who is the first president of the United States
A. George Washington
B. Donald Trump
C.Joe Biden​

At the colonial times, virginia sold the most tobacco since Virginia was making the most tobacco at the time. The other locations weren't either fertile enough to make tobacco for export or wasn't found yet to be considered colonial times.

From the given list of items, examples of matter include, heat, air, water, gasoline, and bacteria.

Matter is a substance made up of various types of particles that occupies physical space and has inertia.

A matter must have mass and occupy space.

Examples of matter include the following;

Thus, from the given list of items, examples of matter include, heat, air, water, gasoline, and bacteria.

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Answer: the man can power 2 incandescent light bulbs

Explanation:

Given that;

power produced by the body while riding = 500 W

Efficiency of generator = 40% = 0.4

First we need to convert the mechanical energy to electric energy;

which efficiency of generator multiply by power input, so

⇒ 0.4 × 500 = 200 W

Now, if 1 incandescent light bulbs is 100 W

x incandescent light bulbs bulbs is 200 W

100x W= 200 W

x = 200 W / 100 W

x = 2

Therefore, the man can power 2 incandescent light bulbs

The answers are (a) |q| = 58.2 cm, M = -1.50, virtual, upright, shrunk; (b) |q| =, M = -, actual, substantially magnified; and (c) |q| = 6.5 cm, M = -1.68, virtual, upright, enlarged.

We can use the magnification formula and the thin lens equation to solve:

Where f is the lens's focal length, d_i is the image distance, and d_o is the object distance, the equation is: 1/f = 1/d_i + 1/d_o.

The formula for magnification is M = -d_i/d_o, where M stands for magnification.

For part (a), the object distance is d_o = -38.8 cm and the focal length is f = -19.4 cm.

1/-19.4 = 1/d_i + 1/-38.8

|d_i| = 58.2 cm

The image is virtual and smaller than the object (since the magnification is less than 1)

For part (b), the object distance is d_o = -19.4 cm, and the focal length is f = -19.4 cm.

1/-19.4 = 1/d_i + 1/-19.4

|d_i| = ∞

The image is at infinity, which means it is a real image and highly magnified (since the object distance is close to the focal length).

For part (c), the object distance is d_o = -9.70 cm, and the focal length is f = -19.4 cm.

1/-19.4 = 1/d_i + 1/-9.70

|d_i| = 6.5 cm

The image is virtual and larger than the object (since the magnification is greater than 1).
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Answer:

720

Explanation:

Answer:

a = 1 m/s^2

Explanation:

if we assume that right is the positive x direction and y is the negative x-direction then we get:

Fr = 8N

Fl = -3N

We then find the net force acting upon the object

Ft = Fr + Fl

Ft = 8N - 3N

Ft = 5N

After we find net force acting upon the object we can then use Newton's 2nd Law to find its acceleration.

Ft = m*a

Isolate accerleration

a = Ft / m

a = 5N / 5kg

a = 1 m/s^2

A capacitor stores electrical energy, whereas capacitance is the ratio of a stored charge on each plate to the electric potential difference between the plates. Therefore, second option is correct.

Whenever the charge stored in the capacitor increases it increase the capacitance of capacitor but when the potential difference increases it decrease the capacitance of a capacitor.

Answer:

a

 \(k = 457333.3 N/m\)

b

\(x_a =0.09\ m\)      

Explanation:

From the question we are told that

    The total mass of  three people is  \(M = 2.00*10^{2} \ kg\)

     The mass of the car is  \(m_c = 1.200 *10^{3} \ kg\)

     The compression of the car spring is  \(x = 3 \ cm = 0.03 \ m\)

Generally the spring constant is mathematically represented as

          \(k = \frac{F}{x}\)

Here F is the force exerted by the mass of three people and that of the car , this is mathematically represented as        

=>       \(F = (M +m_c) *g\)

