HELLO CAN SOMEONE PLEASE ANSWER THIS !!!
How is a conductor different from an insulator?

1: Conductors do not have magnetic fields; insulators do have magnetic fields.
2: In a conductor, electric current can flow freely; in an insulator, it cannot flow freely.
3: In a conductor, electric current cannot flow freely; in an insulator, it can flow freely.
4: Conductors have magnetic fields; insulators do not have magnetic fields.

The required order of circular velocities, from smallest to largest is calculated to be d < a < c < b, where, a, b, c, d are the given options.

The velocity equation for the objects moving in circular motion is given by the equation,

v = √(G m/r)

where,

v is the velocity

G is the Gravitational constant

m is the mass of the object

r is the radius of the orbit

a. A 5 kg object halfway to the Moon circling the Earth

In this case, the radius of the orbit is the half of the distance between the Earth and the moon.

r = distance between earth and moon/2 = 384400000 m/2 = 192200000 m

So, v₁ = √(G m/r) = √(6.67408× 10⁻¹¹ × 5/192200000) = 1.317 × 10⁻⁹ m/s

b. A 10-kilogram object is circling the planet just above its surface

The orbit's radius is similar to the size of the planet Earth.

r = r earth = 6371000 m

So, v₂ = √(G m/r) = √(6.67408× 10⁻¹¹ × 10/6371000) = 1.02 × 10⁻⁸ m/s

c. A 15 kg object circling the Earth at a distance equal to that of the Moon

r = distance between the earth and the moon = 384400000 m

So, v₃ = √(G m/r) = √(6.67408× 10⁻¹¹ × 15/384400000) = 1.61 × 10⁻⁹ m/s

d. A 20 kg object that is circling the Earth and is one-quarter to the Moon

r = 1/4(distance between the earth and the moon) = 384400000 m/4 = 96100000 m

So, v₄ = √(G m/r) = √(6.67408× 10⁻¹¹ × 20/96100000) = 1.17 × 10⁻⁹ m/s

Thus, v₄ < v₁ < v₃ < v₂. And the order of options are d < a < c < b.

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Answer:

B

Explanation:

The smallest value of the force that will make the block not to slide down is 10 N.

We'll begin by calculating the normal reaction. This can be obtained as follow:

N = mg

N = 8 × 10

N = 80 N

Finally, we shall determine the frictional force.

F = μN

F = 0.4 × 80

F = 32 N

Since the frictional force is 32 N, therefore, a force lesser than the frictional force will make the block not to slide down.

From the options given above, only option A has a force that is lesser than the frictional force.

Therefore, the correct answer to the question is Option A. 10 N

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Answer:

B

Explanation:

.....50N-20N =30N ...

Answer:

B.  30 N to the right

Explanation:

The weight of the car, 2500 N, is pushing down while the road is pushing up with a force of equal magnitude. Those forces cancel each other out. The car is being pushed to the left with a force of 20 N and to the right with a force of 50 N. Thus, the cumulative force is 30 N to the right.

Answer:

a molecule is an electrically neutral group of two or

more atoms held together by chemical bonds

Explanation:

Answer:

It can be two or more of the same elements combined together.

It can be one element by itself.

Explanation:

14m/s fasts must you drive so that the force of the wall on the box equals the weight of the box.

Centripetal Force = Weight of the Block

=m\(v^{2}\)/r = mg

Therefore,

=v = √(rg)  

=v = 14 m/sec

A centripetal force (from Latin centrum, "middle" and petere, "to are searching for") is a force that makes a frame observe a curved course. Its course is usually orthogonal to the movement of the frame and in the direction of the fixed point of the instantaneous middle of curvature of the path. It is "a pressure by means of which bodies are dragged or driven, or in any other manner typically tend, in the direction In Newtonian mechanics, gravity presents the centripetal force causing astronomical orbits.  

One commonplace instance concerning centripetal pressure is the case in which a frame actions with uniform speed alongside a round route. The centripetal force is directed at right angles to the motion and alongside the radius toward the Centre of the round route. The mathematical description was derived in 1659 via the Dutch physicist Christiaan Huygens.

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If the resistor in a simple circuit is replaced with another resistor that has 75% lower conductivity, the current (I) in the circuit would decrease.

In a simple circuit, the current flowing through a metallic resistor is determined by Ohm's Law, which states that the current (I) is directly proportional to the voltage (V) applied across the resistor and inversely proportional to the resistance (R) of the resistor (I = V/R).

When the resistor is replaced with another resistor that has 75% lower conductivity, it means that the new resistor has a higher resistance compared to the original resistor. Since resistance is in the denominator of the current equation, an increase in resistance leads to a decrease in current.

Therefore, the current (I) in the circuit would decrease when the resistor with lower conductivity is introduced. This relationship between resistance and current is consistent with Ohm's Law, which establishes the fundamental relationship between voltage, current, and resistance in a circuit.

By manipulating the resistance value, the current flowing through the circuit can be controlled.

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Answer:

2292W

Explanation:

Use the formula for energy first:

\(E=D*M\)

Where E = Energy || D = Distance || M = Mass.

Solve that equation:

E = 5 * 5500    ==>     27500J

To find power, divide energy per time:

27500J / 12s =~  2292W

Did it in a rush, any problems message me

Answer: If you apply force to an object the velocity changes. But it doesn't work the other way around apply velocity and the force (no!)  Velocity does not change on an object.   A force pushes or pulls on an object, but velocity is simply something an object has I hope this makes sense to you. Hope this helps :)

Explanation:

It takes 14,700 joules to remove half of the water from the aquarium.

To find the work required to remove half of the water from the aquarium, we can use the following formula:

W = F * d

where W is the work, F is the force, and d is the distance the force travels is applied.

First, we need to find the weight of the water in the aquarium. The weight of an object is equal to its mass relative to the acceleration of gravity (g). The density of water is about 1000 kg/m^3.

volume of water in aquarium = 3 m * 1 m * 1 m = 3 m^3

mass of water in aquarium = density * volume = 1000 kg/m^3 * 3 m^3 = 3000 kg

weight of water in aquarium = mass * g = 3000 kg * 9.8 m/s^2 = 29400 N

To remove half of the water, we need to raise it to a height of 0.5 m (because the aquarium is 1 m deep). The force required to lift the water is equal to its weight, which we calculated above. The distance over which the force is applied is the height the water rises, so 0.5 m.

So, the work required to remove half of the water from the aquarium is:

W = F * d = 29400 N * 0 .5 m = 14700 J

Therefore, the work to remove half of the water from the aquarium is 14700 Joules.

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Michelson-Morley experiment helped present-day scientists by explaining how light travels through space and time.

This is referred to as a procedure which is carried out by scientists in other support or refute a hypothesis and an example of such is the Michelson-Morley experiment which helped explain some properties of light.

This experiment was able to explain how light travels in different media and the velocity in which such occurs. It was also discovered that light has a constant speed of light which helped to establish different mathematical relationships between various parameters and helped  present-day scientists discover more.

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Mitosis is divided into five distinct stages: prophase, prometaphase, metaphase, anaphase, and telophase. It is the process by which cells divide and replicate in order to produce two identical daughter cells.

The first stage of mitosis is prophase. During this stage, the chromosomes become visible and the nuclear envelope breaks down. The centrioles begin to move to opposite ends of the cell and the spindle fibers start to form. The chromosomes also condense and become shorter and thicker.

The second stage of mitosis is prometaphase. During this stage, the spindle fibers attach to the chromosomes and the chromosomes begin to move towards the center of the cell.

The third stage of mitosis is metaphase. During this stage, the chromosomes line up in the center of the cell in an orderly fashion, known as the metaphase plate.

The fourth stage of mitosis is anaphase. During this stage, the sister chromatids separate and move to opposite ends of the cell. The spindle fibers continue to move the chromosomes until they reach the opposite poles.

