An electrically neutral balloon is rubbed on your hair. if your hair loses electrons, the balloon has what type of electric charge?

The force exerted on the beam by the right support is 457.8 N. Notice that the beam weighs 10 kg and that the man exerts a force of 686.7 N on it. Therefore, the supports must exert a total force of 696.6 N (686.7 N + 10 kg x 9.81 m/s²) on the beam.

The 70 kg man's center of gravity is located 0.8 m from the left support. The beam weighs 10 kg. When the beam is about to tip over, the force exerted on the beam by the right support is 560 N.

Let's begin by calculating the gravitational force (Fg) exerted by the man on the beam:F_g = mgF_g = (70\ kg) (9.81\ m/s^2) = 686.7\ N$$Next, let's find the moment (M) of the gravitational force (Fg) about the left support:M = F_g\ dM = (686.7\ N) (0.8\ m) = 549.36\ N\cdot m.

The gravitational force (Fg) generates a counterclockwise moment (M) about the left support. Hence, the beam starts to tip clockwise. The right support must generate a clockwise moment equal in magnitude to the counterclockwise moment generated by Fg about the left support. Since the beam is in static equilibrium, the sum of the moments about any point must be equal to zero.

Let's find the moment generated by the right support (MRS):M_{RS} = MF_{RS}\ L_2 = F_g\ L_1F_{RS} = \frac{F_g\ L_1}{L_2}F_{RS} = \frac{(686.7\ N)(0.8\ m)}{(1.2\ m)} = 457.8\ N .

The force exerted on the beam by the right support is 457.8 N. Notice that the beam weighs 10 kg and that the man exerts a force of 686.7 N on it. Therefore, the supports must exert a total force of 696.6 N (686.7 N + 10 kg x 9.81 m/s²) on the beam.

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Answer: it's rather A or B

Explanation: those are the moments it stops but most likely it is answer A.

The observer can see to a depth of approximately 3.76 m. we need to consider the concept of apparent depth in optics.

To determine the depth to which the observer can see, we need to consider the concept of apparent depth in optics.

The apparent depth of an object submerged in a medium is given by the formula:

Apparent Depth = Actual Depth / Refractive Index

In this case, the observer is looking horizontally at the edge of the swimming pool, so the angle of incidence is 90 degrees. The light rays coming from the bottom of the pool will undergo refraction as they pass from water (with a refractive index of 1.33) to air (with a refractive index of 1). To calculate the depth to which the observer can see, we need to find the apparent depth.

Given:

Actual Depth = 5 m

Refractive Index of water (n) = 1.33

Applying the formula:

Apparent Depth = Actual Depth / Refractive Index

Apparent Depth = 5 m / 1.33

Calculating the apparent depth:

Apparent Depth ≈ 3.76 m

Therefore, the observer can see to a depth of approximately 3.76 m.

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Answer:

False

Explanation:

Potential energy is stored energy, so it is not in motion. Kinetic energy is the energy in motion.

Answer:

D

Explanation:

Change in speed or direction is acceleration

An object accelerates when it is moving faster. Option A is corect.

The rate of velocity change concerning time is known as acceleration. According to Newton's second law, the eventual effect of all forces applied to a body is its acceleration.

The pace at which a body's velocity varies is represented by acceleration, which is a vector quantity.

\(\rm a = \frac{v-u}{t}\)

Where,

u is the initial speed in m/sec

v is the final speed in m/sec

t is the time interval in sec

a is the acceleration in m/sec²

When an object is accelerating it speeds up.

Hence option A is correct.

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It took 50 joules to push a crate 2.5 meters. With what force was the crate pushed?

Answer:

The Principle of Progression

(I searched it up since I never learned this)

Explanation:

The principle of progression states that a person should start slowly and increase exercise gradually. Since Mandy is just getting started on her exercise routine, she should begin with a few workouts over a large span of time, then work her way up so she can do more workouts in a shorter span of time.

The monument is attracted to Earth with a force equal to its weight, and Earth is attracted to the monument with an equal force. The situation can be represented with two force vectors of equal magnitude but pointing in opposite directions.

An object with mass changes its velocity in response to a push or pull. Force is an external agent that has the power to alter a body's resting or moving state. It has a size and a movement.

Both contact and non-forces are different types of force. Examples of forces include gravitational force, nuclear force, frictional force, magnetic force, electrostatic force, spring force, and others.

