Three objects are brought close to each other, two at a time. When objects A and B are brought together, they attract. When objects B and C are brought together, they repel. From this, we conclude that (a) objects A and C possess charges of the same sign. (b) objects A and C possess charges of opposite sign. (c) all three of the objects possess charges of the same sign. (d) one of the objects is neutral. (e) we need to perform additional experiments to determine information about the charges on the objects.​

The electron number cannot be used instead because electrons can be removed from or added to an atom (option C)

The element of an atom is determined by its proton count, while the electron count can exhibit variability. Take, for instance, a sodium atom, which encompasses 11 protons and 11 electrons. However, it has the capacity to relinquish one electron, transforming into a sodium ion housing only 10 electrons.

This occurs due to the relatively loose binding of electrons to the nucleus, enabling their removal through the influence of an electric field or alternative mechanisms.

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Answer:

If a cow has a greater mass than the tiger, it has greater momentum, but only if they are moving at the same speed, or the tiger is going slower (i think)

Explanation:

the quantity of motion of a moving body, measured as a product of its mass and velocity.

The future consequence of using windmills for wind energy that is most closely related to the given options is: A) It can harm birds and species nearby. Option A

One of the potential consequences of using windmills for wind energy is the risk of harm to birds and other species. Wind turbines can pose a threat to birds, especially large raptors and migratory birds, as they can collide with the spinning turbine blades.

The fast-moving blades can cause injury or death to birds that come into contact with them. Additionally, the construction and operation of wind farms can disrupt wildlife habitats and migration patterns, impacting local ecosystems.

While weather can certainly affect the quality and consistency of wind energy generation (option B), it is not specifically a consequence of using windmills. Weather patterns and variations in wind speed and direction can influence the efficiency and reliability of wind turbines, but this is an inherent characteristic of wind energy rather than a consequence.

Option C states that wind energy produces less noise than other energy sources. This is a positive attribute of wind energy, as wind turbines generally generate less noise compared to other forms of power generation, such as fossil fuel power plants. However, it is not a future consequence but rather a benefit of wind energy.

Option D refers to wind cells being used in isolated locations. This statement is not related to the consequences of using windmills for wind energy but rather describes the potential use of wind cells (small-scale wind energy systems) in remote or isolated areas.

In summary, the most appropriate answer is A) It can harm birds and species nearby, as the impact on wildlife is a significant consideration in the development and operation of wind energy projects.

Option A.

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Answer: NO, there are many examples of non-conservative forces.

Explanation: Conservatives forces are special forces whose work is zero in a closed path.

Answer:

faster than

Explanation:

because the sun gave it nutrients

Answer:Since pressure = force/area, the same force on a smaller area means more pressure. When you are walking on sand, the force being applied by your body is spread out over the entire surface of your foot. ... So, more pressure applied on a given area of your foot causes more pain.

Explanation:

Good Question

Answer:

The time taken to complete her run is 1.9 hr.

Explanation:

Speed is a scalar quantity and it is defined as the ratio of distance covered to the time taken to cover that distance. As distance is also a scalar quantity, so the directions given in the problem can be ignored. Thus, the distance covered by the jogger is the sum of kilometers given in problem.

Distance covered = 6+5+4 = 15 km

And the speed is given as 8 km/hr.

So the time taken will be ratio of distance to speed.

So the jogger will take 1.9 hr to complete her run.

The given parameter:

initial position of the Jogger = 6 km north

second position of the Jogger = 5 km east

final position of the Jogger, = 4 km north

average speed of the jogger = 8km/h

To find:

Calculate the time taken for each position:

\(time = \frac{distance }{speed} \\\\t_1 = \frac{6 \ km}{8 \ km/h} = 0.75 \ hr\\\\t_2 = \frac{5 \ km}{8 \ km/h} = 0.625 \ hr\\\\t_3 = \frac{4 \ km}{8 \ km/h} = 0.5 \ hr\\\\\)

Total time = 0.75 hr + 0.625 hr + 0.5 hr = 1.875 hr

The time (hour, minutes and seconds) = 1 hour, 52 minutes, 30 seconds

The average velocity is calculated as:

\(average \ velocity = \frac{displacement }{time}\)

The displacement is the shortest point between the initial position and the final position.                                    

