Mr. wang works in a recycling center. recyclable materials arrive at the center mixed together. workers use magnets to separate steel cans from other items. which two statements are true about the force between a steel can and a magnet? *
1 point
the attraction between the can and the magnet is a pull.
gravity pushes the can toward the magnet.
the force between the can and the magnet is a noncontact force.
the attraction between the can and the magnet is a push.

Answer:

Both are chemical change as the new product is formed with new characteristics and can't be brought back to previous form.

According to Newton's third law of motion, for every action, there is an equal and opposite reaction.

According to Newton's third law of motion, for every action, there is an equal and opposite reaction.

If a birthday candle is pushing down on a cake with a force of 0.02N, there must be an equal and opposite force acting on the candle. In this case, the cake exerts an upward force of 0.02N on the candle.

The cake's force is a reaction to the candle's downward force, and it balances out the candle's force, resulting in a net force of zero.

This means that the candle and the cake are in a state of equilibrium.

The two forces, one downward and one upward, occur simultaneously and are of equal magnitude but act in opposite directions, fulfilling Newton's third law of motion.

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Radii is a vital feature of the elements, and it can be useful in determining the characteristics of elements in various chemical and physical processes. The radii of atoms and ions of the same element differ due to their various charge and mass characteristics.

Atomic and ionic radii increase as you move down a group on the periodic table, and decrease as you move across a period from left to right due to increased nuclear charge, making the electrons closer to the nucleus. The size of an atom and ion also changes due to the number of electrons charge, and electronic configuration.In order of increasing radius, the arrangement of \(Ne, F-, O2-, Br-, Rb\) is given as follows:

\(Ne < F- < O2- < Br- < Rb+\)

Rb+ has the smallest radius due to its large nuclear charge and fewer electrons in the valence shell.

As a result, they are larger than Rb+. O2- has more electrons than Ne and is the largest among the given ions and atoms. It is important to note that in certain conditions, the trends in radii may not be valid because of hybridization and other factors. Nonetheless, this arrangement is valid for the given ions and atoms.

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Answer:The disturbance created by a source of sound in the medium travels through the medium and not the particles of the medium

Explanation:i hope this is right

Answer:

B small positive charge

Explanation:

Answer:If a hole is dug into the ground deep enough that it reaches a confined aquifer, the pressure can be great enough to shoot water up the well without any help from a pump. Such a well is called a flowing artesian well

Explanation:

The acceleration of the cart at this instant is calculated to be 5.17 m/s² to the right.

Newton's second law explains that acceleration of any object is directly related to net force and inversely related to the mass.

To determine the acceleration of the cart, we need to calculate the net force acting on it.

The net force is the vector sum of the two forces:

Net force = Force a + Force b = 77 N to the right - 15 N to the left = 62 N to the right

Using Newton's second law, F = ma, where F is the net force and m is the mass of the cart, we can calculate the acceleration:

a = F/m = 62 N / 12 kg = 5.17 m/s

Therefore, the acceleration of the cart at this instant is 5.17 m/s² to the right.

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Answer: Uh here

Explanation:

s=h=20

a=g=±10m/s=10m/s (since it is dropped)

v^2-u^2= 2as

v^2=2x10x20 (u=0; it is dropped not thrown)

v=20m/s

for calculating time

we know,

v=u+at

20= 0+ 10xt

t=2seconds

thus, it will attain a speed of 20m/s before touching the ground, but the time taken to reach the ground is 2seconds. Because the velocity is not uniform but acceleration/gravity is. If still there is any confusion. Try the same problem with 80 of height.

Answer:

D

Explanation:

Study habits include, how you prepare for assignments, what questions you ask your teacher, and How you take tests, all of these come under study habits, therefore the correct answer is option D.

The deliberate evidenced based quest and application of information and comprehension of the natural implications for society is what is known as research.

Science is a methodology of discovering more about the world.

People may contribute to the development of new knowledge through science and utilize it to promote their objectives.

