Predict what happens to the mechanical advantage of a machine if friction is reduced through the use of oil or some other means.

Because the moon's orbit tilts 5 degrees relative to Earth, eclipses only occurred only when moon crosses the ecliptic throughout a full or new moon. The Moon is then either above or below the ecliptic plane, which is the plane of Earth's orbit around the Sun. The Sun, Moon, and Earth are aligned to cause an eclipse only when the Moon's orbit crosses the ecliptic plane.

An eclipse of the Sun (or solar eclipse) may only occur during the New Moon, when the Moon passes between the Earth and the Sun. If the Moon's shadow falls upon the Earth's surface at that time, a piece of the Sun's disk will be obscured or 'eclipsed' by the Moon.

FULL MOON

When the moon is 180 degrees from its position during the new moon, the sun, Earth, and moon form a line. Full moon occurs when the moon's disk is as close as possible to being completely lit by the sun.

There is one full Moon per lunar cycle, which lasts 29.5 days. However, not every full Moon is a supermoon; only three or four occur annually on average. Between 2020 and 2025, each year will have four.

Because our brains contain a substantial source of water, Dutch researchers suspect that the Moon's gravitational pull could also have an influence on your brain, creating erratic behavior, in the same way that the Moon is responsible for the ebb and flow of tides.

NEW MOON

The new moon occurs when the Moon is between the Earth and the Sun, and so the shadowed side of the Moon faces the Earth. The full moon night is known as Purnima, while the new moon is known as Amavasya.

The new Moon is usually recognized as a period for initiating new endeavors. Keep in mind that when the new Moon occurs, not only does it initiate a new cycle, but it also concludes the previous phase.

This cycle has been split down by astronomers into four primary Moon phases: the New Moon, First Quarter, Full Moon, and Last Quarter. Additionally, there are four secondary phases: the Waxing Crescent, the Waxing Gibbous, the Waning Gibbous, and the Waning Crescent.

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Answer:

1.) The 1ˢᵗ three term is (-32), (-7) and 18

2.) The 1ˢᵗ three term is 127, 106 and 85

Step-by-step explanation:

Here,

First Term = a₁ = - 32

Common Difference = (d) = 25

Now, For 1ˢᵗ three term,

n = 1

a₁ = - 32

n = 2

aₙ = a + (n - 1)d

a₂ = (-32) + (2 - 1) × 25

a₂ = (-32) + 1 × 25

a₂ = (-32) + 25

a₂ = -7

n = 3

aₙ = a + (n - 1)d

a₃ = (-32) + (3 - 1) × 25

a₃ = (-32) + 2 × 25

a₃ = (-32) + 50

a₃ = 18

Thus, The 1ˢᵗ three term is (-32), (-7) and 18

Here,

First Term = a₁ = 127

Common Difference = (d) = -21

Now, For 1ˢᵗ three term,

n = 1

a₁ = 127

n = 2

aₙ = a + (n - 1)d

a₂ = 127 + (2 - 1) × (-21)

a₂ = 127 + 1 × (-21)

a₂ = 127 - 21

a₂ = 106

n = 3

aₙ = a + (n - 1)d

a₃ = 127 + (3 - 1) × (-21)

a₃ = 127 + 2 × (-21)

a₃ = 127 - 42

a₃ = 85

Thus, The 1ˢᵗ three term is 127, 106 and 85

-TheUnknownScientist

Answer:

See below!

Explanation:

Force = F = 50 N

Angle = θ = 38.8°

Horizontal and vertical components of force = ?

\(F_x=Fcos \theta\\\\F_y=Fsin \theta\)

Horizontal component of force:

\(F_x=(50)cos38.8\\\\F_x=(50)(0.77)\\\\F_x\approx 38.9\)

Vertical component of force:

\(F_y=(50)sin(38.8)\\\\F_y=(50)(0.62)\\\\F_y\approx 31.3\\\\\rule[225]{225}{2}\)

Someone pressed the "Hold" button. If you press it again, the multimeter should work correctly.

When the "Hold" button is pressed on a multimeter, it temporarily freezes the measurement value displayed on the screen, even if the voltage being measured changes. This can be useful if you want to take note of a specific reading without having to continually look at the screen. If the value stays at 0.00 V and an "H" is displayed, it is likely that the "Hold" button has been pressed, and pressing it again should release it and allow the multimeter to display accurate voltage readings.

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Answer:

A.) r = 2t

B.) V = 33.5t^3

Explanation:

Given that a spherical balloon is being inflated and the radius of the balloon is increasing at a rate of 2 cm/s

A) Express the radius (r) of the balloon as a function of the time (t).

Since the rate = 2 cm/s that is,

Rate = radius/ time

Therefore,

2 = r/t

Make r the subject of formula

r = 2t

(B) If V is the volume of the balloon as a function of the radius, find V or and interpret it.

Let assume that the balloon is spherical. Volume of a sphere is;

V = 4/3πr^3

Substitute r = 2t into the formula

V = 4/3π(2t)^3

V = 4/3π × 8t^3

V = 32/3 × πt^3

V = 33.5t^3

Answer:

option (b) charge

Explanation:

The number of joules per coulomb for 120-volt circuit is 120 joules/C.

The amount of energy transferred to each unit of charge is given by the voltage or potential difference between two points.

The unit of potential difference is the volt, which is equivalent to one joule per coulomb.

So if we have a 120-volt circuit, each coulomb of charge that flows between two points receives 120 joules of energy.

Energy per unit charge = Potential difference

= 120 volts

= 120 joules/coulomb

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The gravitational acceleration at an altitude of 1000 km is approximately 7.05 m/s².

At an altitude of 1000 km above Earth's surface, the acceleration due to gravity decreases. To calculate the gravitational acceleration at this altitude, we can use the formula:

a = g ² (R / (R + h))²

where:

a: gravitational acceleration at the given altitude

g: acceleration due to gravity at Earth's surface = 9.80 m/s²

R: radius of Earth ≈ 6,371 km

h: altitude above Earth's surface = 1000 km

Plugging in the values, we get:

a = 9.80 ² (6371 / (6371 + 1000))²

Calculating this, we find:

a ≈ 7.05 m/s²

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In that, it states that similar poles repel, unlike poles attract and that the force is proportional to the inverse square of the distance between two poles.

The pushing or tugging of an object is considered to be exerting force. Whenever two things interact, push and pull are the result. Stretching and crushing are further examples of force expressions.

An external agent known as a force has the power to alter a body's state of rest or motion. There is a direction and a magnitude to it. When applying force, it is important to consider both the direction of the force and the actual application of the force.

You should emphasize this as the main point of your education at this level because a push or a pull is referred to as a force. In our daily lives, forces appear in many different ways.

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The time spent in the air by the ball at the given momentum is 6.43 s.

The given parameters;

The impulse experienced by the ball is calculated as follows;

\(Ft = \Delta P\)

where;

\(Ft\) is impulse

\(\Delta P\) is change in momentum

The time of motion of the ball is calculated as follows;

\(t = \frac{\Delta P}{F} \\\\t = \frac{0.9 - 0}{0.14} \\\\t = 6.43 \ s\)

Thus, the time spent in the air by the ball at the given momentum is 6.43 s.

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The ball was thrown upward with an initial velocity of 33.32 m/s and reached a maximum height of 94.1 m.

Speed is a scalar variable that quantifies how quickly an object's position changes in a particular direction. It is a way to gauge how far you've come in a certain amount of time.

The following kinematic equations can be used to calculate the ball's initial speed and its highest point:

Vertical displacement (y) is equal to the sum of the initial vertical velocity (vo) and the acceleration (a) times time plus 0.5.

Initial velocity (vo) plus acceleration (a) times time equals final velocity (v).

where a is the acceleration caused by gravity, or -9.8 m/s2.

By setting the ball's end velocity to zero and solving for its beginning velocity and displacement, we can first determine the height to which it can travel.

vo = 9.8 * t

    = 9.8 * 3.4

    = 33.32 m/s

y = vo * t + 0.5 * (-9.8) * t^2

   = 33.32 * 3.4 - 0.5 * 9.8 * (3.4^2)

    = 94.1 m

So, the ball was thrown upward with an initial velocity of 33.32 m/s and reached a maximum height of 94.1 m.