                                                         Q

                                                          ↑

                                                          ↑ 4km

                                                          ↑

                             ↑→ → → →5km→ → →

                             ↑ 6km                   |

                             ↑                            |

                             p -----------------------| Y

The line PQ is the displacement = hypotenuse side

The line PY = base of the right triangle = 5 km

The line YQ = height of the triangle = 4 km + 6km = 10 km

The line PQ is calculated as:

\(PQ^2 = 5^2 + 10^2\\\\PQ^2 = 125\\\\PQ = \sqrt{125} \\\\PQ = 11.18 \ km\)

The average velocity is calculated as:

\(V = \frac{11.18}{1.875} = 5.96 \ km/hr\\\\V(m/s) = \frac{5.96}{3.6} = 1.66 \ m/s\)

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The masses of the two objects MA and MB in the binary system are 4 Mo respectively.

The masses of binary systems can be calculated using Kepler's laws of planetary motion and observations of the system.

Let's denote the masses of the two objects as MA and MB, where MA is the mass of object A and MB is the mass of object B. We know that the total mass of the binary system is 8 Mo, so:

MA + MB = 8 Mo

We also know that the ratio of the distances between the two objects is 1/3. Let's denote the distance between the two objects as d, so we have:

d(A to B) / d(Binary System) = 1/3

We can simplify this equation by using the fact that the distances between the objects and the binary system add up to the total distance between the objects:

d(A to B) + d(B to binary system) = d(Binary system)

Since we know the ratio of the distances, we can substitute 1/3d for d(B to binary system):

d(A to B) + 1/3d = d(Binary system)

3d(A to B) + d = 3d(Binary system)

Substituting d(A to B) for d(Binary system) - d(B to binary system), we get:

3d(A to B) + d = 3(d(A to B) + d(B to binary system))

2d(A to B) = 2d(B to binary system)

d(A to B) / d(B to binary system) = 1

So the two objects are at the same distance from the binary system center of mass. This means that the masses of the two objects are equal:

MA = MB

Substituting this into the first equation, we get:

2MA = 8 Mo

MA = MB = 4 Mo

Therefore, the mass of each object is 4 Mo.

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Explanation:

You want  N/m

 N = 66 * 9.81

 m = 2.3 x 10^-2 m

66* 9.81 / 2.3 x 10^-2  = 28150 =  28 000 N/m    to two S D

Answer:

C. Mass

Explanation:

If something has the same weight than it has the same mass

Answer: C

Explanation: the mass is the same as weight so if they have weight they also must have mass.

Answer:

neon and argon

Explanation:

because they are inert gas

Although we do not have the necessary information to provide an exact answer, we can confirm that the object will have fallen by a multiple of 9.8 meters due to gravity.

When an object is dropped, its acceleration is determined by gravity. This force applies a constant acceleration of 9.8 meters per second. Therefore, to calculate its speed at distance h, we would need to know the time it has taken the object to reach this point, and use that together with our known acceleration in order to calculate its current speed.

Therefore, we can confirm that in order to calculate the current speed of the object at point h, we require the time taken to reach this point or the value of the distance itself and that the answer will be a multiple of 9.8, due to gravity.

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When two magnets are close to each other, the magnets experience a repulsive or attractive force. The magnetic field strength is affected by the orientation of the magnet.

The direction in which the bar magnet obtains its maximum magnetic property is called the orientation of the magnet. The magnetic field strength depends on the orientation of the magnet.

The magnetic field lines emerge from the north pole and end in the south pole. When the two bar magnets of opposite poles face each other, an attractive force will be produced and magnetic field strength increases.

