The fact that the galaxies are rotating at about the same velocity from the center to the edge as opposed to faster near the centers is evidence that.
a. There must be more gravity than that calculated from normal Mass
b. They are rotating slower over time
c. Dark energy is pulling on them
d. They are measuring the velocities incorrectly ​

Answer:

ANSWER BELOW I

                             I

                            V

Remember that w=mg where w is weight in Newtons, m is mass in kilograms, and g is gravity in

m/s2

. For example, for Earth, 445 N = 45.4 × 9.8

m/s2

:Notice that the x-axis values will be gravity in

m/s2

, which is already given in the table, and the y-axis values will be the weight in Newtons. Remember to round your weights to a whole number, and to enter the points starting with the lowest gravity (moon, then Mars, then Venus, then Earth).

The fundamental frequency of the tube open at both ends is 365.25 Hz.

The fundamental frequency of a tube open at both ends can be calculated using the formula:

f = (n * c) / (2 * L)

where:

f = fundamental frequency (in Hz)

n = harmonic number (for the fundamental frequency, n = 1)

c = speed of sound (in m/s)

L = length of the tube (in meters)

Given:

L = 0.472 m

c = 344 m/s

n = 1

Using the formula:

f = (1 * 344) / (2 * 0.472)

f = 365.25 Hz (rounded to two decimal places)

Therefore, the fundamental frequency of the tube open at both ends is 365.25 Hz.

The fundamental frequency, also known as the first harmonic, is the lowest frequency at which a system or object vibrates. It is the frequency at which a system oscillates when all of its parts are moving in simple harmonic motion. The fundamental frequency is important in various fields, including music, acoustics, and physics.

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We can find direction by electric field diagram and magnitude remain the same despite of a change in positions.

When a proton is placed at point A and an electron is placed at point B, the direction of the electric force F is determined by the electric field line diagram. The electric force between the two charges is a vector force, which means it has both a magnitude (strength) and a direction.

The magnitude of the electric force F between a proton and an electron is determined by Coulomb's Law, which states that the magnitude of the force between two charges is in direction proportion to charges' product and in inverse proportion with their distance squared.

to the product of the two charges and inversely proportional to the square of the distance between them. Thus, the magnitude of the electric force F between the charges is independent of the direction, so the magnitudes of the electric force F between a proton and an electron, regardless of their positions, will always be the same.

The direction of the electric force F, however, is determined by the electric field line diagram. In the diagram, the electric force F is directed away from the positive charge (the proton) and toward the negative charge (the electron). Therefore, the electric force F will be directed away from point A and toward point B, making the angle relative to the +x axis clockwise, with a positive angle.

In summary, the magnitude of the electric force F between a proton and an electron will remain the same regardless of the positions of the particles, while the direction of the electric force F will be determined by the electric field line diagram, with the angle relative to the +x axis clockwise, with a positive angle.

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Answer:

c

Explanation:

gfdschhgfdxcvhgfd

Answer:

b. Decreasing the number of coils of wire wrapped around the nail

it can cause an electrical current running through it creates a magnetic field.

The total magnification will be 200x.

It quantifies the comparison of the image's size to that of the object's size. In terms of how big or little the picture is produced, it informs us about the image. The height of the picture divided by the height of the object is known as magnification. m=hiho.

Objective lens - An essential component of the microscope's optics is the objective lens. The sample, specimen, or item being examined is situated close to the microscope's objective. It plays a crucial part in imaging since it creates the initial magnified picture of the sample.

Ocular lens - The component of the microscope known as the eyepiece, or ocular lens, is responsible for enlarging the picture created by the objective so that it can be viewed by the human eye.

20x objective lens was used by specimen

10x ocular lens was also used by him.

we have to find the total magnification.

For calculating the total magnification we 'll simply do multiplication

Total Magnification = 20 × 10x

Total Magnification = 200x

So , the total magnification will be 200x .

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The answer is option c - It will divide in half to form two new cells..

Explanation:

The sentence that best describes what happened during cell growth is ;

( D ) It will become larger by taking in nutrients

As the yeast cells begin to grow ( i.e. cell growth ), they will require more nutrients and as they take in the necessary nutrients they will gradually increase in size ( becoming larger ) which is a vital sign of cell growth and development, which will be seen in the yeast cells as they undergo cell growth.

The production of offsprings with a mate does not describe an activity that occurs in cell growth.  

Hence we can conclude that The sentence that best describes what happened during cell growth is, It will become larger by taking in nutrients.

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The definition that best helps readers find the correct meaning of "principal" in this sentence is: "Principal - noun: the person with the highest authority or most important position in an organization, institution, or group."