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Answer:

Having begun as a "science of mental life", psychology evolved in the 1920's into the "scientific study of observable behavior". ... Today's science emphasizes the interaction of genes and experiences in specific environment

Answer:

Psychology continues to develop over the years all the way up to today by new and better scientific like science emphasizes. Also new experiences in specifics enviroment.

Explanation:

Hope it helped :)

The stated assertion states that r> Ra lengths from the conducting cylinder's axis.

We can determine an object's actual size by learning how far it is from us. The area that an object occupies in the sky can be measured. The distance to an object is then necessary to calculate its real size. An thing appears smaller the farther it is away.

Briefing:

The magnetic force is inversely correlated with the conducting cylinder's axis distance.

The strongest magnetic field Rb = 4.95 cm,

Most minimal gravitational flux = r>Ra

Rb = 4.95 cm

r= 5.40 cm

Ra =7.75 cm

r> Ra

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Ten percent Calcofluor White stain is often used in wet mounts of fungi.

Calcofluor White is a fluorescent dye commonly employed in microbiology for the detection and visualization of fungal elements. It binds to the chitin present in the cell walls of fungi, causing them to emit a bright blue fluorescence when illuminated with ultraviolet light. By adding a ten percent Calcofluor White stain to wet mounts, fungal structures such as hyphae, spores, and yeast cells become more easily distinguishable and identifiable under a fluorescence microscope. This staining technique is particularly useful in diagnosing fungal infections, studying fungal morphology, and conducting research on fungal ecology.

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Answer:

As its speed increases.......

The kinetic energy of an object increases as its speed increases. So, option B.

The type of energy that an object possesses as a result of its motion is called kinetic energy.

The kinetic energy of an object is described as the amount of effort required to accelerate a body of a specific mass from rest to its specified velocity.

The body keeps its kinetic energy after gaining it during acceleration, barring changes in speed.

When slowing down from its current pace to a condition of rest, the body expends the same amount of energy.

A force must be applied to an object in order to accelerate it. We must put in effort in order to apply a force. After the work is finished, energy is transferred to the item, which then moves at a new, constant speed.

The kinetic energy of the object,

KE = 1/mv²

where m is the mass and v is the speed of the object.

Since, the mass is a constant, the increase in speed can increase the kinetic energy of the object.

Hence,

The kinetic energy of an object increases as its speed increases.

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The age required for the individual to register a vehicle in NJ is 18 years.

In the state of New Jersey, the minimum age requirement for registering a vehicle varies depending on the type of vehicle being registered. For a passenger car, motorcycle or commercial vehicle, the minimum age requirement is 17 years old. However, if the vehicle is a commercial trailer, the minimum age requirement is 18 years old. Additionally, if the vehicle is being registered by a business or corporation, there is no age requirement. It's important to note that in order to register a vehicle in New Jersey, the individual must have a valid driver's license issued in the state. The registration process involves providing proof of ownership, proof of insurance, and payment of registration fees.

Furthermore, individuals under the age of 18 are required to have parental consent in order to obtain a driver's license or register a vehicle. Additionally, there may be restrictions on driving and vehicle registration for individuals under the age of 18, such as requiring a learner's permit or provisional license.

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Answer:

An open system.

Explanation:

An isolated system allows the exchange of neither energy nor matter with the surroundings. A closed system allows the exchange of energy, but not matter. An open system allows the exchange of both energy and matter.

Notice that in this question, light (electromagnetic wave) is a form of energy. The entry and exit of light allows this system to exchange energy with its surroundings- just as how the earth receives energy from the sun. Additionally, this system could exchange energy with its surroundings through the exchange of matter (in particular, air) with its surroundings.

Thus, the system in this question is an open system.

To determine the distance at which the object should be placed from the lens to achieve the desired image size, we can use the lens formula:

1/f = 1/o + 1/i

Where:

f is the focal length of the lens,

o is the object distance, and

i is the image distance.

In this case, we have a lens with a focal length of 20 cm and we want the image to be four times the size of the object. Since the image size is larger, it will be a virtual image formed on the same side as the object.

Let's assume the object distance is denoted by d. According to the given condition, the image distance will be 4d (four times the object distance).

