PLEASE HELP ON EDGE I WILL GIVE U A BRAINLIST IF U GET IT RIGHT

a) The weight of the box of textbooks can be calculated as follows;

Weight of

box= mass × acceleration due to gravity

Where mass= 55 kg

Acceleration due to

gravity= 9.8 m/s²Thus, the weight of the box of textbooks is given by;

Weight of

box= 55 kg× 9.8 m/s²= 539 N

the weight of the box of textbooks is 539 N.

b) The coefficient of friction can be calculated using the formula;Coefficient of friction= frictional force/ Normal forceWhere, frictional force is the force required to keep the box moving at constant velocity and normal force is the force acting on the box perpendicular to the surface on which the box is resting.

The force F of the student pushing the box can be resolved into its horizontal and vertical components as follows;

F_x= 320 N (this is the horizontal component of the force)F_y=

(This is the vertical component of the force)Thus, the normal force on the box is given by;

F_y= Normal forceNormal force= weight of box= 539 NThe frictional force is given by.

F_f= F_x= 320 NThe coefficient of friction is given by;Coefficient of friction= frictional force/ Normal forceCoefficient of friction= F_f/ F_yCoefficient of friction= 320 N/ 539 NCoefficient of friction= 0.593Therefore, the coefficient of friction is 0.593.

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Answer:

Ionic bonds are formed between cation and anions . A cation is formed when a metal ion loses valence electron while an anion is formed when a non-metal gains a valence electron.

Answer:

Approximately \(12.3\; {\rm N}\) at approximately \(106^{\circ}\).

Explanation:

Assume the two given directions are measured with respect to the positive \(x\) axis.

If a vector of magnitude \(\| a\|\) is at an angle of \(\theta\) from the positive \(x\) axis, this vector can be written in the component form as:

\(\begin{aligned}\| a\|\begin{bmatrix}\cos(\theta) \\ \sin(\theta)\end{bmatrix}\end{aligned}\);

Or equivalently:

\(\begin{aligned}\begin{bmatrix}\|a\|\, \cos(\theta) \\ \|a\|\, \sin(\theta)\end{bmatrix}\end{aligned}\).

For example, the \(7.6\; {\rm N}\) force is a vector with magnitude \(7.6\; {\rm N}\) at a direction of \(38^{\circ}\) from the positive \(x\) axis. This vector can be represented as:

\(\begin{aligned} 7.6\, \begin{bmatrix}\cos(38^{\circ}) \\ \sin(38^{\circ})\end{bmatrix} &= \begin{bmatrix}7.6\, \cos(38^{\circ}) \\ 7.6\, \sin(38^{\circ})\end{bmatrix} \approx \begin{bmatrix}5.9889 \\ 4.6790 \end{bmatrix}\end{aligned}\).

Similarly, the \(11.8\; {\rm N}\) vector can be represented as:

\(\begin{aligned}11.8\, \begin{bmatrix}\cos(143^{\circ}) \\ \sin(143^{\circ})\end{bmatrix} &= \begin{bmatrix}11.8\, \cos(143^{\circ}) \\ 11.8\, \sin(143^{\circ})\end{bmatrix} \approx \begin{bmatrix}-9.4239 \\ 7.1014 \end{bmatrix}\end{aligned}\).

To find the sum of the two vectors, take the sum of each component separately:

\(\begin{aligned}& \begin{bmatrix}5.9889 \\ 4.6790 \end{bmatrix} + \begin{bmatrix}-9.4239 \\ 7.1014\end{bmatrix} \\ =\; & \begin{bmatrix}5.9889 + (-9.4239)\\ 4.6790 + 7.1014\end{bmatrix} \\ \approx\; & \begin{bmatrix}-3.4350 \\ 11.780\end{bmatrix} \end{aligned}\).

Apply the Pythagorean Theorem to find the magnitude of this vector sum:

\(\displaystyle \sqrt{(-3.4350)^{2} + (11.780)^{2}} \approx 12.271\).

Note that the first component (\(x\)-component) of this vector is negative, such that this vector would point to the left of the vertical axis. Since the second component (\(y\)-component) of this vector is positive, this vector would point above the horizontal axis. Hence, the direction of this vector (relative to the positive \(x\!\)-axis) would be an angle between \(90^{\circ}\) and \(180^{\circ}\).

Divide the \(x\)-component of this vector by its magnitude to find the cosine of the angle between this vector and the positive \(x\!\)-axis. Apply the inverse cosine function to find this angle:

\(\begin{aligned}\arccos \left(\frac{-3.4350}{12.271}\right) \approx 106^{\circ}\end{aligned}\).

The true azimuth of the AB alignment is 91º 52' (east of north), the magnetic azimuth is 100º 22' (east of north), and the grid azimuth is 108º 52' (east of north).