When the bar magnet of the same poles faces each other, repulsive force will produce and magnetic field strength decreases. Hence from the orientation of the bar magnet,  the magnetic field strength gets affected.

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Based on the principle of moments and the data provided;

The principle of moments states that the for a body in equilibrium, the sum of the clockwise moments is equal to the sum of the anticlockwise moments about a point.

At the point where the uniform rod is about to tilt, it is at equilibrium.

Anticlockwise moments = 30 × (1.3 - 0.5) = 24

Clockwise moments = m × (2.5 - 1.3)

where m is the mass of the end

Clockwise moments = m × 1.2

1.2 × m = 24

m = 20 Kg

Therefore, the mass of the rod is 20 kg

Assuming the boy moves to B and a block of mass X is placed at:

Anticlockwise moments = 30 × 1.3 = 39

Clockwise moments = 20 × 1.2 + X × 3.7

Clockwise moments = 24 + 3.7X

39 = 24 + 3.7X

3.7X = 15

X = 4.054 kg

Therefore, the smallest value of X of the block that will enable the boy to stand on the beam at B without the beam tilting is 4.054 kg

Assuming that the block is a particle allowed the assumption that the block touches the rod at only a point.

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Answer:

Explanation:

The only explanation I can think of is this:

Block 1 is moving to the left and strikes Block 2, which is at rest.  100% of the momentum of Block 1 transfers to Block 2.  So Block 2 now moves to the left at 4 m/s (you didn't specify a unit) and Block 1 comes to a complete stop and is now at rest.

Answer:

aluminium is used in making aircraft because of its high resistance to corrosion and good weight to strength to cost ratio .

A scenario of how the log will be is given in the image attached.

In this scenario attached, the individual has set a goal of increasing their muscle strength and overall fitness. They have been keeping track of their exercises in a log, noting the date, activity, time, weights used, and improvement from the last session.

Therefore, As shown in the log, the individual has been progressively increasing the weights used in each exercise, which is a sign of improvement and progress towards their goal. By keeping this log, the individual can easily track their progress and make adjustments to their training routine as needed.

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The flaps increase the mass of the cargo as the engineering students install flaps that extend off the cargo load to maximize drag force during landing and prevent their cargo from opening on landing.

Newton's second law states that force is proportional to mass and acceleration.

F = m a

The applied force creates an acceleration in the elephant a = F / m. If the mass of the elephant increases m2> m, the expression takes the form a = F / m2. With the denominator is greater the acceleration should decrease by the same factor that increases the mass.

The frequency of a wave depends on the properties of medium density and the elasticity properties change the amplitude depends on the energy carried by the wave, that is, the amplitude is proportional to the height of the wave (oscillation).

Therefore, The flaps increase the mass of the cargo as the engineering students install flaps that extend off the cargo load to maximize drag force during landing and prevent their cargo from opening on landing.

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The unit of N is 238.8

What is unit ?

an individual thing or person regarded as single and complete but which can be a also form the an be  individual component of a larger or more complex the  whole.

Sol-On an inclined plane, component of the weight i.e. gravitational force acting in opposite direction to normal force is mgcos\thetamgcosθ and the component acting down the inclined plane is mgsin\theta.mgsinθ.

It is given that the weight of the block is, mg=  242.N

The angle made with the inclined plane is 37.2°

\Rightarrow mgsin\theta = 242.N N sin 37.2°/^o =238 N⇒mgsinθ=242.N?Nsin42.9

o

=238.8N

Hence, the component of the gravitational force acting down the inclined plane is 238.8 N.

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Answer:

Velocity is a vector whose magnitude is called speed. Collision study needs to analyse the transfer of momentum, which is another vector quantity associated with the velocity vector of each object

Explanation:

The important concept to recall is that velocity is a vector quantity, which has direction apart from just magnitude (as speed is). So in the transfer of momentum (another vector quantity) that takes place in a collision, it is extremely important to know the direction of the velocity vector, since there is much larger transfer of momentum if the cars collide heads on, than if the cars collide from behind while going in the same direction.