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Answer:

43,919.66 Kilotones de Co2 en 2016.

Explicación:

Ecuador produce 43,919.66 Kilotones de Co2 en 2016. Las tierras húmedas son muy importantes para la biodiversidad porque proporcionan hábitat a millones de animales. Alrededor del 35 por ciento de todas las especies amenazadas y en peligro vive en estas tierras húmedas. Estas tierras húmedas son altamente productivas y tienen la capacidad de mejorar la calidad del agua, prevenir la degradación del suelo y proporcionar alimentos a los animales que viven en estas tierras húmedas.

A dielectric test set, commonly used for testing capacitors is known as a Hipot tester (High Potential Tester) because of its ability to produce a high voltage or high potential.

Hipot testing (high potential testing) refers to a method of verifying the electrical insulation used to protect against electrical shock. Hipot testing works by charging the isolated conductor with a high voltage (normally much higher than its operating voltage) to test the quality of the insulation. The theory behind the test is that if a breakdown or breach occurs, the arc will cause a current surge, and the breakdown or breach will be visible.

A dielectric strength test is a critical stage in product development and quality control. In conclusion, a dielectric test set, often used for testing capacitors is generally referred to as a Hipot tester because of its ability to produce a high voltage or high potential.

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As per the law of conservation of energy, the potential energy of the roller coaster is conserved and converted into some other energy.

The potential energy of the roller coaster is converted into kinetic energy.

The potential energy can be defined as the energy stored in an object due to its position.

Given that a roller coaster moves down a hill.

The roller has a large amount of potential energy due to its relative position from the ground.

When the roller coaster starts, some of its potential energy is used in changing its position. When the roller coaster changes its position and starts moving, it gains kinetic energy to move. This kinetic energy is gained from the potential energy of the coaster.

The kinetic energy gained by the coaster from its potential energy depends on the mass of the coaster and moving speed.

Hence we can conclude that the potential energy of the roller coaster is converted into kinetic energy.

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A gray whale travels an average of 120 km per day as it migrates is an example of Speed.

Speed is the ratio of distance to time taken. It is given by:

Speed = Distance / time

Speed is a scalar quantity, hence it has magnitude and no direction.

Hence, A gray whale travels an average of 120 km per day as it migrates is an example of Speed since the direction of the whale is not given.

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Explanation:

\(speed : U = 20 \: m {s}^{ - 1} \\ {V}^{2} = {U}^{2} + 2aS \\ 0 = {20}^{2} + (2 \times a \times S) \\ a = \frac{200}{S} \: m {s}^{ - 1} \)

Answer:

Convection

Explanation:

conduction is like, electricity. radiation is like using a microwave.

Answer:

conduction

Explanation:

recall that conduction is the transfer of heat between objects that come in direcr contact.

You are putting heat directly on the part of the firework that allows it to spark, therefore it is conduction.

Convection takes place within a fluid.

Radiation is indirect heat through waves. (think of the sun warming us indirectly)

Grounding of electrical equipment is the primary method of reducing electrical hazards for several reasons Safety during faults, Voltage stabilization, Surge protection, etc.

Grounding of electrical equipment is the primary method of reducing electrical hazards for several reasons:

Safety during faults: Grounding provides a low-resistance path for electrical current to flow in the event of a fault or electrical malfunction. When a fault occurs, such as a short circuit or equipment failure, excessive current can flow through the grounding system, which helps to quickly and safely divert the current away from people and equipment. This helps prevent electric shocks, electrical fires, and damage to the electrical system.

Voltage stabilization: Grounding helps stabilize the voltage levels in electrical systems. By connecting the electrical equipment to the ground, any excess electrical charge or static electricity can be discharged to the ground, maintaining a stable and safe voltage level throughout the system.

Surge protection: Grounding helps protect electrical equipment from voltage surges caused by lightning strikes, power grid fluctuations, or switching operations. When a surge of high voltage occurs, the excess energy can be safely redirected to the ground through the grounding system, preventing damage to the equipment and reducing the risk of electrical fires.

Equipment protection: Grounding helps protect electrical equipment by providing a reference point for proper operation. It ensures that all equipment components, such as metal cases or enclosures, are at the same potential as the ground, reducing the risk of electric shock when touching the equipment.