In the given sentence, the word "principal" is used as a noun, referring to a person. The context indicates that the booster club has a specific objective, which is to raise money for new marching band uniforms. Therefore, it is logical to infer that "principal" in this sentence refers to a person who holds the highest authority or most important position in the booster club. This person would play a crucial role in leading the club, making decisions, and overseeing the fundraising efforts.

By understanding the definition of "principal" as the person with the highest authority or most important position, readers can grasp the intended meaning of the sentence and recognize the key objective of the booster club.

In the given sentence, the word "principal" refers to the person with the highest authority or most important position in the booster club. This understanding aligns with the objective stated, which is to raise money for new marching band uniforms.

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Answer:

Explanation:

Samantha walks along a horizontal path in the direction shown the curved path is a semi circle with a radius of 2 m while the horizontal part is for me what is the magnitude of displacement

Displacement is given by the straight line distance between P and Q. Displacement will be length of straight line joining P and Q

a semi circle with a radius of 2 m

Length of this straight line=4+diameter

=4+(2*2)

=8 m

In order to calculate the work done, we can use the formula below:

Where W is the work done (in J), F is the force (in N) and d is the distance (in m).

Since the boy is going up the stairs, the force is equal to his weight force:

Now, calculating the work, we have:

Therefore the correct option is B.

Answer:

Explanation:t f t f t

Answer:

2300 because 800 + 1500=2300

The mass that the balloon needs to continue to float is the place where it is balanced at 20 g.

The buoyancy principle, which is based on Archimedes' theory, is what causes a balloon to float. An object submerged in a fluid receives an upward buoyant force equal to the weight of the fluid it displaces, according to Archimedes' principle.

The gas within a balloon, which is commonly helium or hydrogen, is lighter than the air around it. When the balloon is inflated with this gas, which is lighter than air, it expels as much air as it weighs.

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The focal length of the cornea of a normal human eye is approximately 44.06 centimeters.

The focal length of the cornea of a normal human eye with an optical power of +44.0 diopters can be calculated using the formula:

focal length (in meters) = 1 / optical power (in diopters)

Converting diopters to meters^-1, we get:

+44.0 diopters = 0.0227 meters^-1

Plugging this value into the formula, we get:

focal length = 1 / 0.0227 meters^-1

focal length = 44.06 centimeters

Therefore, the focal length of the cornea of a normal human eye is approximately 44.06 centimeters.

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Answer:

Energy

Explanation:

Edge 2021

As part of his special theory of relativity, Einstein saw mass as a form of energy.

The theory of relativity as stated by Einstein stated that mass and energy are both interconvertible. This explains why energy is released when mass is lost.

Thus, as part of his special theory of relativity, Einstein saw mass as a form of energy.

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¡Hello!

Topic: Electrostatic

For calculate electric force, we can apllicate formula:

                                                \(\boxed{\boxed{\bold{F = k * \frac{q*q'}{r^{2} } } } }\)

\(\sqrt{\) F = Electric Force

\(\sqrt{\) k = Coulomb Constant = 9x10^9

\(\sqrt{\) q = Charges = 1 C

\(\sqrt{\) r = Distance = 3000 m

Let's replace according the information, and let's resolve it:

F = 9x10^9 * (1 * 1) / 3000²

F = 9x10^9 * 1 / 9000000

F = 9x10^9 * 1.1111111e-7

F = 1000 N

Result:

The electric force is of 1000 N

Good luck

Answer:

3.11×10¯¹¹ N

Explanation:

From the question given above, the following data were obtained:

Charge 1 (q₁) = 6×10¯¹⁰ C

Charge 2 (q₂) = 2.3×10¯¹⁵ C

Distance apart (d) = 2 cm

Force (F) =?

Next, we shall convert 2 cm to metre (m). This can be obtained as follow:

100 cm = 1 m

Therefore,

2 cm = 2 cm × 1 m / 100 cm

2 cm = 0.02 m

Thus, 2 cm is equivalent to 0.02 m

Finally, we shall determine the electrical force between the two charge as follow:

Charge 1 (q₁) = 6×10¯¹⁰ C

Charge 2 (q₂) = 2.3×10¯¹⁵ C

Distance apart (d) = 0.02 m

Coulomb constant (K) = 9×10⁹ Nm²C¯²

Force (F) =?

F = Kq₁q₂ / d²

F = 9×10⁹ × 6×10¯¹⁰ × 2.3×10¯¹⁵ / 0.02²

F = 1.242×10¯¹⁴ / 0.0004

F = 3.11×10¯¹¹ N

Therefore, the electrical force between the two charge is 3.11×10¯¹¹ N

Answer:

To find the volume of a rectangular object, measure the length, width and height. Multiply the length times the width and multiply the result by the height. The result is the volume. Give the result in cubic units, such as cubic centimeters.