A student's study habits include factors like how they approach tasks, questions they ask their professors, and how they prepare for the exam

Thus, the correct answer is option D.

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A ball is thrown vertically upward with a velocity of 20m/s from the top of a multistory building. The height of the point where the ball is thrown is 25 m from the ground. The height will the ball rise is 20m. 5s long will it be before the ball hip the ground.

The direction of a body or object's movement is defined by its velocity. In its basic form, speed is a scalar quantity. In essence, velocity is a vector quantity. It is the speed at which distance changes. It is the displacement change rate.

A. for solving how high will ball go , velocity at the top point will be 0 this gives ,

s = v² - u² / 2a

= 0 - 20² / -2 × 10

= 20m

B. Time to reach maximum height can be obtained from v = u + at

0 = 20 + ( − 10 ) t

t = 2s

s = ut + 0.5at²

= 20 ( 2 ) + 0.5 ( −10 ) ( 2 )²

= 20m

Therefore, the total distance for maximum height is 45 m

s = ut + 0.5at²

45 = 0 + 0.5 ( 10 ) ( t )²

t = 3s

Then,

Total time = 3+2

= 5s

Thus, A ball is thrown vertically upward with a velocity of 20m/s from the top of a multistory building.The height will the ball rise is 20m. 5s long will it be before the ball hip the ground.

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The output force on the piece of food the chopsticks pick up is mechanical advantage times 3 N.

The force amplified by utilising a tool, mechanical device, or machine system is known as mechanical advantage. To achieve the desired output force amplification, the gadget trades off input forces against movement.

Mathematically:

mechanical advantage = output force/input force

Given that input force = 3 N.

Hence, output force = mechanical advantage × 3 N.

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Heat is a form of energy.

When heat is provided to any object, the molecules, and atoms of the object gain heat energy.

This energy results in an increase of kinetic energy of the molecules, which vibrate faster with more speed.

If more amount of heat is provided to the object, this results in the breaking of intermolecular forces, and the object changes its state(from solid to liquid).

Thus, objects when heated up gain energy which increases the internal energy of the object.

Answer:

These two skaters have just pushed off against one another .One skater has twice the mass as the other. Which one willexperience the greater momentum?

Explanation:

mark Brainliest

Given that,

Mass of a ball = 300 kg

To find,

The gravitational force acting on the ball.

Solution,

The force acting on the ball is force of gravity. It is equal to the weight of the ball.

W = mg

Substitute the value of m and g in the above formula

W = 300 kg × 10 m/s²

= 3000 N

Therefore, the ball attracts with a force of 3000 N.

Answer:The height of the mercury column is a measure of the atmospheric pressure pushing down on the pool of mercury. The pressure of the atmosphere can be calculated using the equation:

P = ρgh

where P is the pressure in Pascals (Pa), ρ is the density of mercury (13,595 kg/m³), g is the acceleration due to gravity (9.81 m/s²), and h is the height of the mercury column (687 mm = 0.687 m).

First, we need to convert the density of mercury from kg/m³ to g/cm³ to match the units of the height:

ρ = 13,595 kg/m³ = 13.595 g/cm³

Now we can plug in the values and solve for P:

P = ρgh

P = (13.595 g/cm³) x (9.81 m/s²) x (0.687 m)

P = 101,325 Pa

Finally, we can convert the pressure from Pascals to atmospheres:

1 atm = 101,325 Pa

P(atm) = P(Pa) / 101,325 Pa/atm

P(atm) = 101,325 Pa / 101,325 Pa/atm

P(atm) = 1 atm

Therefore, the pressure of the atmosphere around the pool of mercury is 1 atmosphere (atm).

Explanation:

According to the illustration, the graphic illustrates the arrow and the intended target.

To target something or someone means to aim at them specifically. To aim a gun at a shooting range is an example of a target. To focus all of your efforts on one objective is an example of a target. verb. A target is an item or objective that is the subject of an aim.

Two or three arrows have been depicted in the green area of the image, which is located very distant from the red location. Given that they are all in the same location, this illustrates the idea of weak or low precision and excessive precession.

As a result, choice B is accurate.

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The initial velocity of the train is 20m/s when the train decelerates uniformly at a rate of 2m/s2. It means that initially, at time = 0 seconds, the train was moving with a velocity of 20m/s.

We know that,

v = u +at

where, v = final velocity

u = initial velocity

a = acceleration

t = time taken

In this case, as the train is decelerating we will use a negative sign with acceleration.

Substituting the values we get,

v = u + (-2)(10)

v will be equal to zero, as the train comes to a stop.

0 = u - 20

u = 20 m/s

Hence, the initial velocity of the train is 20m/s when the train decelerates uniformly at a rate of 2m/s2 and comes to a stop in 10 seconds.

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Alice is weightless because she is in free fall.

Free-fall occurs when an object is experiencing the force of gravity but is not experiencing any other forces, such as air resistance. Because Alice is in a spacecraft, air resistance is not a factor, so she is essentially in a vacuum.

When an object is in a vacuum, the only force acting upon it is gravity. Therefore, Alice is in free fall and is experiencing weightlessness. This is in contrast to you, who is experiencing 1g of acceleration due to the force of the engine of your spacecraft.

This force is greater than the force of gravity, so you are not in free fall, and thus you are feeling the effects of the gravitational field.

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The correct statement include:

(a) An object can gain a static charge by gaining or losing protons.

(b) Static charges are transferred between objects until both have the same charge or no charge.

(d). Different objects can gain or lose static charges at different rates.

Static charges are transferred between objects until both have the same charge or no charge:

When two objects come into contact, or are placed near each other, electrons can be transferred from one object to the other. The object that loses electrons becomes positively charged, and the object that gains electrons becomes negatively charged. This transfer of electrons continues until both objects have the same charge or no charge.

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Explanation:

AVERAGE speed is   (144 - 0 ) /2 = 72 km/hr = 20 m/s

then in 20 swconds    20 m/s * 20 s = 400 meters

Answer: 40 miles

Explanation:

The Available options are:

A. Award an indirect free kick to Team B for incidental contact.

B.  Award a direct free kick to Team B.

C.  Allow play to continue as the handling was incidental but issue a caution to the player at the next stoppage of play.  

D.  Allow play to continue.

Answer:

Allow play to continue.

Explanation:

IFAB (International Football Association Board) has approved various means to clarify the issue of handball in foodtball.

Hence, some of the cases include:

1. Should the the ball touches a player's hand/arm immediately from their own head/body/foot or the head/body/foot of another player.

2. the ball touches a player's hand/arm close to their body and has not made their silhouette unnaturally bigger.

3. a player is falling and the ball touches their hand/arm when it is between their body and the ground (but not extended to make the body bigger).

4. Additionally, should the goalkeeper attempt to clear a ball from a teammate but fails, the goalkeeper is allowed to handle the ball.

Hemce, Since a14 who did not see the ball coming and the ball strikes her in the back of the hand as her hand is at her side. the proper call would be to: ALLOW PLAY CONTINUE

Answer:

Explanation:

The big bang theory explained that the universe started as a single entity which was created by massive explosion and it create most of the matter i.e galaxies were moving away from the universe in all directions with great speed which then cause massive explosion and bring about cosmos creation.

Static electricity can be both an enemy and a friend depending on the situation.

Static electricity is a well-known electric phenomenon that involves the transfer of charged particles from one body to another. As a friend, static electricity is used in various technologies such as electrostatic spraying, electrostatic printing, and electrostatic precipitators.

However, as an enemy, static electricity can cause sparks that can ignite flammable materials, cause electronic devices to malfunction, and shock people. Static electricity can also cause clothing to cling together or hair to stand on end, which can be annoying but is generally harmless.

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The velocity of car A after the collision is 1.72 m/s in the opposite direction of its initial velocity.

We can use the conservation of momentum to solve for the velocity of car A after the collision.