Substituting these values into the lens formula, we get:

1/20 = 1/d + 1/(4d)

Simplifying the equation, we find:

1/20 = (4 + 1)/(4d)

1/20 = 5/(4d)

Cross-multiplying, we have:

4d = 20 * 5

4d = 100

d = 100/4

d = 25 cm

Therefore, the object should be placed 25 cm from the lens. The correct answer is (b) 25 cm.

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Answer:

The 5 Forces

Explanation:

The five forces that influence wind speed and direction are: Pressure gradient force (flow from high to low pressure) Coriolis force (apparent deflecting force due to the rotation of the Earth) Turbulent drag (Earth's surface or objects like trees or grass resist air flow and decrease wind speed near the ground)

Answer:

Explanation:

A scalar quantity is a physical quantity that has only one characteristic - a numerical value.

The scalar value can be positive or negative.

Examples of scalar quantities: temperature, mass, volume, time, density.

A vector quantity is a physical quantity that has two characteristics:

1) a numerical value that is always positive (vector modulus);

2) direction.

Examples of vector physical quantities: speed, acceleration, force.

Answer:

0.1962N.

Explanation:

Weight is a force, so we use newtons second law which states F=ma. So the weight of a watermelon on earth is 2kg x 9.81m/s², which is 19.62N (newtons). On the moon it weighs 2 x 1.63 which is 3.26N.

The weight of the pen is 0.02 x 9.81, which is 0.1962N. If the pen is not to fall the frictional force needs to be equal to this force,

so the answer is 0.1962N.

(Hope this helps can I pls have brainlist (crown)☺️)

Answer: 10

Explanation:

Given that the radius of the circular path is r = 142 m and the coefficient of the friction is

The condition for the car to travel safely is

Frictional force = centrifugal force

Here, m is the mass of the car and the acceleration due to gravity is g = 9.8 m/s^2.

v is the maximum speed of the car.

We now define a quantity the sum of the potential energy and the kinetic energy is called the total mechanical energy of our system.

The energy a body has as a result of movement or position is known as mechanical energy. The energy that is released by falling from a particular position is a good example. As the literal driving force of the world around us, whether it be natural or man-made, mechanical energy is one of the fundamentals studied in mechanical engineering. In joules, mechanical energy is measured.

E = K + U.

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Answer:

Electromagnets are special types of magnets that are made by passing current through coils of wire. To make an electromagnet, the minimum requirements are:

1. A nail (usually made of iron, steel or zinc)

2. Dry cell batteries

3. Wire (Usually copper wire)

Other things could be:

1. Electric tape to hold both ends of the wire properly at the battery terminals.

2. Scissors to cut the wire into desired length.

3. Iron fillings for testing purposes.

In order to be a vector quantity, the quantity needs to have a direction, besides its magnitude.

For example, temperature has no direction, only magnitude, but velocity has direction and magnitude.

From these options, the only one that is a vector quantity is displacement, therefore the correct option is A.

1) Change in the shape or volume of rocks is Deformation

2) Stress is the deforming force. Strain is the deformation.

Deformation is the term denoting a change in a rock's volume or shape. Geological processes including tectonic forces, compression, tension, and shearing are just a few that can cause it. Rocks may fold, fault, or fracture as a result of deformation, resulting in the production of geological features as mountains, valleys, and fault lines.

Stress is the term used to describe the internal pressure or force that external pressures apply to a material. It is the force acting on the substance per unit area. The distortion that takes place in a material when it is stressed is measured by strain.

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Answer:

D. Energy in an isolated system remains constant.

Explanation:

Energy can be defined as the ability (capacity) to do work. The two (2) main types of energy are;

a. Gravitational potential energy (GPE): it is an energy possessed by an object or body due to its position above the earth.

b. Kinetic energy (KE): it is an energy possessed by an object or body due to its motion.

Furthermore, the various forms of energy are solar energy, electrical energy, chemical energy, thermal energy, wind energy, nuclear energy etc.

The Law of Conservation of Energy states that energy cannot be destroyed but can only be transformed or converted from one form to another.

According to the law of conservation of energy, we can infer or deduce that the total energy of the system must stay the same because it cannot be destroyed, but kinetic energy (KE) can be transformed to potential energy (PE) and potential energy (PE) can be transformed to kinetic energy (KE) within the system.