Answer:

Answer

Explanation:

It is given that,

The horizontal speed of a dart player =

12.4 m/s

The dart hits the board 0.32 m below the

height from which it was thrown.

We need to find how long it take the dart

to hit the board.

Let the time taken by the dart to hit the

board. Using second equation of motion

to find it.

1

y = ut +

2

=

at2

Put u = 0 and a=-g

-

-1

y =

1942

1

-0.32

=

x 9.8t2

2

2 x 0.32-0.32

=

t=

9.8

t= 0.255 s

Let x be the horizontal distance travelled.

It is calculated as follows:

X =

12.4 x 0.255

=

= 3.16 m

So, the dart will hit the board at a

distance of 3.16 m.

Muscardinus • Quality

The rate at which an object changes its velocity is known as acceleration, a vector quantity.

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Answer:

the focal length of the eyepiece is 17.23 cm

Explanation:

The computation of the focal length of the eyepiece is shown below:

= Focal length of objective lens ÷ angular magnification magnitude

= 86.3 ÷ -5.01

= 17.23 cm

Hence, the focal length of the eyepiece is 17.23 cm

We simply divided the angular magnification magnitude from the focal length of objective lens so that the focal length of the eyepiece could come

The minimum mass required to be placed on the 0.00 cm mark of the meter stick to maintain equilibrium is 0.120 kg.

To maintain equilibrium, the torques acting on the meter stick must balance each other. The torque is given by the formula:

τ = r * F * sin(θ)

where τ is the torque, r is the distance from the pivot point to the point where the force is applied, F is the force applied, and θ is the angle between the force vector and the lever arm.

In this case, the meter stick is in equilibrium when the torques on both sides of the pivot point cancel each other out. The torque due to the weight of the meter stick itself is acting at the center of mass of the meter stick, which is at the 50.0 cm mark.

Let's denote the mass to be placed on the 0.00 cm mark as M. The torque due to the weight of M can be calculated as:

τ_M = r_M * F_M * sin(θ)

where r_M is the distance from the pivot point to the 0.00 cm mark (which is 30.0 cm), F_M is the weight of M, and θ is the angle between the weight vector and the lever arm.

Since the system is in equilibrium, the torques on both sides of the pivot point must be equal:

τ_M = τ_stick

r_M * F_M * sin(θ) = r_stick * F_stick * sin(θ)

Substituting the given values:

30.0 cm * F_M = 20.0 cm * (0.0400 kg * 9.8 m/s^2)

Solving for F_M:

F_M = (20.0 cm / 30.0 cm) * (0.0400 kg * 9.8 m/s^2)

F_M = 0.0264 kg * 9.8 m/s^2

F_M = 0.25872 N

Finally, we can convert the force into mass using the formula:

F = m * g

0.25872 N = M * 9.8 m/s^2

M = 0.0264 kg

Therefore, the minimum mass required to be placed on the 0.00 cm mark of the meter stick to maintain equilibrium is 0.120 kg.

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Answer: What type of dog is green and red?

Explanation:

Neglecting air resistance, firing a projectile at an angle of 45

degrees will allow it to have the greatest horizontal displacement or range.

We can prove this by using the range formula, which is...

\(R=\frac{v^2sin(2 \theta)}{g}\)

In order to maximize the value R, \(sin(2 \theta)\) has to be equal to 1. What values of theta make sine equal 1? In degrees, that would be 90. So if we let θ equal 45 we get....

\(R=\frac{v^2sin(2 (45))}{g} \Longrightarrow R=\frac{v^2sin(90)}{g} \Longrightarrow R=\frac{v^2(1)}{g}\)

Thus, the value of R is maximized.