Explanation:

Answer:

Kinetic energy is the energy possessed by an object due to its motion. If an object is moving, then it has kinetic energy. The amount of kinetic energy depends on mass and speed.

Explanation:

The work done is 1350. Option C is correct. The work-energy theorem is applied to a given problem.

From the work-energy theorem, it is stated that the net work done is equal to the change in the kinetic energy.

\(\rm W_{net}=K_f-K_i \\\\ \rm W_{net}=\frac{1}{2}mv_f^2-\frac{1}{2} mv_i^2 \\\\ W_{net}=\frac{1}{2} m(v_f^2-v_i^2)}\)

Substitute the given value;

\(\rm W_{net}=\frac{1}{2} \times 60 \times (9.00^2-6.00^2)} \\\\ W_{net}=1350 \ J\)

The work done is 1350 J.

Hence option C is correct.

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Answer:

C on edge

Explanation:

1,350 J

The quantity of outlets that must be installed on each of the branch circuits has no set maximum.

Technically, a 15 amp circuit breaker may support any number of outlets. A good guideline is 1 outlet per 1.5 amps, up to 80% of the circuit breaker's capability. As a result, we advise no more than 8 outlets on a 15 amp circuit. You see, the number of outlets that can be installed on a single 20 amp circuit is not explicitly capped by the National Electrical Code (NEC). A lighting and appliance branch circuit panelboard may have up to 42 overcurrent devices fitted (excluding the main device), in accordance with NEC.

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Answer:

the vertical velocity is constant.

Explanation:

The horizontal velocity of a projectile is constant (a never changing in value), There is a vertical acceleration caused by gravity; thus, the vertical velocity of a projectile changes. and the horizontal motion of a projectile is independent of its vertical motion.

Answer:

A ( Jack did twice as much work as Jill

Explanation:

Answer:

c) The balls have the same velocity after the collision

Explanation:

In a perfectly inelastic collision between two balls, there is a loss in the maximum kinetic energy of the system and the two ball stick together, and thereby have the same velocity after the collision and also the coefficient of restitution of the two balls is also zero accompanied by a loss in the kinetic energy of the system

Therefore, the correct option is that both balls will have the same (equal) velocity after the collision.

The average power supplied by the voltage source in the L-R-C circuit is given by Pavg = V₀² / (2 × R) this expression in the V₀ and R form.

In an ideal L-R-C circuit driven by a sinusoidal voltage source V₀cos(ωt), the power dissipated in the resistor (P(R)) can be calculated as follows:

P(R) = I(RMS)² × R

where I(RMS) is the root mean square (RMS) value of the current through the resistor, and R is the resistance of the resistor.

At the resonant frequency (ω), the inductive reactance (XL) and capacitive reactance (XC) cancel each other out, resulting in a purely resistive circuit. Therefore, the current is in phase with the voltage.

The RMS current (I(RMS)) can be calculated using Ohm's law:

I(RMS) = V(RMS) / R,

I(RMS) = V₀ / (√(2) × R).

Now, we can calculate the average power supplied by the voltage source:

Pavg = P(R)

= I(RMS)² × R

= (V₀ / (√(2) × R))² × R

= V₀² / (2 × R).

Therefore, the average power supplied by the voltage source in the L-R-C circuit is given by Pavg = V₀² / (2 × R).

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ANSWER:

Answer:

Srry !!!

Explanation:

Image is not clear.

3.5 s is the  time elapses from when the rock is thrown until it hits the street when thrown vertically upward.

Every area of our lives is impacted by the concept of time. It determines the duration of an event and the tempo of our daily activities. Time begins to move forward as soon as we open our eyes in the morning, reminding us of the obligations we have to fulfil and the dates we have to meet. We use time to organise our lives, prepare our calendars, communicate with others, and plan events. Time is an elusive and philosophical term that defies simple explanations despite the many ways it forms and affects our life. It passes in the blink of an eye while also appearing to go on forever. It is both finite and endless.

\(mgh = \frac{1}{2}mv^2 + mgh_{\text{roof}}\)

v =\(\sqrt{2gh}\)

  = \(\sqrt{2(9.81\ \text{m/s}^2)(28\ \text{m})} \approx \boxed{18.8\ \text{m/s}}\)

h =\(\frac{1}{2}gt^2\)

t =\(\sqrt{\frac{2h}{g}}\)

=\(\sqrt{\frac{2(28\ \text{m})}{9.81\ \text{m/s}^2}} \approx \boxed{3.5\ \text{s}}\)

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