The initial momentum of the system is:

p_initial = m_A * v_A + m_B * v_B

= 281 kg * 2.82 m/s + 281 kg * (-1.72 m/s)

= 0 kg m/s

Since momentum is conserved, the final momentum of the system is also zero:

p_final = m_A * v_A' + m_B * v_B'

= 0 kg m/s

Where

Solving for v_A', we get:

v_A' = -(m_B / m_A) * v_B

Substituting the given values, we get:

v_A' = -(281 kg / 281 kg) * (-1.72 m/s)

= 1.72 m/s

Therefore, the velocity of car A after the collision is 1.72 m/s in the opposite direction of its initial velocity.

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Fuse, breakers, and other overcurrent protection devices set an appropriate current limit and sever short circuits.

The size of the overcurrent protection system depends on the overcurrent protection system type and the maximum current that can travel through the circuit components. National codes specify the size and design of the overcurrent protection system. The size of the overcurrent protection devices is typically determined by the array's short-circuit current.

The PV is a limited current source, meaning that the short-circuit current is the highest current produced by this source, which is the major justification for choosing the array's short-circuit current.

The distribution lines of electric grids integrated with DER are safeguarded by an overcurrent protection system. The phase overcurrent protection and the ground overcurrent protection are two further classifications for this protection strategy. Depending on the distribution method, the relays employed in such schemes could be either directional (functioning for in-front events) or nondirectional (working for all). Radial distribution systems are where nondirectional relays are most frequently employed.

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Explanation:

F =(frac{1}{4{pi}{varepsilon}_o}) x (frac {q_1q_2}{r^2})

F =(frac {5 {times} 10 {times} 8 {times} 10}{0.002 {times} 0.002}) x 9 x 10

F = 900N

The potential difference across the ends of a wire is doubled in magnitude. If ohm’s law is obeyed, the resistance is not changed. Thus, option A is correct.

The current is the stream of charges which flow inside the conductors when connected across the end of voltage.

From Ohm's law, V =IR

Here, R is the proportionality constant called the resistance of the resistor.

The complete question is given in the image attached.

The potential difference across the ends of a wire is doubled in magnitude.2V = IRR =2 V/IAs, the resistance is a constant value, it does not change.

The following statements concerning the resistance of the wire true is :

The resistance is not changed

Thus, the correct option is A.

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The force F1 is equal and opposite to the downward force thus, F1 is equal to 60 N. The force F2 is inclined to 30 ° from leftward force and it is equal to 38.97 N in magnitude.

Force is an external agent acting on a body to deform it or to change its state of motion or rest. Force is a vector quantity and it is characterised by its magnitude and direction.

If two forces acting on a body from the same directions, then the net force will be the sum of these two forces. If they are acting from opposite directions, they will cancel each other in magnitude.

The force F1 is equal and opposite to the force acting downward. Thus its magnitude is 60 N. The force F2 is inclined to 30 ° from horizontal direction.

F2 = 45 cos 30 = 38.9 N.

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The velocity of the ion released from rest and accelerated through a potential difference of 152V is 6.34 × 10^5m/s.

The electric potential difference is a scalar quantity that measures the energy required per unit of electric charge to transfer the charge from one point to another. The electric potential difference between two points in an electric circuit determines the direction and magnitude of the electric current that flows between those two points. A lithium-ion containing three protons and four neutrons has a mass of 1.16 × 10-26 kg. The ion is released from rest and accelerates as it moves through a potential difference of 152 V.

The change in electric potential energy of an object is equal to the product of the charge and the potential difference across two points. The formula to calculate the velocity of the ion released from rest and accelerated through a potential difference of 152V is:

v = √(2qV/m) where q is the charge of the ion, V is the potential difference, and m is the mass of the ion.

Substituting the values in the formula, we get:

v = √(2 × 1.6 × 10-19 C × 152 V/1.16 × 10-26 kg)v = 6.34 × 10^5m/s

Therefore, the velocity of the ion released from rest and accelerated through a potential difference of 152V is 6.34 × 10^5m/s.

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