Which is not true about the variables in the relationship F = ma?

A. Acceleration is directly proportional to mass.

B. Force is directly proportional to mass.


C. Force is directly proportional to acceleration.

D. Acceleration will double if force is doubled.​

Answer:

 I₃ = I₀ 0.395

Explanation:

Polarized light passing through a polarizer must comply with Malus's law

         I = I₀ cos² θ

Before starting, let's analyze the angle between the polarizers, the second has the same angle with the first and the third, so it is at the midpoint

         θ₂ = 39/2 = 19.5

now let's analyze the light that passes through each polarizer, as the incident is unpolarized through the first polarizer half the intensity comes out

          I₁ = I₀ / 2

the second polarizer comes out

          I₂ = I₁ cos² 19.5

          I₂ = I₀ / 2 cos² 19.5

through the third polarized the intensity passes

          I₃ = I₂ cos² 19.5

          I₃ = (I₀ /2 cos² 19.5) cos² 19.5

          I₃ = I₀ 0.395

Hope you could understand.

If you have any query, feel free to ask.

Answer:

  17 1/7 cm ≈ 17.1 cm in front of the mirror

Explanation:

You want the location of the image formed of an object placed 40.0 cm in front of a concave mirror with radius of curvature 24.0 cm. The object is 2.5 cm tall.

For a spherical concave mirror with radius of curvature r, the relationship between the distance from the mirror to the image (i) and the distance from the mirror to the object (o) is ...

  2/r = 1/i +1/o

Solving for i, we get ...

  i = 1/(2/r -1/o) = 1/(2/24 -1/40) = 120/7 = 17 1/7 ≈ 17.1 . . . . cm

The image will be formed about 17.1 cm in front of the mirror.

__

Additional comment

The magnification is -i/o = (-120/7)/40 = -3/7. The image height is about -15/14 ≈ -1.07 cm. The minus sign means the image is inverted with respect to the object.

The actual formula uses 1/f where f is the focal length. The "small angle approximation" for a spherical mirror says f = r/2, so 1/f = 2/r.

The attachment shows calculation of the image height as well as its location.

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Answer: c opinion is something ppl just suggest but a theory needs proof before it is confirmed

(a) A = B × r is a vector potential for B, where r = {x, y, 0}.

(b) The flux through a surface S can be calculated as Φ = ∫B·dA, where B is the magnetic field and dA is an infinitesimal area vector perpendicular to the surface.

(a) To verify that A = B × r is a vector potential for B, we need to show that ∇ × A = B.

Using the cross product property, we have ∇ × A = ∇ × (B × r). Applying the vector identity (A × B) × C = B(A · C) - C(A · B), we get ∇ × (B × r) = B(∇ · r) - r(∇ · B).

Since ∇ · r = 0 (as r = {x, y, 0}), and ∇ · B = 0 (as B has a constant magnitude in the z-direction), we find that ∇ × A = B, verifying A = B × r as the vector potential for B.

(b) The flux through a surface S can be calculated as Φ = ∫B·dA, where B is the magnetic field and dA is an infinitesimal area vector perpendicular to the surface.

Given that B has a constant strength b teslas in the z-direction, the flux through surface S will be Φ = ∫B·dA = ∫(0, 0, b) · (dxdy) = b∫dxdy = bA, where A is the area of the surface S.

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The current present in secondary coil is 75.19A.

Transformers are used in a wide range of electrical and electronic applications, performing a variety of tasks including isolation, stepping up or down voltage and current, noise rejection, signal measurement, regulation, and a host of other tasks specific to a given application.

Turns ratio testing is one of the most popular tests used to determine whether a transformer will perform according to its design specifications.

The fundamental theory of turns ratio will be briefly reviewed in this technical note, after which we'll discuss some new concerns that should be taken into account when testing this crucial transformer property.

The induced voltage effect in any coil caused by a shifting magnetic flux surrounding the coil is described by Faraday's law of induction, which was discovered in 1831.

Mathematics-

\(i=2\pi\alpha I/\sqrt{2}\)

i=current through secondary coil

I= current through primary coil

α= standard energy gap

Calculations-

=2 x 3.13 x 4.13 x 4.1/1.414

=75.19A

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The answer is 0.47 m, which is closest to the option (A) 0.71 m.

First we can use trigonometry. The height of the end of the treadmill raised is the opposite side of the right triangle, and the length of the treadmill is the hypotenuse.

The angle of inclination is the angle between the height and the hypotenuse, so we can use the sine function to find the height:

sin(17°) = opposite/hypotenuse

The length of the treadmill is 1.75 m, so:

opposite = sin(17°) x 1.75 m

opposite = 0.472 m

Therefore, the height of the end of the treadmill raised is approximately 0.47 m.

So the answer is 0.47 m, which is closest to the option (a) 0.71 m.