=>       \(F = ([2.0*10^{2} ]+[ 1.200*10^{3}]) * 9.8\)

=>       \(F = 13720 \ N\)

So

        \(k = \frac{13720}{0.03}\)

=>     \(k = 457333.3 N/m\)

Generally if the mass which the car is loaded with is  \(m = 3.00*10^{2} \ kg\)

Then the force experienced by the spring is  

         =>       \(F_a = (m +m_c) *g\)

         =>       \(F_a = (3.00*10^{3} + 1.200 *10^{3}) * 9.8\)

         =>       \(F_a = 41160 \ N\)

Generally from the above formula the compression is  

       \(x_a = \frac{F_a}{k}\)

=>    \(x_a = \frac{41160}{457333.3}\)

=>    \(x_a =0.09\ m\)      

Answer:

Water because the salt will just make it colder and the sugar won't do anything

The expression \(X^{N} + Y^{N}\)is not divisible by X - Y (where Y is not equal to 0).

To determine whether the expression \(X^{N} + Y^{N}\) is divisible by X - Y (where Y is not equal to 0), we can use the factor theorem and the property of binomial expansion.

The factor theorem states that if a polynomial P(x) is divisible by (x - a), then P(a) equals zero. In our case, if \(X^{N} + Y^{N}\) is divisible by (X - Y), then when we substitute X = Y into the expression, the result should be zero.

Let's substitute X = Y into the expression:

\(Y^{N} + Y^{N}\)

Since \(Y^{N}\) is equivalent to \(Y^{N}\) , the expression becomes:

2(\(Y^{N}\))

We can see that the expression 2(\(Y^{N}\)) is not equal to zero unless Y is equal to zero. Therefore, if Y is not equal to zero, \(X^{N} + Y^{N}\) is not divisible by X - Y.

In summary, unless Y is equal to zero, the expression \(X^{N} + Y^{N}\) is not divisible by X - Y according to the factor theorem and the given condition.

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Answer:

F = 2.6 x 10⁻²² N

Explanation:

According to the Coulomb's Law, the force of attraction or repulsion between two charges is directly proportional to the product of the magnitudes of both the charges and inversely proportional to the square of the distance between them. The formula for the force is given as follows:

F = k q₁ q₂/r²

where,

F = Force of Attraction or Repulsion = ?

q₁ = magnitude of first charge = charge on electron = 1.6 x 10⁻¹⁹ C

q₂ = magnitude of second charge = charge on proton = 1.6 x 10⁻¹⁹ C

k = Coulomb's Constant = 9 x 10⁰ N m²/C²

r = distance between the charges = 885 nm = 8.85 x 10⁻⁷ m

Therefore,

F = (9 x 10⁹ N.m²/C²)(1.6 x 10⁻¹⁹ C)(1.6 x 10⁻¹⁹ C)/(8.85 x 10⁻⁷ m)²

F = 2.6 x 10⁻²² N

Answer:

Work transfers energy

Explanation:

Work can affect energy by transfering energy between objects to result to a change in the amount and form of energy

Hope you could understand.

If you have any query, feel free to ask.

Answer:

The tension in the rope if it is parallel to the slope is 24.31 N.

Explanation:

Given;

mass of the sled, m = 9 kg

angle of inclination of the slope, θ = 16⁰

The tension in the rope if it is parallel to the slope is calculated from the parallel component of the tension;

\(T_|_| = mgSin \theta\\\\T_|_| = 9 \times 9.8 \times sin(16^0)\\\\T_|_| = 24.31 \ N\)

Therefore, the tension in the rope if it is parallel to the slope is 24.31 N.

The sound volume of 5.0 metres in distance from the machine settles at 100 dB.

It should be noted that to understand the volume level in decibels (dB) situated at a range of 5.0 metres from the machine, we need to first comprehensively calculate the intensity wattage per square meter (W/m^2) using the provided formula:

L = 10log10(I/Io),

where Io = 10^-16 W/m² and I = 0.0001 x 1 kW/m^2 = 0.1 W/m^2 (In forming noise, 0.01% of 1 kW is being used).