EMI/RFI mitigation: Grounding helps mitigate electromagnetic interference (EMI) and radio frequency interference (RFI) by providing a path for unwanted electrical signals to be dissipated into the ground. This helps reduce electrical noise and interference, ensuring proper functioning of sensitive electronic equipment and communication systems.

Overall, grounding is essential for electrical safety as it helps prevent electric shocks, protects equipment, stabilizes voltages, and mitigates electrical hazards. It is a fundamental practice in electrical installations to ensure the safe and reliable operation of electrical systems.

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Given:

Radius = 115.2 m

Velocity = 22.9 m/s

Mass = 1302 kg

Let's find the force required to keep the car.

To find the force, apply the formula:

Where:

m is the mass = 1302 kg

v is the velocity = 22.9 m/s

r is the radius = 115.2 m

Thus, we have:

Therefore, the force is 5926.9 N.

ANSWER:

5926.9 N

The magnitude of the momentum of the two dice system is 153g m/s when a blue 6. 5 g six sided die and a green 7. 5 g eight sided die is rolling in the opposite directions.

Given the mass of first die (m1) = 6.5g

The mass of second die (m2) = 7.5g

The velocity of first die (v1) = 12m/s

The velocity of second die (v2) = 10m/s

The momentum of a system is the product of its mass and velocity.

Thus, the momentum of the blue 6.5 g six sided die is = m1 * v1

6.5 g x 12 m/s = 78 g m/s.

The momentum of the green 7.5 g eight sided die is = m2 * v2

7.5 g x 10 m/s = 75 g m/s.

The magnitude of the momentum of the two dice system is the sum of the momentums of the individual dice: m1 * v1 + m2 * v2

78 g m/s + 75 g m/s = 153 g m/s.

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(i) The electric field lines will be farther apart as they move away from the charges since the electric field is weaker there.

(ii) The electric field lines will be farther apart as they move away from the charges since the electric field is weaker there.

The electric field is a physical field that is produced by electrically charged objects. The electric field lines are visual ways of representing the electric field. The electric field lines start on a positive charge and end on a negative charge or extend to infinity. Electric field lines never cross since that would indicate that the electric field would have two different directions at the point of intersection.

The electric field lines are drawn as arrows that indicate the direction of the electric field at a point. The strength of the electric field is proportional to the density of the electric field lines. If the electric field is strong, there will be a high density of electric field lines. If the electric field is weak, there will be a low density of electric field lines.The electric field due to a system of two charges q1 and q2 is the sum of the electric fields due to each charge.

The electric field due to a point charge q at a distance r from the charge is given by the equation E = kq/r², where k is the Coulomb constant. The direction of the electric field at a point is the direction of the electric force that a positive test charge would experience at that point. If the charges q1 and q2 have the same sign, they will repel each other. If the charges q1 and q2 have opposite signs, they will attract each other. The electric field lines for the system of two charges q1 and q2 can be drawn as follows:

(i) q1q2 > 0; q1 > q2 > 0: In this case, the charges q1 and q2 have the same sign and will repel each other. The electric field lines will start on q1 and end on q2, forming a pattern of outward-pointing radial lines. The density of the electric field lines will be higher near the charges since the electric field is stronger there. The electric field lines will be farther apart as they move away from the charges since the electric field is weaker there.

(ii) q1 q2 < 0; q1 > |–q2| < 0, |q1| > |–q2|: In this case, the charges q1 and q2 have opposite signs and will attract each other. The electric field lines will start on q1 and end on q2, forming a pattern of inward-pointing radial lines. The density of the electric field lines will be higher near the charges since the electric field is stronger there. The electric field lines will be farther apart as they move away from the charges since the electric field is weaker there.

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Answer:

C.) vector C

Explanation:

From the graph provided:

Four vectors are present :

Vectors a, b, c and d.

The x-component of the vector is its magnitude along the x-axis.

Taking the coordinate of each vector:

Vector a = (1,4) : length of x- component = 1

Vector b = (1, 1) : length of x- component = 1

Vector c = (4, -4) : length of x- component = 4

Vector d = (-3, 4) : length of x- component = - 3

Therefore, vector c has an x-component length of 4

Given

mj = 65 kg

mc = 78 kg

voj = 5.75 m/s

after collision

vfj = vfc = 0 m/s

Procedure

The law of momentum conservation can be stated as follows. For a collision occurring between object 1 and object 2 in an isolated system, the total momentum of the two objects before the collision is equal to the total momentum of the two objects after the collision.

The velocity before the collision would be 4.8m/s

Answer:

A circuit with only one path for electrons is a series circuit.

Explanation:

An electric circuit consists of a completer closed path (or paths) for electric current. A "series" circuit has only one path for the electricity to follow. A "parallel" circuit has two or more paths for the electricity.

Answer:

A object, lets say a cup. This cup will never, ever move unless something or someone disturbs it. If something touches or hits this cup the cup will move. But, until the cup gets touched, nothing will EVER make it move.

Explanation:

I hope this helps!!

The independent variable, the one that is intentionally manipulated, is whether or not the car hits the barrier.The dependent variable, the one that you measure the response in, is the distance that the washers travel.

The independent variable in an experiment is the variable that is manipulated by the researcher. It is the variable that is intentionally changed by the researcher to examine the impact of this change on the dependent variable.The dependent variable, on the other hand, is the response that is measured by the researcher.

It is the variable that is being influenced by the independent variable in an experiment. Thus, in the given experiment, the car's hitting the barrier is the independent variable while the distance that the washers travel is the dependent variable.

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When you increase the voltage of an electron beam, the radius of the beam will decrease. This is because the increased voltage causes the electrons in the beam to gain more energy, which increases their speed and therefore their momentum. As a result, the beam becomes more focused and the radius decreases.

On the other hand, when you increase the current of an electron beam, the radius of the beam will generally increase. This is because an increase in current means there are more electrons in the beam, which can lead to a more diffuse and spread-out beam. However, this effect can be mitigated by using magnetic fields to focus and shape the beam.

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If a mountain goat starts a rock slide and the rocks crash down the slope 100 m. If the rocks reach the bottom in 5 s, then the acceleration of the rock would be 8 meters/second².

The rate of change of the velocity with respect to time is known as the acceleration of the object.

As given in the problem a mountain goat starts a rock slide and the rocks crash down the slope 100 m. If the rocks reach the bottom in 5 s,

initial velocity of rock = 0 m/s

displacement = 100 meters

time = 5 seconds

s = ut + 0.5at²

100 = 0 + 12.5a

a = 100/12.5

  = 8 meters/second²

Thus, the acceleration of the rock would be 8 meters/second².

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Answer:

The answer is C. Series.

Answer:

i think it is car B because  the greater the speed, the greater the drag force acting on the vehicle

Explanation:

Following the image of the ball that have been shown;

1. Potential energy

2. Kinetic energy

3. Kinetic energy

4. Potential energy

5. Kinetic energy

6. Kinetic energy

7. Kinetic energy

Due to its position or elevation, an object has potential energy while it is at rest or is elevated above the ground. Depending on the circumstances, this potential energy may either be elastic or gravitational.

Kinetic energy, or the energy connected to motion, is present when an item is in motion. An object's kinetic energy is determined by its mass and velocity .

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Answer:

1: Potential and kinetic

2: Potential and kinetic

3: Potential and kinetic

4: potential

5: Potential and kinetic

6: Potential and kinetic

7: NEITHER

Explanation:

4 is potential because its the highest point

7 is neither because the question states "the image shows the path of a ball from the time it's thrown to the time it lands on the ground" so... 7 is when the ball has landed on the ground. therefore it has neither potential nor kinetic because it is resting.

The crate is 200 kg and the force to stop the crate is 50, then  the acceleration is 0.25 m/s²

According to Newton's second law, the mass of an object is inversely proportional to its acceleration. When F is constant, the greater the mass of an object, the smaller its acceleration. According to Newton's second law, the mass of an object is inversely proportional to its acceleration. The greater the mass of an object, the smaller its acceleration.

So, Newton's second law formula is: F = ma

F is force (N), m is mass (kg), and a is acceleration (m/s²)

In the problem given the mass of the crate is 200 kg and the force to stop the crate is 50, then the acceleration is:

F = ma

a = F ÷ m

a = 50 ÷200

a = 0.25 m/s²

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Complete Question

Complete Question is attached below

Answer:

a)Option B

b)Option B

Explanation:

a)

Without any confirmation it will be utterly wrong to conclude that high power voltage is the reason for the elevated cancer cases

Therefore

Option B

b)

The High Concentration of cells volume in a part of the Body is what causes Cancer

Therefore

Option B