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mass of an object is always constant

weight is a force, \(W=mg\) where $g$ is acceleration due to gravity.

Weight on earth is , $900=m\cdot 10 \implies m=90$ kg

weight on moon is $150=90\times g_{\text{moon}} \implies g=\frac{5}{3}$

Answer:

Magma, lava, and ash that reach the surface slowly cool and harden causing them to being extrusive igneous rock.

Answer:

Fnet=7200 N

Explanation:

Fnet=mass x acceleration

mass= 1600kg acceleration=4.5m/s^2

Answer:

Net force= 7200 N or 7200 N*m/s^2 (It just depends)

Explanation:

1600 kg x 4.5 m/s^2 = 7200 kg*m/s^2 or 7200 N*m/s^2

Answer:

tungsten wire

Explanation:

incandescent light bulbs consist of an air-tight glass enclosure (the envelope, or bulb) with a filament of tungsten wire inside the bulb, through which an electric current is passed. Contact wires and a base with two (or more) conductors provide electrical connections to the filament

Answer:

The planet's mass and size determine the gravity of a planet

Explanation:

The smaller and less mass a planet has, the less gravitational pull it has on things and vice versa. The same can be applied with all living things, we all have an extremely small gravitational pull.

Answer:

sorry don't know i just need points

Explanation:

Energy that travels through space in the form of waves is known as electromagnetic radiation.

Electromagnetic radiation is a type of energy that travels through space in the form of waves. It is also referred to as light, electromagnetic waves, or radiant energy. Electromagnetic radiation can travel through empty space and does not need a medium to propagate. The energy of electromagnetic radiation is determined by its frequency and wavelength.

Electromagnetic radiation is an energy that is transferred through space in the form of waves. This energy is composed of electric and magnetic fields that oscillate perpendicular to each other and propagate through space at the speed of light. Electromagnetic radiation is a form of energy that travels through space at the speed of light. It can be emitted by a wide range of sources, including stars, light bulbs, and radio antennas.

The electromagnetic spectrum is a range of frequencies and wavelengths that electromagnetic radiation can have. The spectrum includes radio waves, microwaves, infrared radiation, visible light, ultraviolet radiation, X-rays, and gamma rays. Each of these types of radiation has a different frequency and wavelength and interacts with matter in different ways.

Electromagnetic radiation is an essential component of our universe. It allows us to see and hear, and it is also responsible for many other phenomena, including heat transfer, chemical reactions, and the absorption of light by plants for photosynthesis. It is also used in a wide range of technologies, including radios, televisions, cell phones, and medical imaging equipment.

In conclusion, electromagnetic radiation is a form of energy that travels through space in the form of waves. It includes a range of frequencies and wavelengths, from radio waves to gamma rays. It interacts with matter in different ways and is used in a variety of technologies. Electromagnetic radiation is an essential component of our universe, and its properties and applications continue to be studied and utilized in many fields.

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Answer:

Weight on Mars =  55.5 Newtons

Approximately 37.72% of weight on earth

Explanation:

Mass of an object is unchanged throughout the universe

Therefore mass on Mars = mass on Earth = 15kg

Weight = mass x freefall acceleration

Weight on Earth = 15 kg x 9.81 m/s² = 147.15 Newtons (N)
Weight on Mars = 15 x 3.7 m/s² = 55.5 N

Therefore weight on Mars/ weight on earth = 55.5 N/147.15N

≈ 0.3772

= 37.72 % of weight on earth

Answer:

2.38 T

Explanation:

Since the number of coils and the change in time are both 1, I set it up as 3.57=1.50(x) and then solved for x to be 2.38 T.

As a freely falling object picks up downward speed. What happens to the power supplied by the gravitational force? The power will increase because (Power=work/time; work=f(d); and F x d/t; FV).

As a freely falling object picks up downward speed. What happens to the power supplied by the gravitational force? The power will increase because (Power=work/time; work=f(d); and F x d/t; FV).

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The electrical force acting on the charge is 3.6 N.

The electrical force experienced by a charged object in an electric field is given by the equation F = qE, where F is the force, q is the charge, and E is the electric field strength.

Plugging in the values, we have

F = (9.0 × 10^(-5) C) × (4.0 × 10^4 N/C) = 3.6 N.

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Answer:

1.927  m/s^2

Explanation:

period = 2 pi  sqrt ( l/g)  

3.2   =  2 pi sqrt (.5/g) =1.927 m/s^2

answer: 3.2 volts

i hope this is right

Answer:

A star like our Sun will become a white dwarf when it has exhausted its nuclear fuel. Near the end of its nuclear burning stage, such a star expels most of its outer material (creating a planetary nebula) until only the hot (T > 100,000 K) core remains, which then settles down to become a young white dwarf.

