3) two spherical masses attract each other gravitationally. if the distance between their centers is suddenly doubled, the gravitational force between them

Answer:

a) y = 103.21 m

b) t = 4.6 s

Explanation:

a) The height at which the balls was is given by:

\( V_{f}^{2} = V_{0}^{2} - 2g(y_{f} - y_{0}) \)

Where:

\(y_{f}\): is the final height = 0

\(y_{0}\): is the initial height =?

\(V_{f}\): is the final velocity = 45 m/s

\(V_{0}\): is the initial velocity = 0 (is held at rest

g: is the gravity = 9.81 m/s²          

Hence, the height is:

\( y_{0} = \frac{V_{f}^{2}}{2g} = \frac{(45 m/s)^{2}}{2*9.81 m/s^{2}} = 103.21 m \)

b) The time before the ball hit the ground is:

\( V_{f} = V_{0} - g*t \)

\( t = -\frac{V_{f}}{g} = -\frac{- 45 m/s}{9.81 m/s^{2}} = 4.6 s \)

Therefore, 4.6 seconds passed before the ball hit the ground.

I hope it helps you!  

The magnitude of the magnetic field at the location of the charge due to the current-carrying wire is given as B = μI/2πr.

A magnetic field is a vector field that describes the magnetic influence on moving electric charges, electric currents, and magnetic materials.

A moving charge in a magnetic field experiences a force perpendicular to its own velocity and to the magnetic field.

The magnitude of the magnetic field at the location of the charge due to the current-carrying wire is calculated as follows;

B = μI/2πr

where;

Thus, the magnitude of the magnetic field at the location of the charge due to the current-carrying wire is given as B = μI/2πr.

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The agreement must be aimed at preventing or reducing ozone depletion internationally to save the ozone layer from more damage.

The agreement must be aimed at preventing or reducing ozone depletion internationally because ozone depletion is the most dangerous cause of human activities such as chlorofluorocarbon gas. Ozone is the protective layer that can filter incoming solar radiation from harmful ultraviolet radiation. The Montreal Protocol is a global agreement to protect the ozone layer of the earth by preventing the use of chemicals that deplete it.

So we can conclude that the agreement must be aimed at preventing or reducing ozone depletion internationally to save the ozone layer from more damage.

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answer :

force is called the magnetic force of repulsion, and it happens when two magnets have the same poles (either both north or both south) and they push away from each other.

When all the domains in a material are aligned in the same direction, the material becomes strongly magnetized.

explanation :

magnetic domains in the rings were stable and strong enough to resist the force of gravity.

In the case of the levitating rings, the magnetic domains were aligned in such a way that they created a strong magnetic field, which allowed the rings to levitate in mid-air.

tiny regions within ferro magnetic  material that have their own magnetic fields are called magnetic domains.

Magnetic domains in the rings refer to the tiny regions within the ring's ferro magnetic material that have their own magnetic fields.

Answer: 60

Explanation: if u hit it it will have impact and the impact added 10n

The volume of air inside the bag when the aircraft is on the ground is 400 cm3.

Boyle's Law states that the pressure of a gas is inversely proportional to its volume when the temperature is held constant.

Boyle's Law is used in a variety of real-world applications such as scuba diving, where it is used to calculate the volume of compressed air required for a dive. It is also used in the design of compressed air systems, gas storage tanks, and other applications where the volume and pressure of gases are important factors.

The volume of air inside the bag when the aircraft is on the ground can be calculated using Boyle's Law: P1V1 = P2V2, where P1 is the initial pressure, V1 is the initial volume, P2 is the final pressure, and V2 is the final volume.

Using this formula, we can solve for V2:

V2 = (P1 x V1) / P2 = (80 kPa x 500 cm3) / 100 kPa = 400 cm3.

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Answer:

A black hole is a region of spacetime where gravity is so strong that nothing—no particles or even electromagnetic radiation such as light—can escape from it. The theory of general relativity predicts that a sufficiently compact mass can deform spacetime to form a black hole.

