Which changes in an electric motor will make the motor stronger? select 3 options. using a stronger permanent magnet using a weaker permanent magnet increasing current in the electromagnet decreasing current in the electromagnet increasing the distance between the magnets decreasing the distance between the magnets

Answer:

:) :::::::::::::::::::::::::::::::))))

East or west: it remains the same.

North: it increases.

South: it decreases.

At the North pole: it's straight up over your head.

At the equator: it's on the horizon, north of you.

South of the equator: it's below the horizon and you can't see it at all.

Answer:  

C) Plane 1 has more kinetic energy and plane 2 has more potential energy.

Explanation:

he potential energy of an object is determined by its height above a reference level and its mass, while the kinetic energy of an object is determined by its mass and speed.

In this scenario, plane 1 has a higher speed than plane 2, but it is flying at a lower height. On the other hand, plane 2 is flying at a higher height, but it has a lower speed. Since the planes have different heights, they have different potential energies.

Therefore, the correct statement is: C) Plane 1 has more kinetic energy and plane 2 has more potential energy.

Answer:  

C) Plane 1 has more kinetic energy and plane 2 has more potential energy.

Explanation:

he potential energy of an object is determined by its height above a reference level and its mass, while the kinetic energy of an object is determined by its mass and speed.

In this scenario, plane 1 has a higher speed than plane 2, but it is flying at a lower height. On the other hand, plane 2 is flying at a higher height, but it has a lower speed. Since the planes have different heights, they have different potential energies.

Therefore, the correct statement is: C) Plane 1 has more kinetic energy and plane 2 has more potential energy

1. There must have been tectonic activity, including active volcanoes, on the Moon.

A significant rock of the lunar highlands is called lunar anorthosite, which developed as a result of plagioclase flotation in the lunar magma ocean (LMO). A key to understanding the early magmatic history of the terrestrial planets is to place restrictions on the necessary circumstances that led to the creation of a thick pure anorthosite (mode of plagioclase >95 volume%). Plagioclase must have separated from the magma ocean with a low crystal percentage in order to produce pure lunar anorthosite.

The worldwide magma ocean and the formation of a hot, youthful Moon are both suggested by the massive impact theory for the genesis of the Moon. A floatation crust made of plagioclase crystals or anorthosite crust might result from such a magma ocean. Because they anticipated interstitial melt would freeze, early predictions of the projected anorthosite concentration of the lunar highlands crust did not match first observations of Apollo samples, and more subsequent calculations have not matched Clementine measurements or SELENE data. We examine a physical model of a magma ocean with an accumulating floatation lid and discover that, even when credible compaction viscosities are taken into account as a potential inhibitor, considerable melt escape is still possible for appropriate physical parameters and melt migration durations.

This model supports data by allowing more nearly pure lunar anorthosites. This suggests that impact mixing and tidal heating are required to account for the disparity. The model has considerable trouble describing the ejection of melt for the near-surface crust (up to five kilometers in depth).

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The total mechanical energy of the bicyclist is 1400 J, obtained by adding her potential energy of 720 J and kinetic energy of 680 J. The correct answer is option B.

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Answer:

Grounding a Positively Charged Object

Electrons were transferred from the electroscope to the ground. As in the case of grounding a negatively charged electroscope, the grounding of a positively charged electroscope involves charge sharing. The excess positive charge is shared between the electroscope and the ground.

Explanation:

Answer:

Mining is the extraction of valuable minerals or other geological materials from the earth from an orebody, lode, vein, seam, or reef, which forms the mineralized package of economic interest to the miner. Ores recovered by mining include metals, coal, oil shale, gemstones, limestone, dimension stone, rock salt, potash, gravel, and clay.

Explanation:

Answer:

Three resources that are mined from earth's crust are:
-Coal
-Gold
-Iron ore

Some more are:
-Aluminum
-Copper
-Lime
-Phosphate rock
-Gypsum
-Sand
-Gravel
-Rock
etc.

Explanation:

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The expression that correctly represents the kinetic energy, KE, of a car with mass m that possesses momentum of magnitude p is:KE = p²/2mWhere KE is the kinetic energy, m is the mass of the car and p is the momentum of the car.According to the law of conservation of momentum, the momentum of an isolated system of objects that interact is conserved.

When a car is moving with velocity v, its momentum is given by:p = mvwhere m is the mass of the car.In mechanics, the kinetic energy of an object is defined as the energy it possesses due to its motion. The kinetic energy is given by:KE = 1/2mv²However, the question requires the kinetic energy in terms of momentum and mass. To get the kinetic energy in terms of momentum and mass, substitute the expression for momentum, p = mv, into the expression for kinetic energy:KE = 1/2mv²KE = 1/2m(v²)KE = p²/2mTherefore, the expression that correctly represents the kinetic energy, KE, of a car with mass m that possesses momentum of magnitude p is KE = p²/2m.


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20 m/s is the speed of the heavier fragment just after the explosion.

Newton's second law of motion states that the resultant force applied to an object is directly proportional to the mass and acceleration of the object.

F = ma                   where, F = Force (Newton)

                                          m= mass

                                          a = acceleration

Given:

mass of rocket = M = 1500 kg

acceleration of rocket = a = 10 m/s²

elapsed time = t = 2.00 s

mass of lighter fragment = m₁ = m = 500 kg

mass of heavier fragment = m₂ = 2m = 1000 kg

maximum height of lighter fragment = h = 530 m

Let's calculate the final speed of the rocket just before the explosion:

v = u + at

v = 0 + 10(2)

v = 20 m/s

Then, we will calculate the height of the rocket just before the explosion:

\(h' = ut + \frac{1}{2}at^{2}\)

\(h' = 0 + \frac{1}{2} (10)(2.00)^{2}\)

\(h' =20m\)

The initial speed of lighter fragment just after the explosion:

\(v^{2}\)₁ \(= u^{2}\)₁ - \(2g\)Δ\(h\)

\(v^{2}\)₁ \(= u^{2}\)₁ - \(2g\) \((h - h')\)

\(0^{2} = u^{2}\)₁\(- 2(9.8) (530-20)\)

\(u^{2}\)₁\(=9996\)

\(u\)₁ \(=\sqrt{9996} m/s\)

Using Conservation of Momentum Law :

\(M v=m\)₁ \(u\)₁ \(+ m\)₂\(u\)₂

\(1500 (20)= 500(\sqrt{9996} ) + 1000u\)₂

\(u\)₂ ≅ \(- 20 m/s\)

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Your eye as well as the spider's image in the mirror are 1.28 meters apart.

A mirrors is a luminance that reflects light and creates an actual or fictitious picture. An device that returns an image is a reflector or looking glass, which reflects the image of the object when it is positioned in front of it. When focused through an eye or camera lens, light that reflects off a mirror will reveal an image of everything that was in front of it. Mirrors reflect light at an equal but opposite angle, reversing the orientation of the image.

The image distance is equal to the object distance:

Distance between the spider and mirror = 40cm

So, the image is formed 40cm inside the mirror

Distance between the person and mirror = 68cm

Distance between the image and person = 68+40= 128cm

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Answer:

ik what a metaphor is obviously it's not using like or as I'm learning the same thing but one thing I will answer this for u if I would have access to the story thank you

The combination of the compound microscopes and refracting telescopes, operate by magnifying the image.

High levels of magnification are produced by the objective lens and eyepiece lens working together. Multiplying the objective lens' and the eyepiece lens' individual magnifications yields the microscope's overall magnification.

In a refracting telescope, the objective lens and eyepiece lens work together to produce high magnification, which makes distant objects look larger and more distinct to the spectator.

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Option d is Correct. When Sound A's intensity level is 20 dB higher than Sound B's intensity level, Sound B's intensity level is 100 times higher than Sound A's intensity level.

A sound wave's intensity is expressed in decibels (dB), a logarithm with a base of 10. The sound intensity will rise by a factor of 10 for every 10 dB increase in intensity level. The test subject is instructed to assess the two sounds' intensities after being presented with a comparison of their decibel (dB) levels of intensity.

The formula for determining the intensity level in dB is: = 10Log(I/I0), where I is the sound's intensity and I0 is the lowest level of intensity perceptible to human ears. The term "log" refers to the base-10 logarithm.

The intensity levels of two sounds A and B would be A = 10Log(IA/I0) and B = 10Log(IB/I0), respectively, and they could be subtracted to produce B- A = 10Log(IB/IA).

According to the question,

since B is 20 dB louder than A, B- A must equal 20 dB. 20 = 10Log(IB/IA), or Log(IB/IA) = 2, follows. Thus, IB/IA = 102 = 100 is obtained.

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Correct Question:

The intensity level of Sound B is 20 dB greater than the intensity level of Sound A. How many times greater is the intensity level of Sound B than the intensity level of Sound A?

a. 2

b. 10

c. 20

d. 100

Answer:

Explanation:

Divide the total distance traveled by the total time spent traveling. This will give you your average speed. . So if Ben traveled 50 mph for 3 hours, 60 mph for 2 hours, and 70 mph for 1 hour, his average speed was about 57 mph.

The packaging used in the beauty sector is less functional and more ornate.  The packaging waste generated by the cosmetics industry accounts for around 70% of all waste, or 20 billion units annually.

Thus, Lipstick, shampoo, and body wash are discarded after being used up. There is very little recycling. Currently, the oceans get 8 million tonnes of plastic annually and cosmetics.

Since plastic is not biodegradable, it will never decay. Instead, it disintegrates and fragments into miniscule sizes via a process called "photodegradation."  and cosmetics.

The length of this procedure varies based on the type of plastic used, from 100 to 500 years. The more hazardous and challenging it is to clean up, the smaller the plastic becomes.

Thus, The packaging used in the beauty sector is less functional and more ornate.  The packaging waste generated by the cosmetics industry accounts for around 70% of all waste, or 20 billion units annually.

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The arrow that indicates the direction of centripetal force on the object represented by the dot is the arrow that points towards the center of the circle.

Centripetal force is the force that keeps an object moving in a circular path. It always acts towards the center of the circle, which is why the arrow pointing towards the center of the circle represents the direction of centripetal force. In the diagram below, the object represented by the dot is moving in a circular path, and the arrow pointing towards the center of the circle represents the direction of centripetal force:

```
     ^
     |
<-----O----->
     |
     v
```

In conclusion, the arrow that indicates the direction of centripetal force on the object represented by the dot is the arrow that points towards the center of the circle.

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Answer:

C

Explanation:

The arrow labeled C, pointing towards the middle of the circle

Answer: it'S B

Explanation:

The drag force is inversely proportional to velocity squared. Consequently, we may express the force ratio as,

F1 / F2 = V²1 / V²2

We can write values in place of them.

2.3 / F2 = 20² / 35.6²

F2 = 7.29 N

As a result, at 35.6 m/s, our drag will be 7.29 N.

The drag force is the force a solid body experiences while it is moving in relation to a fluid. Drag, for instance, on a moving ship or a flying jet. Thus, a drag force is the resistance a body traveling through a fluid, such as air or water, produces.

One example of the drag force, which is the force that objects experience when moving through a fluid, is air resistance (liquid or gas). Drag force is reactive, like kinetic friction, in that it only exists when an object is moving and it faces away from the direction of the object's motion through the fluid.

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An equation in the point-slope form to find the total distance y Geoff travels after x hours is d(x) = 3.5x + 0.5.

Average speed is important to apprehend the price at which a journey takes place. in the course of an adventure, the speed may vary every so often. if so, locating the average speed turns into critical to have an estimate of the fee at which the adventure is completed.

Speed is the directional speed of an item in motion as an indication of its rate of change in function as found from a specific frame of reference and as measured by a particular well-known time.

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This question can be solved using the equations of motion. There are two scenarios where the equations of motion can be used. The first scenario is the free-fall motion of the piece of bread. The second scenario is the uniformly accelerated motion of the bird.

The acceleration of the bird is  "a = 26.13 m/s²".

First, we will calculate the time taken by the bread to fall 3 m. Using the second equation of motion for this free-fall motion:

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

where,

h = height fall = 3 m

vi = initial velocity = 0 m/s

g = acceleration due to gravity = 9.8 m/s²

t = time taken = ?