Answer:

Glucose diffuse from the blood plasma, across the capillary walls to the tissue fluid, and then to the cell.

Glucose diffuse from the blood plasma, across the capillary walls to the tissue fluid, and then to the cell. The waste product urea diffuse from the cells of the liver to the tissue fluid, and then across the capillary walls into the blood plasma.

The time it takes for light to travel across the Milky Way galaxy is approximately 102,000 years (to the nearest thousand)

The speed of light is 186,000 miles per second. The Milky Way galaxy has an approximate diameter of 6 × 10¹⁷ miles. Therefore, we can estimate the time it takes for light to travel across the Milky Way by dividing the distance by the speed of light. Using this formula, we can say that:

Time taken for light to travel across the Milky Way galaxy= 6 × 10¹⁷ miles/186,000 miles per second= 3.23 × 10¹² seconds.1 year has 365.25 days, and each day has 24 hours, each hour has 60 minutes and each minute has 60 seconds.

So the number of seconds in one year = 365.25 days × 24 hours × 60 minutes × 60 seconds= 31,536,000 seconds.

Therefore, we can determine the time it takes for light to travel across the Milky Way in years by dividing the time taken by the number of seconds in a year, as follows:

3.23 × 10¹² seconds/31,536,000 seconds per year= 1.02 × 10⁵ years.

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The strength of the magnetic field required to exactly balance the weight of the proton and keep it moving horizontally is 0.0414 T.

To balance the weight of the proton and keep it moving horizontally, we need to apply a magnetic field with a strength equal to the gravitational force acting on the proton.

The force experienced by a charged particle moving in a magnetic field is given by the formula:

F = q * v * B

where:

F is the magnetic force,

q is the charge of the particle,

v is the velocity of the particle, and

B is the magnetic field strength.

The weight of the proton is given by the formula:

Weight = mass * acceleration due to gravity

Since the proton is moving horizontally, the gravitational force is balanced by the magnetic force. Therefore:

F = Weight

q * v * B = mass * acceleration due to gravity

Given the following constants:

charge of a proton (q) = 1.6 x 10⁻¹⁹ C,

mass of a proton (mass) = 1.67 x 10⁻²⁷ kg

acceleration due to gravity (g) = 9.8 m/s².

Substituting the known values into the equation, we can solve for the magnetic field strength (B):

B = (mass * gravitational acceleration) / (q * v)

B = (1.67 x 10⁻²⁷ kg * 9.8 m/s²) / (1.6 x 10⁻¹⁹ C * 2.50 x 10⁶ m/s)

B = 0.0414 T

Therefore, the strength of the magnetic field required to exactly balance the weight of the proton and keep it moving horizontally is approximately 0.0414 Tesla (T).

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Thus, the total potential is then V_total = \(-1.2 * 10^9V\)

The potential at a point due to a charge is given by V = kQ/r, where k is Coulomb's constant (~\(9x10^9 Nm^2/C^2\)), Q is the charge, and r is the distance from the charge.

The total potential at the center of the square is the sum of the potentials due to each charge.

The distance of each charge to the center is half the diagonal of the square, which is \(\sqrt2 * side/2 = \sqrt2 * \sqrt4.5/2 = 1.5m.\)

The total potential is then V_total

= \(k * [(510^8/1.5) + (210^8/1.5) - (510^8/1.5) - (710^8/1.5)] = -2 * k * 10^8 / 1.5 \\= -1.2 x 10^9 V.\)

Thus, the total potential is then V_total = \(-1.2 * 10^9V\)

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Answer:

333 m

Explanation:

The following data were obtained from the question:

Initial velocity (u) = 0 m/s.

Time (t) = 8.14 s.

Final velocity (v) = 80.79 m/s.

Acceleration due to gravity (g) = 9.8 m/s²

Height (h) =?

v² = u² + 2gh

80.79² = 0 + (2 × 9.8 × h)

6527.0241 = 0 + 19.6h

6527.0241 = 19.6h

Divide both side by 19.6

h = 6527.0241 / 19.6

h = 333 m

Thus, the plane was at a height of 333 m when the package was dropped.

The shift of light toward longer wavelengths indicates that most galaxies are moving away from Earth. More powerful telescopes have made observations of planets orbiting stars other than the Sun.

The percentage change in any economic variable, including the Consumer Price Index (CPI), is typically measured using the following equation:

Percentage Change = ((New Value - Old Value) / Old Value) * 100

This equation calculates the difference between the new value and the old value, divided by the old value, and then multiplied by 100 to express it as a percentage.

To specifically calculate the percentage change in the CPI, you would substitute the respective values of the CPI for "New Value" and "Old Value" in the equation. This allows you to determine the percentage change in the CPI over a given period, indicating the inflation or deflation rate in the economy.

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Answer:

dog

Explanation: