3000k

Explanation:

A low-pressure mercury vapor gas discharge lamp called a fluorescent lamp or fluorescent tube employs fluorescence to create visible light. Mercury vapor is excited by an electric current in the gas, which generates short-wave UV rays that causes a phosphor coating on the inside of the lamp to glow. For a fluorescent lamp with 30 in to provide good rendition to warm colour, the colour temperature must be at least up to 3000k. The colour of light emitted by a hypothetical opaque, non-reflective substance at a specific temperature expressed in kelvins is known as colour temperature. Regardless of the temperature of other light sources, the colour of their light is classified using the colour temperature scale.

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If you could somehow travel at a jet-plane speed of 2800 km/h, it would take approximately 1.20 × 10^9 years to cover a distance equivalent to one light-year.

To determine the time it would take to travel a certain distance at jet-plane speed, we need to know the distance that needs to be covered. However, in this case, the distance mentioned is one light-year, which is approximately 9.46×10^12 km.

If we consider traveling at a jet-plane speed of 2800 km/h, it is still significantly slower compared to the immense distance of one light-year. Let's calculate the time it would take to cover this distance.

Time = Distance / Speed

Time = (9.46×10^12 km) / (2800 km/h)

Converting the units, we have:

Time = (9.46×10^12 km) / (2800 km/h) * (1 h / 3600 s) * (1 year / 365 days) * (1 day / 24 h)

Calculating this, we get:

Time ≈ 1.20 × 10^9 years

Therefore, if you could somehow travel at a jet-plane speed of 2800 km/h, it would take approximately 1.20 × 10^9 years to cover a distance equivalent to one light-year.

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Answer:

Explanation:

Box 1:  heat, metals, independent

Box 2:  metals, insulators, dependent

Box 3:  attracted, metals, independent

Answer:

false

Explanation:

it moves from positive to negative

Answer:

A Chemical Reaction towards Oxygen, Water, and the Chemical Color.

Assuming that there is no friction or other forms of energy loss in the system, the change in kinetic energy of the block after it is released from rest and has traveled a distance of a2 can be calculated using the conservation of energy principle, which states that the total mechanical energy of a system remains constant.

At the starting point, all of the potential energy stored in the spring is converted to kinetic energy as the block is released from rest.Therefore, at the starting point, the kinetic energy of the block is zero and the potential energy stored in the spring is u₀.

When the block has traveled a distance of a2, it has reached a point where it has no potential energy left, as the spring has returned to its original length.

At this point, all of the energy is in the form of kinetic energy. Therefore, the kinetic energy of the block when it has traveled a distance of a2 is given by:

K = U₀

where K is the kinetic energy of the block and U₀ is the initial potential energy stored in the spring.

The change in kinetic energy of the block as it travels from the starting point to a distance of a2 can be calculated by subtracting the initial kinetic energy from the final kinetic energy:

ΔK = K2 - K1

= U₀ - 0

= U₀

Therefore, the change in kinetic energy of the block after it is released from rest and has traveled a distance of a2 is equal to the initial potential energy stored in the spring, which is U₀.

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To determine the empirical formula, we need to find the mole ratio of the elements in the compound. We can assume a 100 g sample of the compound, which means:

Mass of carbon = 62.1 g

Mass of hydrogen = 5.21 g

Mass of nitrogen = 12.1 g

Mass of oxygen = (100 - 62.1 - 5.21 - 12.1) = 20.59 g

Next, we need to convert the masses to moles:

Moles of carbon = 62.1 g / 12.011 g/mol = 5.17 mol

Moles of hydrogen = 5.21 g / 1.008 g/mol = 5.17 mol

Moles of nitrogen = 12.1 g / 14.007 g/mol = 0.864 mol

Moles of oxygen = 20.59 g / 15.999 g/mol = 1.287 mol

The smallest mole value is that of nitrogen, which is approximately 0.864 mol. We can use this value as a reference to find the mole ratio of the other elements:

Carbon: 5.17 mol / 0.864 mol ≈ 5.99 ≈ 6

Hydrogen: 5.17 mol / 0.864 mol ≈ 5.99 ≈ 6

Nitrogen: 0.864 mol / 0.864 mol = 1

Oxygen: 1.287 mol / 0.864 mol ≈ 1.49 ≈ 1.5

The mole ratio of the elements in the compound is approximately C6H6N1.5O1 or simplified, C12H12N3O2. This is the empirical formula of the compound.

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Yes, it is true that Incandescent light normally produces redder tones or warmer casts in the objects it lights.What is incandescent light?Incandescent light refers to the light emitted from an object, which has been heated to a high temperature, such as a filament inside a bulb. Incandescent light is generated when an object, such as a filament or an electric stove element, is heated to a high temperature. It produces light through the process of incandescence.What are color tones?Color tones are defined as the hues and shades used in a work of art, specifically those that are visible to the eye. When artists work with color, they often use color tones to help create the overall tone of their work of art. Color tones are also used to help create a mood or atmosphere in a work of art. In general, color tones can be classified into warm and cool colors.Incandescent light generally produces a warm or reddish cast on objects that it illuminates. This is due to the fact that incandescent light emits light across the spectrum but is weighted toward the red end, which results in a warmer and yellower tone in objects that are illuminated. As a result, incandescent lights are ideal for highlighting warm colors such as oranges, yellows, and reds.

Incandescent light normally produces what color tones in the objects it lights?Incandescent light produces redder tones or warmer casts in the objects it lights.What is an incandescent light?Incandescent lighting is the most common and fundamental form of electric lighting.