To find the true azimuth, magnetic azimuth, and grid azimuth of the AB alignment, we need to consider the magnetic declination. The magnetic declination indicates the angle between true north and magnetic north at a specific location. In this case, the magnetic declination is 8º 30' E, which means that the magnetic north is 8º 30' east of the true north.

To calculate the true azimuth, we subtract the magnetic declination from the grid azimuth. The grid azimuth is given as 100º 22', so subtracting the magnetic declination of 8º 30' E gives us a true azimuth of 91º 52' (east of north).

The magnetic azimuth remains the same as the grid azimuth, which is 100º 22' (east of north).

The grid azimuth is calculated by adding the magnetic declination to the true azimuth. Since the magnetic declination is east, we add it to the true azimuth. Adding 8º 30' E to the true azimuth of 91º 52' gives us a grid azimuth of 108º 52' (east of north).

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Answer: Natural selection, Genetic drift , Mutations and Gene flow

Explanation:  

Answer:

The correct answer is B. Algae and fungi are biotic; temperature and rainfall are abiotic.. FURTHER EXPLANATION. An ecosystem consists of all living and non-living factors in an environment that interact and that are interdependent with each other.. All living things or factors in an ecosystem are called biotic factors.Examples include organisms like plants, animals, humans, etc.

Explanation:

Answer:

Explanation:

Specific heat capacity of a body is expressed as H = mcΔt

H = heat energy released by the body

m = mass of the body

c = specific heat capacity of the body

Δt  = change in temperature of the body

Given H = 2000J, m = 0.5 kg, c = 4,186 J/kg° C.

Δt = H/mc

On substituting the given value;

Δt  = 2000/4,186*0.5

Δt   = 2000/2093

Δt = 0.96°C

The temperature difference between when the blood arrives at the body surface and returns back to the Interior of the body is 0.96°C

Answer:

the answer is 32,400

Explanation:

I looked it up for you

The average speed denotes the average rate of speed over the extent of a trip. The average speed of a car which travels 270 meters in 30 seconds is 9m/s.

The average speed can be defined as the ratio of the total distance travelled by an object to the total time taken. It is a scalar quantity. It is represented by the magnitude and does not have direction. Its SI unit is m/s.

The average speed of an object help us to calculate the rate of travel time and the distance. The average speed of an object when it covers the same distance at two different speed, X and Y is:

Average speed = 2XY/ X+Y

The equation used here to calculate the average speed is:

Average speed = Total distance / Total time

Average speed  = 270 m / 30 s = 9 m/s

Thus the average speed is 9 m/s.

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Answer:

You first push in then when the syringe is full push the out

Explanation:

1. in

2. out

but u should watch a You-tube video just in case

I hoped this helped!

Explanation: It Should Be 30:60 So If You Simplify It Would Be 1:2

(I think it's The answer I don't Know)

Answer:

Temperature T2 = 237.5 K

Explanation:

Given:

Volume = 35 ml

T1 = 285 k

P1 = 150 pa

P2 = 125 pa

Find:

Temperature T2

Computation:

P1V/T1 = P2V/T2

150(35) / 285 = 125(35) / T2

Temperature T2 = 237.5 K

Answer: Atomic mass

Explanation:

I took the test!

your welcome

Answer:

Atomic Mass on edge2020

Explanation:

Just did it. And got it correct.

The correct option that best explains the role of social facilitation in accounting for the results of Study 2 is (a) individuals perform more efficiently when they know they are being observed compared to when they know they are not being observed.

Social facilitation is the term used to describe the process where the presence of others can affect the way that an individual performs a task. According to the definition, when an individual's performance improves in the presence of others, this is called social facilitation. In this study, when participants dressed in familiar clothing, they performed quickly, but when dressing in unfamiliar clothing, they performed more slowly. This means that the social facilitation took place, which resulted in an improvement in their performance while wearing familiar clothing.

Therefore, the correct answer is option (a) individuals perform more efficiently when they know they are being observed compared to when they know they are not being observed.

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Answer:

there are 25 kg objective travelling at 2m/s to the right.

For a block of solid copper sits on a flat, level table. Copper has a density of 8. 94 ✕ 103 kg/m3, the volume of the block  is mathematically given as

V = 2.28x10^3

Generally, the equation for the volume of the block is mathematically given as

V = m/p

V = 20.4/8.94x10^3

V = 0.00228

V = 2.28x10^3

In conclusion, the volume of the block is

V = 2.28x10^3

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Answer:

1)  8.1x\(10^{-6}\) N

2) 4.0x\(10^{1}\) N/C

Explanation:

1) E = F/q ---> F = Eq = (27 N/C) x (3x\(10^{-7}\))

= 8.1x\(10^{-6}\) N

2) E = \(\frac{F}{q}\) = \(\frac{2.0X10^{-4} }{5.0X10^{-6} }\)