Thus, placing in these values, yields:

L = 10log10(0.1/10^-16) = 100 dB

Consequently, the sound volume of 5.0 metres in distance from the machine settles at 100 dB.

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A simple pendulum is considered to be a point mass suspended from a string or rod of negligible mass. If the pendulum is displaced from its equilibrium position, it will swing due to the force of gravity. Additionally, if there is damping (that can come from friction with the air), the pendulum will loose energy as it swings until it stops moving.

According to the variables in the diagram, the maximum velocity of a pendulum can be calculated using the conservation of mechanical energy:

The height that the mass reaches is equal to:

The potential energy at that point, is:

The kinetic energy at the equilibrium position will be related to the maximum velocity:

Then:

Isolate v_max:

While much of the mass of our Galaxy lies within the bright spiral arms, the majority of the mass actually lies outside the luminous part of the Milky Way Galaxy.So the correct option is c.

The Milky Way Galaxy is a vast and expansive collection of stars, gas and dust that spans the universe. It is estimated to contain between 200 and 400 billion stars, making it one of the largest galaxies in the universe. The Milky Way is a spiral galaxy, meaning that it is composed of a central bulge surrounded by four main spiral arms. The luminous part of the Milky Way Galaxy, which is visible from Earth, lies within the spiral arms.

However, the majority of the mass of our Galaxy does not lie within the luminous part of the Milky Way Galaxy. Instead, much of the mass of the Milky Way lies outside the visible part of our Galaxy. This mass is found in the form of dark matter, which is an invisible form of matter that does not emit any light. Dark matter makes up around 85 percent of all the matter in the Universe and is believed to be responsible for the structure and evolution of galaxies.

The rest of the mass of our Galaxy is located within the bulge at the center of the Milky Way, as well as between Earth and the Galactic center. This mass is made up of stars, gas, dust and other forms of matter. While much of the mass of our Galaxy is invisible, it is still an important component of the Milky Way. Without this mass, the structure and evolution of the Milky Way would be drastically different.

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Answer:

E-MgO(Magnesium Oxide)

The buoyant force can be determined by subtracting the apparent weight of the object in water from its weight in air. In this case, the buoyant force would be 7N - 4N = 3N.

Based on the information provided, since the buoyant force (3N) is less than the weight of the object (7N), the object will not float.

Floating occurs when the buoyant force is greater than or equal to the weight of the object.

In this scenario, the object will experience a net downward force, indicating that it will sink rather than float in water.

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Answer:

True

Newton's Rainbow. In the 1660s, English physicist and mathematician Isaac Newton began a series of experiments with sunlight and prisms. He demonstrated that clear white light was composed of seven visible colors.

Explanation:

Hope it helps

Answer:

Beat frequency together = 2.95 Hz (Approx)

Explanation:

Given:

Frequency (F) = 294 H

Decrease in tension = 2%

Find:

Beat frequency together

Computation:

Tension = (100 - 2) / 100

Tension (T) = 0.98

Beat frequency together = Frequency (F) - (√T × F)

Beat frequency together = 294 - (√0.98 × 294)

Beat frequency together = 2.95 Hz (Approx)

The beat frequency heard when the two strings are played together is 2.95 Hz.

Given data:

The tuning frequency of the violin is, f = 294 Hz.

Decrement in the tension is, 2 %.

Since, tension is reduced at the rate of 2%. Then the new magnitude of tension on the string is,

T = (100 - 2 )/100

T = 0.98

Then the expression for the beat frequency heard when the two strings are played together is given as,

\(f_{b}=f -(\sqrt{T \times f})\)

Solving as,

\(f_{b}=294-(\sqrt{0.98 \times 294})\\\\f_{b}=2.95\;\rm Hz\)

Thus, we can conclude that the beat frequency heard when the two strings are played together is 2.95 Hz.

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Answer:

The answer is "Cerebral Cortex"

Explanation:

The neurotransmitter diffuses across the short distance of the synapse and ties to a receptor protein of the objective neuron. At the point when the sub-atomic sign ties to the receptor, the cell film of the objective neuron changes its electrical state and another evaluated expected starts. On the off chance that that evaluated potential is sufficiently able to arrive at limit, the subsequent neuron produces an activity potential at its axon hillock. The objective of this neuron is another neuron in the thalamus of the mind, the piece of the CNS that goes about as a transfer for tactile data.

At another neurotransmitter, synapse is delivered and ties to its receptor. The thalamus at that point sends the sensory information to the cerebral cortex, the furthest layer of dark issue in the brain, where cognizant view of that water temperature starts.

A region of the cortex is particular for imparting signs down to the spinal cord for development. The upper engine neuron is in this area, called the precentral gyrus of the frontal cortex, which has an axon that broadens right down the spinal cord. At the degree of the spinal cord at which this axon makes a neurotransmitter, a reviewed potential happens in the cell membrane of a lower engine neuron.

Answer:

140.8/2.54=55.43 inches

V = at + V0

where v0 is the initial speed, a is the acceleration and t is the time.

So:

v = 5m/s^2*5s + 25m/s = 50 m/s

Given:

• Planck's constant, h = 6.626×10⁻³⁴ J⋅s

• Speed of light, c = 2.99×10⁸ m/s

• Energy = 4.80×10⁻¹⁹ J

Let's find the wavelength of the photon.

Apply the formula for photon energy:

Where:

λ is the wavelength.

Rewrite the formula for λ, plug in the values and solve.

We have:

Thus, we have:

Therefore, the wavelength of the photon is 4.13 x 10⁻⁷ meters.

• ANSWER:

4.13 x 10⁻⁷ m.

Answer and Explanation:

A well-coated structure is defined as having a coating that meets a certain standard of quality. The answer to this particular question depends on the specific criteria being used to evaluate the coating. This would typically require a coating coverage of 90% or better, if not higher.

However, in general, a well-coated structure would typically refer to a surface that has been thoroughly and evenly covered with a coating material such as paint or varnish. This ensures that the underlying material is protected from environmental factors such as moisture and UV radiation. In addition, a well-coated structure can also improve the overall appearance of the surface, making it more aesthetically pleasing. Regarding the options provided in the question, the answer would depend on the specific criteria being used to evaluate the coating. However, it is safe to say that a well-coated structure would require a high level of coating coverage, with minimal areas left uncovered or with an uneven application. This would typically require a coating coverage of 90% or better, if not higher. Ultimately, the specific answer would depend on the standards and expectations set by the evaluating body.

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A well-coated structure is defined as having a coating that meets a certain standard of quality. The answer to this particular question depends on the specific criteria being used to evaluate the coating. This would typically require a coating coverage of 90% or better, if not higher.

However, in general, a well-coated structure would typically refer to a surface that has been thoroughly and evenly covered with a coating material such as paint or varnish. This ensures that the underlying material is protected from environmental factors such as moisture and UV radiation. In addition, a well-coated structure can also improve the overall appearance of the surface, making it more aesthetically pleasing.

Regarding the options provided in the question, the answer would depend on the specific criteria being used to evaluate the coating. However, it is safe to say that a well-coated structure would require a high level of coating coverage, with minimal areas left uncovered or with an uneven application. This would typically require a coating coverage of 90% or better, if not higher. Ultimately, the specific answer would depend on the standards and expectations set by the evaluating body

Answer:

About 3.47kg

Explanation:

Recall that weight is equal to mass times acceleration.

In this case, our acceleration is due to gravity which on earth is about 9.8m/s/s

So we have 34N=9.8 *mass, divide both sides by 9.8 we get mass is equal to about 3.47kg.