A champion weight lifter raises a 240 kg barbell a distance of 2.1 m. How much potential energy has

the barbell gained?

Answer:

y has to be a liquid and x would be a gas

Explanation:

the closer two molecules are, greater is the force of attraction which makes them stick together and give it a structure

here y has lesser intermolecular distance so it is a liquid

particles will collide in gas though as

liquid particles have constant motion

The focal point of the solar cooker is 6.845 cm above the base.

For a parabolic reflector, the focal point (F) lies along the axis of symmetry, and the distance from the vertex to the focal point (the focus) is given by the equation:

4f = p

Where:

f = distance of the focal point from the vertex, and

p = depth of the paraboloid.

Given that the depth of the cooker is 27.38 cm, substitute this into the equation to find the focal point:

4f = 27.38 cm

f = 27.38 cm / 4

f = 6.845 cm

Therefore, the focal point of the solar cooker is 6.845 cm above the base.

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Complete question

A cannon with a muzzle velocity of 500. meters per second fires a cannonball at an angle of 30.° above the horizontal. What is the vertical component of the cannonball's velocity as it leaves the cannon?

A   0.0 m/s

B    250. m/s

C   433 m/s

D    500. m/s

Answer:

The correct option is  C

Explanation:

From the question we are told that

   The velocity is  \(v = 500 \ m/s\)

    The angle is  \(\theta = 30^o\)

Generally the vertical component of the canon ball is mathematically represented as  

          \(v_y = v * cos (30 )\)

=>       \(v_y = 500 * cos (30 )\)

=>       \(v_y = 433 \ m/s\)

Answer:

250. m/s

Explanation:

It is vertical component so you do: 500mSin(30°) = 250m/s

The correct statement is B. There is a force acting on the red positive charge that has the same magnitude and direction as the force acting on the black positive charge.

In the given scenario, there are two positive charges, one red and one black, in a simulation. It is stated that the simulation does not show an electrostatic force acting on the red positive charge. Based on this information, we can deduce that the black positive charge exerts an electrostatic force on the red positive charge.

According to Coulomb's law, like charges repel each other, which means that two positive charges will experience a repulsive force. Since the red positive charge is not experiencing any force, it implies that the force acting on it has the same magnitude and direction as the force acting on the black positive charge.

Therefore, statement B is correct. Both charges experience an electrostatic force with the same magnitude and direction, resulting in a repulsive interaction between them. The absence of a force on the red positive charge indicates that the force acting on it is balanced by other forces in the simulation.

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Answer:

1. Speed

Explanation:

"how far an object moves in a certain amount of time"

"how far an object moves"- distance

"In a " - over

"certain amount of time" - time

Distance over time is speed.

The speed of an object is the distance the object travels in one unit of time.

Hope I Helped, Feel free to ask any questions to clarify :)

Have great day!

           -Aadi x

Speed would such a block have if pushed horizontally 106 m along a frictionless track by such a laser is 0.127  m / s

First, it is necessary to find the radiation pressure on the surface. You will find it using the following formula:

P = P / (πr ^ 2) c

where P is the pressure and c is the speed of light in vacuum

P = 27 * 10 ^ 6 / π (0.2 / 2) ^ 2 * (3 * 10 ^ 8)

= 286.62×\(10^{-2}\) = 2866N / m ^ 2.

Then you must calculate the force (F) and the acceleration (a). This is done through the formulas:

F = P * (πr ^ 2)

F = 2866 * π * (0.2 / 2) ^ 2 = 0.089N

As, a = F / m

a = 0.089 / 104 =  0.00085m / s ^ 2

You can now calculate the speed.

V = √2ad

V = √2 *0.00085 * 106

V = 0.127  m / s

The complete question is: You've recently read about a chemical laser that generates a 20.0-cm-diameter, 27.0 MW laser beam. One day, after physics class, you start to wonder if you could use the radiation pressure from this laser beam to launch small payloads into orbit. To see if this might be feasible, you do a quick calculation of the acceleration of a 20.0-cm-diameter, 104 kg, perfectly absorbing block. What speed would such a block have if pushed horizontally 106 m along a frictionless track by such a laser? Express your answer with the appropriate units.

Answer:

In the given function b(t), the variable t represents the number of years after 2008. The   domain of this function is . The range more than 258.7 would not make sense. The graph of the function is always continuous

The given function b(t) shows the population of bobcats in northern Arizona since 2008. Therefore the variable t represents the number of years after 2008.

Since t represents the number of years after 2008, which is either positive or zero, therefore the domain of this function is .

The given function is a quadratic function and the coefficient of  is negative, so it is a downward parabola. The range above the y-coordinate of the vertex doesn't make any sense.

The vertex of parabola is defined by .

Vertex of the given function is (4.2,258.7).

Thus, the range more than 258.7 would not make sense for this function.

Since the given function is a polynomial function and polynomial functions are always continuous, therefore the graph of the function is always continuous

HOPE THIS HELPS <3

Answer:

it would take approximately 3 years and 2 mouths

Explanation:

To achieve this speed, they use the gravitational pulls of objects in our solar system to increase their speed. It took these two spacecraft about 3 years and 2 months to reach the ringed planet of Saturn.

Approximately 3 years and 2 mouths would be taken.

At its closest,

Saturn is 1.2 billion kilometers away from Earth. So with today's spacecraft technology, you'll need about eight years to make the trip.

To increase their speed, we use the gravitational pulls of objects in our solar system . It took these two spacecraft about 3 years and 2 months to reach the ringed planet of Saturn.

For space travel, distances are very large.

So the rate at which you travel is very important.

However, two other factors play an important role. One is that you rarely travel in a straight line between any two destinations and the other is that if you want to stop some place (like Apollo missions to the Moon), you spend a great deal of your travel time slowing down. If you can't slow down, you would just shoot right by your destination and keep going into deep space!

For example, the Apollo spacecraft took about 3 days to travel to the Moon even though it only covered a distance of about 375,000 km and at times reached a speed of 8 km/sec.

Therefore:

Approximately 3 years and 2 mouths would it take to get to Saturn travelling at the speed of an Aeroplan.

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Answer:

unperscriebed drugs can e harmful to your body

Explanation:

The function that gives the amount of radioactive material in an ore sample is a(t), where a(t) is the amount present in grams in the sample t months after the initial measurement.

An ore sample may contain radioactive material, and the amount of the radioactive material present can be calculated using a function. In this case, the function is a(t), where t is the number of months since the initial measurement, and a(t) is the amount of radioactive material present in the sample in grams.

Using this function, the amount of radioactive material in the ore sample can be calculated at any time t after the initial measurement. The function a(t) can be used to graph the amount of radioactive material present in the sample over time. It can also be used to calculate the rate of decay of the radioactive material and the half-life of the sample.To calculate the rate of decay, we can use the derivative of the function a(t).

The rate of decay is equal to the negative of the derivative of a(t), which represents the change in the amount of radioactive material over time. The half-life of the sample can be calculated by solving the equation a(t) = a(0)/2, where a(0) is the initial amount of radioactive material in the sample.

The amount of radioactive material in an ore sample can be calculated using a function a(t), where a(t) is the amount of material present in grams at time t months after the initial measurement. The function can be used to graph the amount of radioactive material over time and to calculate the rate of decay and the half-life of the sample. The rate of decay is the negative of the derivative of the function, and the half-life can be found by solving the equation a(t) = a(0)/2.

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Answer:

Bahhhhhhhhhhhhhhhhhhh perks pls

Explanation:

Answer:

Our Repelling Force Magnet Calculator shows the repelling force on a magnet that happens when another magnet of the same size is placed at some distance from it, with like poles facing one another. The force depends on the distance between the magnets. The farther apart the magnets are, the weaker the force.

Explanation:

Answer: the answer given below

(a) Explanation: The impulse on an object is given by the change in momentum of the object. Before the collision, the bullet has momentum p1 = mv0 and the brick has momentum p2 = 0, since it is stationary. After the collision, the combined bullet-brick system has momentum p3.

Conservation of momentum requires that the total momentum before the collision is equal to the total momentum after the collision:

p1 + p2 = p3

mv0 + 0 = (m + M)V

where V is the velocity of the combined bullet-brick system after the collision. Solving for V, we get:

V = (mv0) / (m + M)

The impulse on the bullet during the collision is equal to the change in momentum of the bullet:

J_bullet = p3 - p1 = (m + M)V - mv0

Substituting the expression for V we found earlier:

J_bullet = (m + M)(mv0) / (m + M) - mv0 = 0

Therefore, the impulse on the bullet is zero during the collision.

On the other hand, the impulse on the brick during the collision is:

J_brick = p3 - p2 = (m + M)V - 0 = (m + M)(mv0) / (m + M) = mv0

Therefore, the magnitude of the impulse acting on the brick is equal to the initial momentum of the bullet, mv0, and it is in the same direction as the initial velocity of the bullet.

In summary, during the collision of the bullet and the brick, the impulse acting on the bullet is zero, while the impulse acting on the brick is mv0 in the direction of the initial velocity of the bullet.

(b) We can use the principle of conservation of momentum to solve for the velocity of the brick-bullet combination just after the collision. The total momentum of the system (bullet, brick, and Earth) is conserved before and after the collision. Initially, only the bullet has momentum, which is given by p1 = m*v0, and the momentum of the brick and Earth is zero. After the collision, the bullet becomes embedded in the brick, and the combined system of the brick-bullet has momentum p2. Since the momentum of the Earth is negligible compared to that of the bullet and brick, we can treat the system as closed and apply conservation of momentum:

p1 = p2

m*v0 = (M + m)*v

where v is the velocity of the combined system just after the collision.

Solving for v, we get:

v = (m*v0) / (M + m)

Therefore, the magnitude of the velocity of the brick-bullet combination just after the collision is:

|v| = |(m*v0) / (M + m)|

The direction of the velocity is upward, as the system swings up after the collision due to the conservation of momentum.

(c) The initial kinetic energy of the system is the kinetic energy of the bullet just before the collision, which is given by:

KE1 = (1/2)mv0^2

The final kinetic energy of the system is the kinetic energy of the combined brick-bullet system just after the collision, which is given by:

KE2 = (1/2)*(M + m)*v^2

Substituting the expression we found for v:

KE2 = (1/2)(M + m)[(mv0) / (M + m)]^2

KE2 = (1/2)(m*v0^2) / (1 + M/m)

The ratio of the final kinetic energy to the initial kinetic energy is:

KE2 / KE1 = [(1/2)(mv0^2) / (1 + M/m)] / [(1/2)mv0^2]

KE2 / KE1 = 1 / (1 + M/m)

Therefore, the ratio of the final kinetic energy of the brick-bullet combination immediately after the collision to the initial kinetic energy of the brick-bullet combination is:

KE2 / KE1 = 1 / (1 + M/m)

(d)To determine the maximum vertical position reached by the brick-bullet combination, we can use conservation of energy, assuming there is no energy loss due to friction or other dissipative forces. At the maximum height, the kinetic energy of the system is zero, and all the initial kinetic energy has been converted to potential energy due to the height above the initial position.

The initial total energy of the system is the sum of the initial kinetic energy of the bullet and the gravitational potential energy of the brick:

E1 = (1/2)mv0^2 + Mgh1

where h1 is the initial height of the brick above the ground, and g is the acceleration due to gravity.

At the maximum height, the final total energy of the system is the potential energy due to the height above the ground:

E2 = (M + m)gh2

where h2 is the maximum height reached by the brick-bullet combination above the initial position.

Since there is no energy loss, we can set the initial energy equal to the final energy:

E1 = E2

Substituting the expressions for E1 and E2 and solving for h2, we get:

(M + m)gh2 = (1/2)mv0^2 + Mgh1

h2 = [(1/2)mv0^2 + Mgh1] / [(M + m)*g]

Simplifying, we get:

h2 = (1/2)v0^2 / g + h1(M/m) / (1 + M/m)

Therefore, the maximum vertical position above the initial position reached by the brick-bullet combination is:

h2 = (1/2)v0^2 / g + h1(M/m) / (1 + M/m)

Hope this helps :)

Answer:

a closed system

Explanation: it blocks matter

The system which will not exchange energy or matter with its surrounding is a closed system. Hence, option B is correct.

Work is a physics term used to describe the transfer of energy that takes place when an object changes above a distance because of an external force, at least some of which is given in the vector of the dislocation. The element of the force acting all along the path multiplied by the length of the path can be used to calculate work if the force is constant.

Mathematically, this idea is expressed as W = fd, where W is the effort and f is the force multiplied by d, the distance. Work is completed whenever the force is applied at an angle of with regard to the displacement.

As per the given data in the question, a closed system is a system in which the exchange of matter is not to take place but on the other side to an open system is able to exchange the energy as well as the matter.

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Answer:

1000 units for breakeven

Explanation:

Let x be the number of units sold at breakeven.

The total sales at the point would be $2x.

Variable costs would be $1x and fixed costs are $1000.

Total costs are = $1x + $1000

At breakeven: Sales = Costs

Sales =m Costs

$2x = $1x + $1000

$1x = $1000

x = 1000 units.

At 1000 units the sales are equal to the costs ("breakeven").

R=10+15+30

55 is the answer to the question

All but  option A: the plant is exposed to light condition must be present for the Calvin cycle reactions to occur.

The Calvin cycle is the biochemical process that takes place in the chloroplasts of plants, in which carbon dioxide is fixed into glucose molecules. This process involves several enzymes and molecules, but the energy needed to power the process comes from ATP and NADPH, which are produced during the light-dependent reactions that take place in the thylakoid membranes of the chloroplasts.

Therefore, light is required for the Calvin cycle to occur since it is the source of the energy that drives the reaction. However, all parts of the plant do not need to be exposed to light for the Calvin cycle to occur. Only the chloroplasts, which are found in the mesophyll cells of the plant, need to be exposed to light for photosynthesis to occur.

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See full question below

all but which condition must be present for the calvin cycle reactions to occur?

The plant is exposed to light

water is not involved in any of the reactions

light energy is converted into chemical energy

provide the electrons needed to reduce NADP

Valu Food Market, as an incorporated cooperative, distributes profits to its owners on the basis of the degree to which they participate in management.

In incorporated cooperatives, the distribution of profits to owners is typically based on their level of participation in the management of the cooperative. This means that the more involved an owner is in the cooperative's management and decision-making processes, the greater their share of the profits.

Cooperatives are unique business entities that prioritize the democratic participation of their members. The degree of involvement in management can vary among owners, with some actively participating in decision-making, attending meetings, and taking on leadership roles, while others may have a more passive involvement.

The principle of democratic control is a fundamental aspect of cooperative governance. It ensures that owners have a say in the cooperative's operations and that profits are distributed based on their level of active participation. This approach reflects the cooperative's commitment to fairness and equal representation.

Incorporated cooperatives, including Valu Food Market, distribute profits to their owners based on the degree to which they participate in the management of the cooperative. This system encourages active involvement and ensures that owners who actively contribute their time, knowledge, and effort in managing the cooperative are rewarded accordingly. It reinforces the democratic principles upon which cooperatives are built and fosters a sense of ownership and collective responsibility among the cooperative's members.

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There won't be another period where many brilliant discoveries are made in such a span of time because of the high degree of advancement already.

Tgis is defined as the application of scientific knowledge for practical purposes.

We have advanced technological advancement which is why there won't be many discoveries in such time span.

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This is the collision of two objects traveling in opposite or parallel directions.

The two balls start out with the same initial momentum.

P = mv

where;

As a result, each ball will have a different end momentum, with the rigid arm seeing the largest change in momentum.

Each ball experiences a separate impulse since an impulse is a change in the balls' momentum.

J = ΔP

Because the force exerted by the rigid arm should cause the ball to come to rest more quickly, it is greater to the force exerted by the relaxed arm.

Thus, we can draw the following conclusions:

For the two situations, the velocity change is different.

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In science, a hypothesis is a tentative explanation of an observation, while a scientific theory is a broader, well-tested explanation for a natural phenomenon backed by multiple lines of evidence.

In the scientific method, a hypothesis is an initial explanation or proposed solution to a specific observation or problem. It is often based on limited evidence or previous knowledge and serves as a starting point for further investigation. A hypothesis is testable and can be supported or refuted through experimentation or further observations. It represents a possible explanation that requires empirical evidence to validate or invalidate its validity.

On the other hand, a scientific theory is a well-established and comprehensive explanation for a natural phenomenon that has been extensively tested and supported by multiple lines of evidence. Unlike a hypothesis, a scientific theory goes beyond a single observation or experiment. It encompasses a broad range of observations, experimental results, and logical reasoning. A scientific theory provides a framework that can explain and predict various related phenomena. It is subject to ongoing scrutiny and refinement, but its validity and acceptance are based on its consistency with empirical evidence and its ability to make accurate predictions.

In summary, while a hypothesis is a tentative explanation of an observation, a scientific theory is a broader and well-tested explanation that is supported by multiple lines of evidence and can account for a range of related phenomena.

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Answer:

0.05773 sec

Explanation:

We know that

time = distance/speed = d/V

for air

t1 = 117/355 = 0.3295 sec

for fresh water

t_2 = 117/1480 = 0.07905 sec

for metal

t_3 = 117/5490 = 0.02131 sec

So as we can see sound will reach through metal hand rail 1st, then through fresh water and then through air

1st = metal hand rail

2nd = fresh water

3rd = air

time difference between 1st and 2nd sound = t_2 - t_3 = 0.07905 - 0.02131 = 0.05773 sec

1) The direction it points depends on the direction of the electric current in the wires.

2) The magnetic field lines in the region would form circles around each individual wire carrying current.

3) This is because of the right-hand rule

The magnetic field produced by the electric current forms a circular magnetic field around the wire in accordance with the right-hand rule, which is applicable to conventional current flow.

The current's flow direction determines the direction of the magnetic field lines. The curled fingers of your right hand, which is holding the wire with your thumb pointing in the direction of the current flow, would point in the direction of the magnetic field.

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No, the object's displacement and distance traveled will be equal; however, because the object's initial position is unknown, the object's position may differ from its displacement and distance traveled.

Because the initial position is not provided, we cannot assert that the displacement or distance equals the position. We might have arrived at a different conclusion if the starting point had been zero, because the distance from zero equals the position.

What precisely do you mean by position, displacement, and distance?

The location of an object (whether a person, a ball, or a particle) at a given point in time is referred to as its position. The displacement of an object is the difference in its position from one time to the next. Distance is the total amount the object has traveled in a certain period of time.

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The relationship between gravitational force and the distance between the centers of two planets is an inverse relationship.

According to Newton's law of universal gravitation, the force of attraction between two objects is directly proportional to their masses and inversely proportional to the square of the distance between their centers. In other words, as the distance between two planets increases, the force of gravity between them decreases.

This relationship can be explained by considering the way gravity works. Gravity is a force that results from the curvature of spacetime caused by massive objects. The more massive an object is, the more it curves the surrounding spacetime, and the stronger its gravitational pull. However, as the distance between two massive objects increases, the curvature of spacetime caused by one object becomes less and less significant on the other object. Therefore, the gravitational force between them decreases as the distance between them increases.

This inverse relationship between gravitational force and distance has important implications for our understanding of the universe. For example, it helps explain why planets in our solar system have stable orbits around the sun. As the planets move farther away from the sun, the gravitational force decreases, but their orbital speed decreases as well, keeping them in balance.

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Answer:

N = q / e    where q is the total charge on the ion and e = 1.6E-19 the charge on an electron or N = coulombs / (coulombs / electron)

Electricity and magnetism can be considered as part of the same phenomenon because both are generated by electromagnetic forces.

Electricity is the movement or flow of negatively charged electrons through a suitable conductor where a charge is applied.

Moreover, magnetism is a natural phenomenon caused by the generation/movement of electric charges.

In conclusion, electricity and magnetism can be considered as part of the same phenomenon because both are generated by electromagnetic forces.

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Answer:

A dependent variable is a variable that is tested in an experiment. An independent variable is that can be modified. Depending on what you are testing, the dependent variable will change accordingly to the dependent variable.

- I'm reading this back and it doesn't make much sense, if you want me to reword this I can