= 4.0x\(10^{1}\) N/C

The steady-state charge and current are:

The steady-state charge and current in an LRC-series circuit can be found using the following equations:

qp(t) = Q0 cos(t - θ)

ip(t) = I0 cos(t - θ)

where:

qp(t) = steady-state charge

ip(t) = steady-state current

Q0 = initial charge

I0 = initial current

θ = phase angle

The initial charge and current can be found using the following equations:

Q0 = E0 / R

I0 = E0 / L

where:

E0 = applied voltage

In this case, the applied voltage is E(t) = 40 cos(t) V, so the initial charge and current are:

Q0 = 40 / 4 = 10 C

I0 = 40 / 1 = 40 A

The phase angle can be found using the following equation:

tan(θ) = ωL / R

where:

ω = angular frequency

In this case, the angular frequency is ω = 1 / √LC = 1 / √(1 × 0.1) = 10 rad/s, so the phase angle is:

θ = arctan(10) = 78.7°

Therefore, the steady-state charge and current are:

qp(t) = 10 cos(t - 78.7°) C

ip(t) = 40 cos(t - 78.7°) A

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Answer:

Explanation:

There could be several reasons why the fridge magnets are not attaching to the fridge. Here are a few possible explanations:

Material: The magnets you purchased might not be made of a magnetic material. Some souvenirs may look like magnets but are only decorative and lack the magnetic properties required to stick to metal surfaces like a fridge.

Magnetic strength: The magnets you bought may have weak magnetic strength, making them unable to attach to the fridge. Magnets vary in their strength, and if the ones you have are not powerful enough, they may not adhere to the fridge's surface.

Fridge surface: The surface of your fridge may not be magnetic. While many fridges have magnetic surfaces, some newer models or specialized fridges may have non-magnetic materials, such as stainless steel or plastic, which won't hold magnets.

Protective coating: If your fridge has a protective coating or a layer of paint, it might interfere with the magnetic force. The magnets need direct contact with the metal surface to adhere, and any barrier between the magnet and the fridge can prevent attachment.

Incorrect positioning: It's also possible that you are not placing the magnets correctly on the fridge. Make sure you are placing them on a flat, smooth surface without any obstructions or unevenness that could prevent proper contact.

Dirty or greasy surface: If the surface of your fridge is dirty, greasy, or covered with dust, it can create a barrier between the magnet and the fridge, making it difficult for them to stick. Clean the surface with a mild detergent or cleaner to remove any dirt or grease.

It's worth noting that the effectiveness of fridge magnets can vary, and sometimes a combination of factors can contribute to them not sticking. If none of the above reasons seem to apply, it may be necessary to consider alternative options or consult the manufacturer of the fridge for more information.

The narrow rings of Saturn, as seen in space probe photos, are caused by the gravitational influence of nearby moons. These moons create gaps and disturbances in the ring material, resulting in narrow sections. Additionally, some sections of the rings may be denser than others, causing them to appear narrower in photos taken by space probes.

Some rings of Saturn appear narrow in space probe photos due to a combination of gravitational forces and the presence of shepherd moons. These moons orbit close to the rings and their gravitational influence helps to maintain the narrow, well-defined shape of certain rings. In summary, the interaction between the gravitational forces of the shepherd moons and the ring particles results in the narrow appearance of some of Saturn's rings in space probe images.

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Answer:

\(the \: net \: force \: on \: the \: desk \: will \: \\ increase \: by \: 30 \: newtons .\\ \\ the \: desk \: will \: only \: accelerate \: if \: the \: net \: \\ force \: applied \: to \: it \: is \: greater \: tha n \\ \: the \: weight \: of \: the \: desk \: in \: newtons.\)

Complete Question:

A tungsten wire is 1.5 m long and has a diameter of 1.0 mm. A current of 60 mA flows through the wire. The resistivity of the wire is 5.6 * 10^-8 Ωm. What is the potential difference across the ends of the wire?

Answer:

Potential difference, V = 0.00642 Volts.

Explanation:

Given the following data;

Diameter = 1 mm to meters = 1/1000 = 0.001 m

Length = 1.5m

Current = 60mA = 60/1000 = 0.06 Amperes.

Resistivity = 5.6 * 10^-8 Ωm

To find the potential difference across the ends of the wire;

First of all, we would determine the cross-sectional area of the wire (circle);

\( Radius, r = \frac {diameter}{2} \)

\( Radius = \frac {0.001}{2} \)

Radius = 0.0005 m

Area of wire (circle) = πr²

Substituting into the above formula, we have;

Area  = 3.142 × (0.0005)²

Area = 3.142 × 2.5 × 10^-7

Area = 7.855 × 10^-7 m²

Next, we find the resistance of wire;

Mathematically, resistance is given by the formula;

\( Resistance = P \frac {L}{A} \)

Where;

P is the resistivity of the material.