Therefore,

\(3\ m = (0\ m/s)t+\frac{1}{2}(9.8\ m/s^2)t^2\\t = \sqrt{\frac{(3\ m)(2)}{9.8\ m/s^2}}\\\\t = 0.78\ s\)

The bird took the same time to catch the bread. Now applying the second equation of motion to the bird's motion:

\(s = v_it + \frac{1}{2}at^2\)

where,

s = distance covered by the bird = 5 m + 3 m = 8 m

vi = initial velocity of the bird = 0 m/s

a = acceleration of the bird = ?

t = time taken = 0.78 s

Therefore, using these values we get:

\(8\ m = (0\ m/s)(0.78\ s)+\frac{1}{2}a(0.78\ s)^2\\\\a = \frac{16\ m}{(0.78\ s)^2}\)

a = 26.13 m/s²

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The charge on the oil drop is 4.93 x 10⁻¹⁵ coulombs.

The charge on the oil drop can be found using the formula:

q = mg(d + b)/V(E + mg/k)

where q is the charge on the oil drop, m is its mass, d is the distance between the plates, b is the radius of the oil drop, V is its volume, E is the electric field strength, g is the acceleration due to gravity, and k is the viscosity of air.

First, we can calculate the mass and volume of the oil drop:

m = (4/3)πr³ρ = (4/3)π(1.000 x 10⁻³ m)³(860 kg/m³) = 3.02 x 10⁻¹⁰ kg

V = (4/3)πr³ = (4/3)π(1.000 x 10⁻³ m)³ = 4.19 x 10⁻¹⁰ m³

Next, we can calculate the force acting on the oil drop due to gravity:

Fg = mg = (3.02 x 10⁻¹⁰ kg)(9.81 m/s²) = 2.96 x 10⁻⁹ N

We can also calculate the viscosity of air:

k = 1.816 x 10⁻⁵ kg/m/s

The electric field strength can be found using the formula,

E = V/d

where V is the potential difference and d is the distance between the plates,

E = (3000 V)/(0.5000 x 10⁻² m) = 6.000 x 10⁵ V/m

The upward force due to the electric field is given by:

Fe = qE

where q is the charge on the oil drop. At terminal velocity, the upward electric force is equal and opposite to the downward force due to gravity, so:

Fe = Fg

qE = mg

Substituting the values we have calculated, we get:

q = (mg)/(E)

q = (2.96 x 10⁻⁹ N)/(6.000 x 10⁵ V/m)

q = 4.93 x 10⁻¹⁵ C

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Answer:

2.27 m/s²

Explanation:

Recall that one of the equations of motion can be expressed as

v² = u² + 2as

where

v = final velocity = takeoff speed = 33m/s

u = initial velocity = rest = 0 m/s

a = acceleration ( we are asked to find this)

s = distance traveled = length of takeoff run = 240m

substituting the known values into the equation above,

v² = u² + 2as

33² = 0² + 2a(240)

1089= 480a

a = 1089/480

a = 2.27 m/s²

ANSWER

2.27 m/s^2

EXPLANATION

We can use the general relationship from kinematics:

vf^2 = vi^2 + 2as

where:

s = distance;

a = acceleration;

vi = 0m/s is the initial velocity;

vf=33ms is the final velocity.

So:

33^2 = 0^2 + 2 ⋅ a ⋅ 240

a= 1089/480

= 2.27m/s^2

Given,

The mass of the car, m=1000 kg

The velocity of the car, v=20 m/s

The kinetic energy of an object is the energy of the body possessed due to its motion. The kinetic energy of a body is directly proportional to the square of the velocity of the object.

The kinetic energy of the car is given by,

On substituting the known values,

Thus the kinetic energy of the given car is 200 kJ.

Answer: A

Explanation:

the acceleration is constant and gravity causes the ball to fall downwards.

hope this helps

The correct HTML for creating a drop-down list is to use the `<select>` element along with the `<option>` elements. Here's an example:

\(```html < select > < option value="option1" > Option 1 < /option > < option value="option2" > Option 2 < /option > < option value="option3" > Option 3 < /option > < /select > ```\)

In this example, the `<select>` element represents the drop-down list itself, and each `<option>` element represents an item within the list. The `value` attribute specifies the value associated with each option, while the content within the `<option>` tags represents the visible text for each item.

When a user interacts with the drop-down list, they can select one of the options. The selected option's value can then be retrieved using JavaScript or submitted as part of a form submission.

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Answer:

125,000

Explanation:

Answer:

2120000m^2

Explanation:

1300* 1660 and there is 3 significant figures, so the 9 would make the  round to a 2.