It is TRUE And Most large storage systems, such as those used in servers, data centers, and enterprise-level storage solutions, are based on magnetic hard disks. These disks use spinning platters coated with a magnetic material to store data. This technology has been around for several decades and has been refined over time to provide high storage capacities, reliable performance, and cost-effectiveness.
 

With the rise of solid-state drives (SSDs), which use flash memory to store data, some storage systems have started to incorporate a combination of magnetic and solid-state drives. This is because SSDs offer several advantages over traditional hard disks, including faster read and write speeds, lower power consumption, and higher durability.

While most large storage systems are still based on magnetic hard disks, the use of a combination of magnetic and solid-state drives is becoming more common as SSD technology continues to improve.

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The object travelling in a circular path with a radius of 65m and an acceleration of \(3.0 m/s^2\) has a period of motion of approximately 29.23 seconds.

To find the period of motion, we can use the formula for the period of a circular motion, which is \(T = 2\pi \sqrt(r/a)\), where T represents the period, r is the radius, and a is the acceleration. In this case, the radius is given as 65m, and the acceleration is \(3.0 m/s^2\).

Plugging these values into the formula, we get \(T = 2\pi \sqrt(65/3.0)\). Simplifying further, \(T =2\pi \sqrt(21.67)\). Calculating the square root of 21.67 gives approximately 4.651. Finally, by multiplying this result by \(2\pi\), we find that the period of the object's motion is approximately 29.23 seconds. Therefore, the period of its motion is approximately 29.23 seconds.

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When observing two asteroids of the same size, if asteroid X is hotter than asteroid Y, then asteroid X is emitting more light.

Assuming the two asteroids are at the same distance from the observer, asteroid x is emitting more light. This is because the hotter an object is, the more it emits light. The amount of light emitted by an object is related to its temperature by a law known as Wien's law, which states that the wavelength at which an object emits the most light is inversely proportional to its temperature. So, a hotter object emits more light at all wavelengths than a cooler object of the same size.

This is because hotter objects emit more light as a result of their higher temperature, which causes increased energy and radiation output.

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Solar-powered air conditioning system utilizes an adsorption chiller for cooling, with the option to switch to city electricity. Components labeled.

The designed air conditioning system utilizes solar energy for both heating and cooling of a suburban house, with the option to switch to city electricity for continuous operation. The system includes several components, including solar panels, an adsorption chiller, a heat exchanger, a fan, and a power distribution network. The solar panels capture sunlight and convert it into electricity, which powers the adsorption chiller. The adsorption chiller uses adsorbent materials to cool the air by adsorbing and desorbing refrigerant gases. The heat exchanger transfers heat between the indoor and outdoor air. The fan circulates the cooled air throughout the house. The power distribution network allows seamless switching between solar power and city electricity as needed for uninterrupted operation.

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Answer:

gas vibrates and moves freely at high speeds.

Explanation:

Hope this helps

A girl on a swing may increase the amplitude of the swing's oscillations if she moves her legs at the natural frequency of the swing. This is an example of: This phenomenon is an example of resonance.

Resonance occurs when an external force is applied to a system at its natural frequency, resulting in a significant increase in the system's amplitude. In the case of the girl on a swing, the natural frequency of the swing is determined by its length and the force of gravity. When the girl moves her legs at the natural frequency of the swing, she applies periodic impulses to the swing, synchronizing her motion with the natural oscillations of the swing. As a result, the amplitude of the swing's oscillations increases. This happens because the energy transferred to the swing with each leg movement is added constructively to the existing oscillations, leading to a cumulative effect. Resonance can be observed in various systems, from musical instruments to bridges, and it is often desirable in specific applications. Understanding the concept of resonance allows us to manipulate and control systems by applying forces at their natural frequencies to achieve desired outcomes.

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Answer:

I believe it is C but I could be wrong

Explanation:

From the picture it shows the eco/voice coming from room to room. I hope this helped have a wonderful day or night!

According to the current, the charge is 72,000 coulombs.

We need to know about current to solve this problem. Current can be defined as the flowrate of charge through the medium. It can be determined as

I = Q / t

where I is current, Q is charge and t is time.

From the question above, we know that

I = 10 A

h = 2 hours = 2 x 3600 second = 7200 second

By substituting the given parameters, we can calculate the charge

I = Q / t

10 = Q / 7200

Q = 72,000 coulombs

Hence, the charge is 72,000 coulombs.

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Answer:

hey!!

Newton's second law of motion, also known as the law of acceleration, explains the relationship between an object's mass, the applied force, and its resulting acceleration. The law states that the acceleration of an object is directly proportional to the net force acting on it and inversely proportional to its mass. Mathematically, Newton's second law can be expressed as:

F = ma

Where:

F represents the net force acting on the object,

m represents the mass of the object, and

a represents the acceleration produced by the force.

In simpler terms, Newton's second law states that the force acting on an object determines how much it accelerates. A larger force applied to an object will result in a greater acceleration, while a smaller force will produce a smaller acceleration. Additionally, if the mass of the object is increased, the same force will produce a smaller acceleration, and vice versa.

This fundamental law of motion helps us understand how forces and masses interact to produce motion. It is widely applicable and plays a crucial role in fields such as physics, engineering, and everyday life when studying the behaviour of objects in motion.

i hope this helps you :)

Explanation:

For most temperature scales, the boiling point of water and the freezing point is used to calibrate it.

Three known temperature scales;

                               Kelvin scale              Celcius scale          Fahrenheit scale

Freezing point             273K                            0°C                        32°F

Melting point                373K                          100°C                     212°F

Answer:

1.27551m

Explanation:

This is a simple energy convertion problem. Since there is no friction, and assuming no air drag and other external factors, mechanical energy should be conserved in this system.

Thus, we get:

\(KE_{initial} + PE_{initial} = KE_{final} + PE_{final}\)

We also know that the gravitational potential energy is equal to mgh, while the KE can be calculated using \(\frac{1}{2}mv^2\)

One thing to note here, is that the final KE will be 0, as there is no velocity at the end. Furthermore, we also can set the initial PE as 0 as we are looking at relative height, and at the start it is at h=0.

\(KE_{initial} = PE_{final}\)

Plugging in:

\(\frac{1}{2}*30*5^2 = 30*9.8*h\)

Solving for h, we get 1.27551m

If the masses of both planets are doubled while the distance between them remains the same, the change in the gravitational force would be four times \(2^2\) the original force.

If the masses of both planets are doubled while the distance between them remains the same, the change in the gravitational force between the two planets can be calculated using the formula for gravitational force:

F = (G × m1 × m2) ÷ \(r^2\)

where F is the gravitational force, G is the gravitational constant, m1 and m2 are the masses of the two planets, and r is the distance between them.

When the masses of both planets are doubled, the new masses would be 2m1 and 2m2. The distance between the planets remains the same.

Substituting the new masses into the formula, we get:

F' = (G × (2m1) × (2m2)) ÷ \(r^2\)

Simplifying the equation:

F' = (4G × m1 × m2) ÷ \(r^2\)

Comparing this with the original formula, we can see that the new gravitational force is four times greater than the original force.

Therefore, the change in the gravitational force is an increase of 4 times the original force, expressed as an integer.

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Answer:

Toothpaste

Because it is viscous

302.038 °K

Explanation

to conver from Fahrenheit to kelvin, we can use this formula.

then

Let

now, replace.

therefore, the answer is 302.038 °K

I hope this helps you

Answer:

a species on which other species in an ecosystem largely depend, such that if it were removed the ecosystem would change drastically. An example is a predator-prey relationship. If there was no more prey the predators may began to fall ill and die and if there was no more predators the prey would eventually over populate  

Explanation:

If both balls have positive charge,they will be attracted towards each other because of induced charges.

Ultimately, the induced charging is a charging technique that charges an item without really contacting the item to some other charged object. The charging by enlistment process is where the charged molecule is held close to an uncharged conductive material that is grounded on an impartially charged material. The charge streams between two items and the uncharged conductive material foster an accuse of inverse extremity. These were the various techniques for charge move.

When metal b is given charge,in that case both balls will get positive charge on each other,due to that try to repel each other,but for maintaining stability,we induced charge will induce in metal b on close side of the ball.Due to that now ball a has positive charge and metal b has negative charge.Therefore,they will attract each other.

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Answer:

It will take \(17.5968 s\)  to fill a bottle with water.

Explanation:

Total capacity of tube \(=227\) cm.

Rate of full up the water in the tube \(=12.9 $\mathrm{cm}^{\circ} / \mathrm{s}$\)

Total full up the tube \(=\) rate \(\times\) time

\(T=r \times t\)

\(227 \mathrm{~cm}$$=12.9 \mathrm{~cm}^{\circ} / \mathrm{s} \times t\)

\(t=\frac{227}{12.9}\)

\(=17.5968s\)

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Answer:

The star's luminosity rises above its previous level. Because it is so cool, the surface will be red, and it will be much farther away from the center than it was during the earlier stages of star evolution. Despite its lower surface temperature, the red giant has a large surface area, which makes it very luminous.

Answer:

Explanation:

Field characteristics

The strength of the field at the Earth's surface ranges from less than 30 microteslas (0.3 gauss) in an area including most of South America and South Africa to over 60 microteslas (0.6 gauss) around the magnetic poles in northern Canada and south of Australia, and in part of Siberia.

When a knowledgeable amateur astronomer tells you that she has a 14-inch telescope, the number 14 refers to the diameter of the telescope’s objective lens.

A telescope is a device used to view distant objects by utilizing electromagnetic radiation to either magnify their apparent size or gather more light than the human eye can. Telescopes are used for scientific, commercial, and amateur purposes. The telescope comprises an objective lens or mirror and an eyepiece to magnify the images created by the objective. Most telescopes have a viewfinder to make it simpler to aim the telescope precisely at the object of interest. They may also have a motorized mount to track celestial objects as they move across the sky.

Telescopes come in a variety of sizes, designs, and shapes and they range from large observatory telescopes to handheld amateur models. They are often classified into two types, reflecting and refracting telescopes and the size of a telescope is determined by the diameter of its objective lens or mirror. The bigger the diameter, the more light the telescope can collect, and the clearer the image. The diameter of the objective is the most significant aspect of a telescope when it comes to observing the heavens. For instance, a 14-inch telescope has an objective lens with a diameter of 14 inches, this large lens is capable of collecting a lot of light and providing clear images, making it a perfect tool for viewing the night sky.

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The average velocity of a car over a certain time interval is 24.1 m/s. If the velocity of the car was 33.9 m/s at the end of this interval, what was its initial velocity.

the initial velocity of the car, which can be found by using the formula;  `v_avg = (v_i + v_f) / 2`, where:v_avg = average velocity of the car over a certain time intervalv_i = initial velocity of the carv_f = final velocity of the carWe are required to find the value of v_i, hence we'll use the given information to substitute v_avg and v_f to the formula as shown below;

`v_avg = (v_i + v_f) / 2`Rearrange the formula to isolate v_i`v_i = 2(v_avg) - v_f`Now, substitute the given values to the formula to calculate the initial velocity of the car;`v_i = 2(24.1 m/s) - 33.9 m/s`v_i = 48.2 m/s - 33.9 m/s = 14.3 m/sTherefore, the initial velocity of the car is 14.3 m/s.To find the initial velocity of the car, we use the formula;`v_avg = (v_i + v_f) / 2`Rearrange the formula to isolate v_i`v_i = 2(v_avg) - v_f`We are given the value of v_avg, which is 24.1 m/s, and the value of v_f, which is 33.9 m/s.Substituting these values into the formula gives;`v_i = 2(24.1 m/s) - 33.9 m/s = 48.2 m/s - 33.9 m/s = 14.3 m/s`Therefore, the initial velocity of the car is 14.3 m/s.

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