L is the length of the material.

A is the cross-sectional area of the material.

Substituting into the formula, we have;

\( Resistance = 5.6 * 10^{-8} \frac {1.5}{7.855 * 10^{-7}} \)

\( Resistance = 5.6 * 10^{-8} * 1909611.712 \)

Resistance = 0.107 Ohms.

Now, we can find the potential difference using the formula;

\( V = IR\)

Where;

V represents voltage or potential difference measured in volts.

I represents current measured in amperes.

R represents resistance measured in ohms.

Substituting into the formula, we have;

\( V = 0.06*0.107\)

Potential difference, V = 0.00642 Volts.

The total energy of the body at evevry point is remained same due to the law of conservation of energy. Distance from A to B and final velocity of the ball just reach before C is 44.3 m/s.

d (distance) from A to B is = √2gh

In this case given are, g = 9.8 m/s² and h = 100m,

so here d = √(2⋅9.8⋅100) = 44.3m.

Final velocity ,v = √2gh

Here given are , v is the velocity, g is the acceleration due to gravity, and h is the height. In this case,

g = 9.8 m/s² ,h = 100m,

v = √(2⋅9.8⋅100)

= 44.3 m/s (final velocity)

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A brighter light source will result in a larger voltage drop across the resistor in a circuit with a phototransistor because the increased current flowing through the circuit causes a larger voltage drop according to Ohm's law.

If there is a single resistor in series with a phototransistor, a brighter light source would result in a larger voltage drop across the resistor.

The reason for this is that when the phototransistor is exposed to a brighter light source, more current will flow through the circuit because the phototransistor allows more current to pass through in the presence of a brighter light.

This increased current will cause a larger voltage drop across the resistor because the voltage drop across a resistor is directly proportional to the current flowing through it according to Ohm's law.

Ohm's law states that the voltage drop (V) across a resistor is equal to the current (I) flowing through it multiplied by the resistance (R) of the resistor:

V = IR.

Therefore, if the current through the circuit increases due to the brighter light source, the voltage drop across the resistor will also increase because the resistance of the resistor remains constant.

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the current (I) through an 80 W toaster when it operating voltage on 220V is 0.36 A.

Power is the rate of doing work. Power is also defined as work divided by time. i.e. Power = Work ÷ Time. Its SI unit is Watt denoted by letter W. Watt(W) means J/s or J.s-1. Something makes work in less time, it means it has more power. Work is Force times Displacement. Dimension of Power is [M¹ L² T⁻³]. The Electric Power  is current times voltage.

P = VI

Putting all the values,

80W = 220×I

I = 80/220

I = 0.36 A

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Answer:

1

Explanation:

In a space with hyperbolic geometry, the behavior of parallel lines differs from that of Euclidean geometry.

In hyperbolic space, parallel lines diverge from each other as they extend further.If two initially parallel flashlight beams traverse billions of light-years of space in a hyperbolic geometry, they will gradually diverge from each other. The divergence between the beams will increase as they travel a greater distance.

This phenomenon is a consequence of the non-Euclidean geometry of space. In hyperbolic space, the curvature causes parallel lines to "spread out" or diverge. The extent of the divergence will depend on the specific curvature of the space and the distance traveled.

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When you are riding in a plane, your motion is primarily in the forward direction relative to the person standing on the sidewalk. From their perspective, the plane will appear to be moving forward, and you will be moving with it. However, the motion of the plane relative to the car is more complex.

If the car is also moving forward, then the plane's motion will appear to be a combination of forward and sideways motion. If the car is stationary, then the plane's motion relative to the car will be primarily forward. Overall, your direction of motion in the plane will depend on various factors such as the speed and direction of the plane and the relative motion of other objects around you.
Suppose you are riding in a plane and need to describe the direction of your motion relative to a person standing on the sidewalk and a car. First, let's consider the person on the sidewalk. As the plane moves through the air, your motion relative to the person is in a horizontal direction, specifically in the direction that the plane is flying. You are also moving vertically upward as the plane gains altitude.

Now, let's consider the car. The direction of your motion relative to the car depends on the car's movement. If the car is stationary or moving in the same direction as the plane, your motion relative to the car is similar to that of the person on the sidewalk. However, if the car is moving in the opposite direction or at an angle to the plane's path, your motion relative to the car would be a combination of the horizontal and vertical movement of the plane, as well as the car's movement.

In conclusion, your motion relative to the person on the sidewalk and the car is dependent on the plane's horizontal and vertical movements and, in the case of the car, its own movement as well.

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Answer:

The uniy which is accepted all over the world is called SI unit.

Explanation:

The system of measurement that is agreed by the international convention if scientists that is held in paris of France to adopt an international unit is called SI unit unit.