A stone of mass 40 kg sits at the bottom of a bucket. A string of length 1.0 m is attached to the bucket and the whole thing is made to move in circles with the speed of 4.5 m/s. What is the magnitude of the force the stone exerts on the bucket at the lowest point of the trajectory? 12 16 14 10 18 What work should be done by an external force to lift a 2.00 kg block up 2.00 m? O 59 J 98 J 78 J 69 J O:39 J

Ideally in no air resistance, the ball will return to the thrower's hand with a speed of 10 m/s. Thus, the correct option is B.

Speed is the distance covered by an object with respect to time taken. It can also be defined as the change in the position of an object with respect to time. It is a scalar quantity as it has only magnitude and no direction.

The ball which is thrown straight upward in the sky with a speed of 10 m/s will return back to the thrower's hands with a speed of 10m/s in the ideal case of no air resistance because during this situation, no acceleration takes place. At the highest point, the velocity of the ball is zero however the ball is still under the influence of gravity, here the acceleration due to gravity is acting downwards on the ball.

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The specific heat capacity is like having capacity to acquire or absorb heat. Because of this, object A will have higher specific heat capacity than object B

The specific heat capacity of a substance is the quantity of heat required to raise the temperature of unit mass of the substance by one kelvin.

Given that Object A and object B are both heated to 200 Celsius. Object A must absorb 4,000J of heat energy to reach a temperature of 200 Celsius, while object B must absorb 2,500J of heat energy to reach a temperature of 200 Celsius.

Since both are heated to the same temperature, that mean object A has large heat capacity to absorb 4,000J of heat energy to reach a temperature of 200 Celsius. While object B has a less heat capacity to absorb 2,500J of heat energy to reach a temperature of 200 Celsius.

Therefore, object A has the higher specific heat capacity than object B

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Answer:

The inverse square law proposed by Newton suggests that the force of gravity acting between any two objects is inversely proportional to the square of the separation distance between the object's centers. Altering the separation distance (d) results in an alteration in the force of gravity acting between the objects.

Explanation:

Answer:

action and reaction forces.

Explanation:

Newton's first law of motion states that "An object at rest stays at rest and an object in motion stays in motion with the same speed and in the same direction unless acted upon by an unbalanced force." Objects tend to "keep on doing what they're doing." In fact, it is the natural tendency of objects to resist changes ...

Answer:

Centripetal force is defined as, "the force that is necessary to keep an object moving in a curved path and that is directed inward toward the center of rotation.

Explanation:

Just a few examples are the tension in the rope on a tether ball, the force of Earth's gravity on the Moon, friction between roller skates and a rink floor, a banked roadway's force on a car, and forces on the tube of a spinning centrifuge. Any net force causing uniform circular motion is called a centripetal force.

Answer:

O The resistor decreases the current by transforming electrical energy into different types of energy

Explanation:

resistors convert elec energy to heat

Answer:

D

-CONNECTIONS

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much love! <33

Answer:

4. meter rod​

Explanation:

The length of an object is dimension that expresses how long the object is. It is measured in meters as the SI unit.

From the given question, to determine the length of a given table, the appropriate instrument that should be used is a meter rod. This would make it possible to measure in meters and know the exact dimension of the object with respect to how long it is.

A meter rod has a length of 1 m (100 cm), and can be easily used for the purpose.

The weight of the transformer is 138.46 N.

Weight can be calculated by dividing workdone by height

To calculate the weight of the transformer, we use the formula below.

Formula:

Where:

Substitute these values into equation 1

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Answer:

40

Explanation:

30

Answer:

We know that F=ma

the force required depends on acceleration as well as the mass.

if a person has bag means the total mass is of course large

so force is also large

then it becomes difficult

The mass of the ball remains constant, the impulse for a single trial would be the same even if the ball bounced back to its original height, since the impulse is zero.

Impulse is defined as the product of force and time, and it is represented as

I = FΔt,

where

I is the impulse,

F is the force,

Δt is the change in time.

Impulse also equals the change in momentum. Therefore, impulse can be calculated by using the following equation:

I = m * (Vf - Vi),

where

I is the impulse,

m is the mass of the object,

Vf is the final velocity,

Vi is the initial velocity.

Therefore, the impulse for a single trial would be the same if the ball bounced back to its original height (had a perfectly elastic collision with the floor).

As we know, Impulse is the change in momentum of an object, and the momentum is the product of mass and velocity. Mathematically,

Impulse = change in momentum

I = m * Δv

The product of the mass of an object and the change in its velocity is defined as the Impulse. This means that the impulse will be equal to the change in the velocity of the object multiplied by its mass.

The formula for the impulse in the case of an object colliding with a surface can be written as:

I = Ft

where,

Impulse (I) is equal to the force (F) applied on the object multiplied by the time period (t) for which the force is applied.

Now, let's discuss the second part of your question,If the ball bounced back to its original height, which means it has a perfectly elastic collision with the floor. So, we know that the perfectly elastic collision is the collision in which the two objects collide and bounce off each other with no loss of kinetic energy. In this case, the ball will rebound back with the same velocity as before, and the momentum will change, but its value will be the same.

Now we can use the impulse-momentum theorem and the conservation of energy to solve this problem:

According to the impulse-momentum theorem, the impulse experienced by the ball is equal to the change in momentum of the ball.

Therefore, we can write:

Impulse = Change in Momentum

I = m * (Vf - Vi)

Since the ball bounces back to its original height, the final velocity (Vf) is equal to the initial velocity (Vi). This means that the change in velocity (Δv) is equal to zero. Therefore, the impulse is also equal to zero. Since the mass of the ball remains constant, the impulse for a single trial would be the same even if the ball bounced back to its original height.

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\(ke = \frac{1}{2} m {v}^{2} \)

\(44 = \frac{m {4}^{2} }{2} \\ \frac{88}{16} = m \\ 5.5 = m\)

We shall consider two properties to illustrate the experiment:

1. Temperature difference

2. Thermal conductivity of the material

Use a steel or other suitable material cylindrical rod that has insulation all the way around it.

The rod is submerged in water at 40 degrees Celsius and a large reservoir of water at 100 degrees Celsius on opposite ends. The cold water is kept in a cylinder that is completely insulated. A thermometer measures the cold water's temperature over time.

This experiment will show that

(a) heat flows from a region of high temperature to a region of lower temperature.

(b) The thermal energy of a body increases when heat is added to it, and its temperature will rise.

(c) The thermal conductivity of water determines how quickly its temperature will rise. If mercury replaces water in the cold cylinder, its temperature will rise at a different rate because its thermal conductivity is different

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The gravitational acceleration of the planet on an object of mass 2 kg is 8 m/s²

The mass of the object = 2 kg

The weight of the object on that planet = 16 N

The gravitational acceleration can be found using the formula,

                   W = mg

where W is the weight of the object on that planet

           m is the mass of the object

           g is the gravitational acceleration

Let us rearrange the above equation,

                 g = W/m

Let us substitute the known values in the above equation, we get

                 g = 16 / 2

                    = 8 m/s²

Therefore, the gravitational acceleration of the planet is 8 m/s²

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Answer:

it would decrease i think

Explanation:

Answer:

HMMMMMM??????

Explanation:

Answer:

The value of the resistance is 3.99 kΩ

Explanation:

The value of the resistance, given that a heart pacemaker fires 89 times a minute, and each time a 36.0-nf capacitor is charged to 0.632 of its full voltage, is 3.99 kΩ.

How to determine the value of the resistance?

We know that a pacemaker fires 89 times per minute, charging a 36.0-nf capacitor each time, and the capacitor is charged to 0.632 of its full voltage.

The formula for determining the time constant is: τ = RC and the formula for determining the voltage of a capacitor as it charges is: Vc = Vmax(1 - e^(-t/τ)) Using the following information, we can compute the value of the time constant:

τ = RCτ = (0.632Vmax * C) / IV max = 9 V The value of the time constant is τ = RC = (0.632Vmax * C) / I = (0.632 * 9 * 10^-3) / I = 5.67 * 10^-3 / I To find the value of the resistance, R, we'll use the frequency of the pacemaker (f = 89/60 Hz), which is the number of times it fires per second.

RC = 1/fRC = (5.67 × 10^-3)/IR = RCfR = [(5.67 × 10^-3)/I](89/60)R = 3.99 kΩ

Therefore, the value of the resistance, given that a heart pacemaker fires 89 times a minute, and each time a 36.0-nf capacitor is charged to 0.632 of its full voltage, is 3.99 kΩ.

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Explanation:

Veins carry deoxygenated blood from different parts of the body to our heart. ... Since a larger volume of blood is collected in the right auricle than that of the left auricle, right auricle is larger than the left auricle.

One environmental law that natural gas companies have managed to secure exemptions from is the Safe Drinking Water Act (SDWA) under the Energy Policy Act of 2005 in the United States. The SDWA is a federal law that establishes standards to protect public drinking water supplies from contamination.

Under the Energy Policy Act of 2005, a specific exemption known as the "Halliburton Loophole" was included, which exempts hydraulic fracturing, or fracking, operations from certain provisions of the Safe Drinking Water Act (SDWA) . This exemption means that companies engaged in fracking activities are not subject to the same regulations and requirements as other industries that may pose potential risks to drinking water sources. The rationale behind this exemption was to facilitate the growth of the natural gas industry and encourage domestic energy production. However, critics argue that it undermines environmental protection efforts by allowing potential contamination of underground water sources due to the use of chemicals and the release of methane gas during the fracking process.

The exemption from the SDWA highlights the influence of the natural gas industry in shaping environmental regulations and the ongoing debate surrounding the balance between energy development and environmental conservation. It emphasizes the need for careful consideration and evaluation of the potential environmental impacts associated with energy extraction activities.

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Answer:

A)250-240

=10+960

=970

The set of two charges experiencing the strongest attraction is charges of +2 C and -2 C, separated by 1 m. Option A.

+2 C and -2 C is an attracting force because the charges are opposite

For Charges of +2 C and -2 C the force of attraction between two charges is directly proportinal to the product of their charges and inversely proportional to the square of the distnce between them.

The product of the charges is 2 × -2 = -4 C², and the square of the distance between them is 1² = 1 m².

The force of attraction between these two charges is -4 / 1 = -4 N.

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The PFT or physical fitness test is a set of measures designed to determine the level of physical fitness.....

The decibel level of a pin drop is -47.8 dB. The negative sign indicates that the pin drop sound is significantly quieter than the reference sound intensity.

For the decibel level of a pin drop,

dB = 10 × log10(I/I₀)

Where I is the sound intensity being measured and I₀ is the reference sound intensity,

Sound intensity = 1 / 3000

I/I₀ = 1/30000

log₁₀(I/I₀) = log₁₀(1) - log₁₀(30000) = 0 - log₁₀(30000) = -4.78

dB = 10 × (-4.78) = -47.8

Hence, the decibel level of a pin drop is -47.8 dB. the negative sign indicates that the pin drop sound is significantly quieter than the reference sound intensity.

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Answer:

I would say b.rainforest

The magnitude of the second charge is 3.01 x 10⁻⁵C.

The second charge is positive.

The magnitude of the second charge is determined by applying Coulomb's law of electrostatic force as shown below.

F = kq₁q₂/r²

where;

Substitute the given parameters, and solve for the magnitude of the second charge as shown below.

q₂ = Fr²/kq₁

q₂ = (65 x 0.5²) / (9 x 10⁹ x 6 x 10⁻⁵)

q₂ = 3.01 x 10⁻⁵C

Thus, the magnitude of the second charge is 3.01 x 10⁻⁵C. Also, since the force is attractive, the second charge must be positive.

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Answer:    75n,a * (12m)

Explanation I'm trying to understand the question but this is what i got.

Happy Holidays!

We can use the following equation to calculate work done on an object.

W = F · d

Work (J) = Force (N) · displacement (m)

Plug in the given values into the equation:

W = 75 · 12 = 900 J

Answer:

Newton's third law of motion states that whenever a first object exerts a force on a second object, the first object experiences a force equal in magnitude but opposite in direction to the force that it exerts. ... Newton's third law is useful for figuring out which forces are external to a system.

Explanation:

is these what you're looking for?

Option (a).

A converging lens is used to make a magnifying glass, which works by bending light to create a magnified image.

The curved surface of the lens helps to focus and magnify the object being viewed.

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Answer:The density of a substance is defined as its mass per unit volume. So we can calculate the density of silver using the given values:

density = mass / volume

Substituting the given values, we get:

density = 21 g / 2 cm^3

Simplifying, we get:

density = 10.5 g/cm^3

Therefore, the density of the piece of silver is 10.5 g/cm^3, which is option D.

Explanation:

A 3.1-mm-diameter wire carries a 14 A current when the electric field is 6.9 x 10{eq}^{2} {/eq} V/m. The wire's resistivity would be 3.69 x 10^{-8} Ω·m.

Calculating the resistivity of a wire:

To solve this problem, we can use Ohm's Law, which states that the current through a conductor is proportional to the electric field and inversely proportional to the resistance of the conductor. We can use the formula:

I = (E * A) / ρ

where I is current, E is the electric field, A is the cross-sectional area of the wire, and ρ is the resistivity.

We are given the current I, the electric field E, and the diameter of the wire, which we can use to calculate the cross-sectional area A:

A = π * (d/2)^2
A = π * (3.1/2)^2 * 10^{-6} m^2
A = 7.55 x 10^{-6} m^2

Substituting the given values into the formula for current, we get:

14 A = (6.9 x 10^{2} V/m) * (7.55 x 10^{-6} m^2) / ρ

Solving for ρ, we get:

ρ = (6.9 x 10^{2} V/m) * (7.55 x 10^{-6} m^2) / 14 A
ρ = 3.69 x 10^{-8} Ω·m

Therefore, the wire's resistivity is 3.69 x 10^{-8} Ω·m.

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