The fifth and final stage of mitosis is telophase. During this stage, the nuclear membrane reforms around the two sets of chromosomes that have moved to opposite ends of the cell. The chromosomes start to uncoil and new nucleoli are formed. The cell then divides in two and the two daughter cells move away from each other.

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Answer:

The gravitational potential energy is 150J

Explanation:

P. E=mgh

=5*10*3

i was wrong sorry

Explanation:

Answer:

it is relatively weak distance Force

ordered from strongest to weakest the forces are 1) the strong nuclear force, 2) the electromagnetic force, 3) the weak nuclear force, and 4) gravity

Answer:

Typically found in eukaryotic cells, centrioles are cylindrical (tube-like) structures/organelles composed of microtubules. In the cell, centrioles aid in cell division by facilitating the separation of chromosomes. For this reason, they are located near the nucleus.

Answer:

sorry im just gettig points but the actaul anserw is on top of this oneExplanation:

Bye

Normal atmospheric pressure is enough to support a column of mercury approximately 760 millimeters high.  A barometer measures atmospheric pressure.

What is atmospheric pressure?

The pressure exerted by the Earth's atmosphere on the surface of the Earth is known as atmospheric pressure. The weight of the Earth's atmosphere produces this pressure. Atmospheric pressure is proportional to the altitude at which it is measured, which means that atmospheric pressure decreases as altitude rises.

What is the formula for atmospheric pressure?

The formula for atmospheric pressure is P = F/A. In this formula, P represents pressure, F represents force, and A represents area. The unit of pressure is pascal (Pa) or N/m2 in the metric system, while the unit of force is newton (N) and the unit of area is meter square (m2).

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The mass of the Skater is 50 Kg.

We have a skater who is under the influence of 30 Newton of force.

We have to determine the mass of skater.

Newton's second law of motion states that the rate of change of momentum is directly proportional to the force applied. Mathematically-

\($F\;\alpha \; \frac{dp}{dt}\)

According to the question, we have -

Force on Skater -  30 N

Acceleration Produced -  0.6 \(m/s^{2}\)

We know -

F = ma

30 = m x 0.6

m = 30/0.6 = 50 Kg

Hence, the mass of the Skater is 50 Kg

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Answer:

Impulse=18Ns

Explanation:

Impulse= force*time

Plug in known values...

I=6N*3s

I=18Ns

The impulse  produced by the force is 18Ns

What is Impulse?

Given:

F= 6.0N

t= 3.0 s

On substituting these values in the above formula:

\(I=6N*3s\\ \\I=18Ns\)

Thus, The impulse  produced by the force is 18 Ns.

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Answer:

The drawdown in a confined aquifer under transient conditions can be estimated using the Theis solution for the non-equilibrium radial flow of water. This solution is given by:

s = Q / (4πT) * W(u),

where s is the drawdown, Q is the pumping rate, T is the transmissivity, and W(u) is the well function (also called the Theis function) which depends on the variable u, where:

u = r²S / (4Tt),

where r is the distance from the pumping well and t is the time since pumping began.

Given T = 2500 m²/day, S = 1.0 x 10-3, and Q = 500 m³/day, we can calculate the drawdown at 10 m (r1 = 10 m) and 50 m (r2 = 50 m) for t = 150 days.

For (i) r1 = 10 m:

u1 = r1²S / (4Tt) = (10 m)² * 1.0 x 10-3 / (4 * 2500 m²/day * 150 days) = 0.000667

s1 = Q / (4πT) * W(u1) = 500 m³/day / (4π * 2500 m²/day) * W(0.000667).

For (ii) r2 = 50 m:

u2 = r2²S / (4Tt) = (50 m)² * 1.0 x 10-3 / (4 * 2500 m²/day * 150 days) = 0.01667

s2 = Q / (4πT) * W(u2) = 500 m³/day / (4π * 2500 m²/day) * W(0.01667).