The bulb has a filament made of tungsten wire, which is heated until it glows by passing an electric current through it. Incandescent lights emit warm tones, so they can make the room look cozy and inviting.Incandescent lights have become much less common than they used to be due to their energy inefficiency.

Even so, incandescent bulbs are still available in some parts of the world, and they are used in a few special applications. Incandescent lightbulbs have a tendency to create redder tones or warmer casts in objects illuminated by them.

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Answer: CO

I hope this helps

Answer:

co

Explanation:

A mass on a spring undergoes simple harmonic motion. When the mass passes through the equilibrium position, its instantaneous velocity is maximum.

Simple harmonic motion or SHM is the alternating motion of an object that passes through a certain balance point. SHM has a fixed frequency and amplitude and is periodic, namely movements that occur regularly and are repeated at the same time.

When a spring undergoes simple harmonic motion, the mass accelerates in a direction toward the equilibrium point, then the velocity of the object at the equilibrium point is maximum. The object is accelerating in a direction toward the equilibrium point. Acceleration caused by the force recovered.

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The distance between the two charges is approximately 0.0285 meters

We can use Coulomb's law to solve for the distance between the two charges, which gives the force between two charges kept at some distance between them as :

                                        F = kq1q2/r^2

where,

F is the electric force,

k is Coulomb's constant,

q1 and q2 are the magnitudes of the charges, and

r is the distance between them.

Rearranging the equation:

r = sqrt(kq1q2/F)

Substituting the given values:

r = sqrt((9 x 10^9 N·m^2/C^2) x (2.0 x 10^-5 C)^2 / (1436.8 N))

r = 0.0285 m

Therefore, the distance between the two charges is approximately 0.0285 meters.

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Answer:

Starting speed  Vo = 6.7 m/s

Explanation:

Given:

t = 9.0 s

S = 30 m

___________

V₀ - ?

The path is numerically equal to the area of  the figure lying under the velocity graph:

S = V₀* t / 2

Starting speed:

V₀ = 2*S / t = 2*30 / 9 ≈ 6.7 m/s

The particles in an atom that are considered "light" are the electrons.

The three types of particles found in atoms are protons, neutrons, and electrons. Protons and neutrons are found in the nucleus of the atom, while electrons orbit around the nucleus in electron shells. Electrons are considered "light" particles because they have a much smaller mass than protons and neutrons.

Specifically, electrons have a mass of approximately 9.1 x 10^-31 kilograms, which is about 1/1836th the mass of a proton or neutron. This small mass makes electrons highly mobile and allows them to be involved in chemical reactions and electrical conductivity.

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Answer:

The correct option is;

c. 45°

Explanation:

The given information is that the angle the vector makes with the horizontal = θ

Let the magnitude of the resultant vector = R

The horizontal component of the vector are given as follows;

Rₓ = R × cos(θ)

The vertical component of the vector are given as follows;

\(R_y\) = R × sin(θ)

The resultant vector, R, in vector form, R, is the sum of the horizontal and vertical components as follows;

R = R × cos(θ)·i + R × sin(θ)·j

Therefore;

The horizontal and vertical component will be equal when cos(θ) = sin(θ)

Given that tan(θ) = sin(θ)/cos(θ), we have that when cos(θ) = sin(θ), tan(θ) = sin(θ)/cos(θ) = sin(θ)/sin(θ) = 1

tan(θ) = 1,

∴ θ = tan⁻¹(1) = 45°

θ = 45°.

Answer:

c. 45°

Explanation:

The vector BR in unit vector notation is:

BR = 8.485 î + 8.485 j

What is Vector?

Vectors can be added together to find the result, which is known as the vector sum. The vector sum can be found using the head-to-tail method, where the tail of one vector is placed at the head of the other vector. The vector sum is the vector that goes from the tail of the first vector to the head of the second vector.

To write the vector BR in unit vector notation, we need to find its components in the i and j directions.

Given that the magnitude of the vector is 12.0 and it makes an angle of 45 degrees with the positive x-axis, we can use trigonometry to find the components.

The x-component (i-direction) of the vector is given by:

Bx = B cos θ = 12.0 cos 45° = 8.485

The y-component (j-direction) of the vector is given by:

By = B sin θ = 12.0 sin 45° = 8.485

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Answer:

44 ohms.

Explanation:

R for V (according to Ohm's law). This second formula is more frequently used in practice to calculate resistive heating, whereas the first formula has other, more general applications. As we might infer from the equation, the units of watts also correspond to amperes2 x ohms (A2 x Ω).

Answers:

The values are approximate.

==========================================================

Explanation:

When near the surface of the earth, the acceleration of gravity is roughly 9.81 m/s^2. This means that after each second passes, the velocity increases by roughly 9.81 m/s.

After 2.5 seconds, the velocity increases by 2.5*9.81 = 24.525 m/s = 24.5 m/s

If it was already going 25.0 m/s, then it bumps up to 25.0+24.5 = 49.5 m/s which is also approximate.

The acceleration of gravity stays the same when the object is close to the surface of the earth, so it stays at roughly 9.81 m/s^2

Side note: I'm ignoring air resistance (aka air friction or drag) since that greatly complicates things, and we would need to know the shape and surface area of the object. The material type would also be relevant info as well.

Answer:

F = 7.7 [N]

Explanation:

In order to solve this problem, we must use Newton's second law, which tells us that the sum of forces on a body is equal to the product of mass by acceleration.

ΣF = m*a

where:

m = mass = 3.5 [kg]

a = acceleration = 2.2 [m/s^2]

F = (3.5*2.2) = 7.7 [N]

The brightness and intensity of a color are defined by its saturation. To lower the saturation of a pigment hue, both white and black (grey) are added to the color.

What does saturation mean in color?

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