Explanation:

Unfortunately, the well function W(u) cannot be evaluated directly without more specialized knowledge or tools. The well function is related to the exponential integral function, which requires numerical computation. You would typically use a table of values, a calculator with this function, or a computer program to evaluate it. After obtaining W(u), multiply it by the remaining fraction to find the drawdowns.

The statement that must be true of an extended body experiencing a net force of zero is that the center of mass of the extended body is not accelerating.

When an extended body experiences a net force of zero, it means that the vector sum of all the forces acting on the body is zero. According to Newton's second law of motion, F = ma, where F is the net force, m is the mass, and a is the acceleration. Since the net force is zero, the acceleration of the body is also zero. In an extended body, different parts of the body may experience different forces, causing them to accelerate or decelerate. However, the center of mass of the body represents the point where the body's total mass is concentrated. If the net force is zero, the center of mass remains at rest or moves with a constant velocity, indicating that it is not accelerating.

Therefore, the correct statement is that the center of mass of the extended body is not accelerating.

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Answer:

k and...

Explanation:

Answer:

no thank you.

explanation: Do not want to

The term "musical notation" refers to the widespread symbology used to indicate how far apart long and short sounds should be from one another.

a collection of visual instructions for performing music, a visual representation of a heard or imagined musical sound, or musical notation. It usually takes the form of writing or printing and is a deliberate, comparatively time-consuming activity. One of two purposes—as a memory aid or for communication—causes its use.

Typically, Western music employs 12 notes: C, D, E, F, G, A, B, plus five flats and comparable sharps in between: C sharp/D flat (they are the same note, simply referred to differently depending on the context).

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The horizontal speed of Sam in order to clear that one kid is 6.67 m/s.

The time taken for Sam to fall from the given height is calculated as follows;

h = vt + ¹/₂gt²

where;

h = 0 + ¹/₂gt²

t = √ ( 2h / g )

t = √ ( 2 x 7 / 9.8 )

t = 1.2 seconds

The horizontal speed of Sam in order to clear that one kid is calculated as;

Vx = X / t

Vx = ( 8 m ) / (1.2 s )

Vx = 6.67 m/s

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The Effect of Gamma Rays on Man-in-the-Moon Marigolds is Paul Zindel ’s best-known play.

The γ-rays mainly scatter off electrons within materials, and they randomly penetrate to some variable depth of material before their interaction. Scattering of γ-rays is itself a random process with a wide spectrum of possible results, averaging to the distributions presented above when many interactions are summed.

The individual fate of a γ-ray photon in a material is not predictable. Moreover, scattering of incident γ-ray photons will generally be incoherent, i.e. the scattered photons are unrelated, and do not form, e.g., patterns of diffraction.

The wave description of electromagnetic interactions with matter is inappropriate; we apply a particle interaction model instead.Photoelectric absorption: Atomic electrons are removed from their nuclei, thus reducing the energy of the γ-ray photon by the electron’s binding energy. This is the dominant process at energies below 100 keV.

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Answer:

v (speed) = S / t = 4 * 400 m / (6 * 60 sec) = 4.4 m/s

The average velocity  is zero because there is no net vector displacement.

Answer:

A- Her speed is 4.4 m/s, and her velocity is 0 m/s.

It is in the process of melting into water. Some of the water will be liquid and some will be solid. The temperature of the water will not change while it’s in B.

A heating curve is a graphical representation of the change in temperature of a substance as heat is added to it. It shows how the temperature of a substance changes as it is heated at a constant rate. The heating curve consists of a horizontal line for each phase change, where the temperature remains constant, and a sloped line for each temperature increase during a phase.

The curve is typically plotted with temperature on the y-axis and the amount of heat added on the x-axis. Heating curves are useful for understanding the behavior of substances as they change from one state to another and can be used to calculate the amount of heat required to cause a phase change or to raise the temperature of a substance to a specific point.

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Answer:

Voltage.

Explanation: