Select the statement that best describes gravity.

Gravity is the force that draws objects closer to the Earth because of the positive or negative charge.

Gravity is the force of attraction between two objects; it is dependent upon the mass of the objects and the distance between the objects.

Gravity is the force that repels two objects of similar charges; it is dependent on the number of charged particles in the objects.

Gravity is the force of attraction between objects of similar weight; it is not a strong force when objects are close to each other.

Answer: Option (a) is the correct answer.

Explanation:

Elements of group 17 are fluorine, chlorine, bromine, iodine and astatine. And, it is known that size of elements increases on moving down the group due to increase in number of electrons.

Since, atomic number of fluorine is 9 and its electronic distribution is 2, 7. So, it needs just one more electron to stabilize itself and fluorine has the smallest size as compared to rest of the atoms of its group so, it has the ability to attract an electron more strongly towards itself.

Also, due to small size nucleus of fluorine is able to pull electrons strongly towards itself. As a result, there will be increase in its reactivity.

Thus, we can conclude that the most reactive non-metal elements are found on the periodic table at the top of group 17.

Answer:

Action force and Reaction force

Explanation:

The action force which is the balanced rock pushing down due to gravity and the reaction force pushing the equal amount of force. These two things are stated in Newtons third law, where he states that "Whenever one object exerts a force on a second object, the second object exerts an equal and opposite force on the first." Also, he states that "all forces acts in pairs," meaning that every force exerted, there is an opposite force on the first.

The balance rock in Idaho remains balanced due to the forces of gravity and normal force, along with careful positioning of its center of gravity directly over its point of contact with the pedestal.

The balance rock, or any other item that seems to defy gravity by precarious balancing, relies on a couple of key forces. The first one is gravity, which pulls the rock downwards, and the second is the normal force, which is exerted by the underlying spike that stops the rock from going any further downwards. Additionally, the center of gravity of the rock is crucial. The center of gravity must be directly over the point of contact for the rock to stay balanced. If the center of gravity was not above this point, the rock would topple over as gravity pulled it downwards.

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Final answer:

The magnitude of the upward force exerted on the 15.5 kg dog by the ground is equal to the dog's weight, calculated as the product of its mass and the acceleration due to gravity. This force equals 151.9 N.

Explanation:

The question pertains to the concept of Newton's Third Law of Motion, which states that for every action, there is an equal and opposite reaction. In the context of this question, while the dog is sleeping and exerting a downward force due to gravity, the ground exerts an upward force of equal magnitude on the dog. This force is often termed the normal force.

To calculate the magnitude of this force, we use the formula for weight (W = m * g), where m is the mass of the dog (15.5 kg) and g is the acceleration due to gravity (approximately 9.8 m/[tex]s^2[/tex]). Thus, the weight of the dog, which is the force it exerts downward, is:

W = 15.5 kg * 9.8 m/[tex]s^2[/tex] = 151.9 N

The normal force will be equal in magnitude to the weight, but acting in the upward direction. Hence, the magnitude of the upward force exerted by the ground on the dog is also 151.9 N.

Final answer:

The magnitude of the upward force being exerted on the dog by the ground is approximately 151.9 N.

Explanation:

In this case, according to Newton's third law of motion, the magnitude of the upward force being exerted on the dog by the ground is equal to the magnitude of the downward force the dog exerts on the ground while sleeping. Therefore, the magnitude of the upward force is 15.5 kg multiplied by the acceleration due to gravity, which is approximately 9.8[tex]m/s^2[/tex] result, the magnitude of the upward force being exerted on the dog by the ground is approximately 151.9 N.

Answer:

b

Explanation:

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Tables are also helpful when you have a lot of different units of measurement, which can be tough to do in a graph in an simpler to read way. In contrast, graphs interact with our visual system.

A graph is a mathematical representation of a network that implies the interconnection between lines as well as points.

A graph is composed up of points with lines intersecting them. The length of the lines along with the position of the points are irrelevant. Each object in a graph is renowned to as a node.

Since they gives information quickly as well as easily, graphs and charts are also effective visual tools.

The data table is the most functional basic building block of business intelligence.

In its most basic form, it consists of a series of columns and rows that intersect in cells, plus a header row that states the names of the columns to make the table's content understandable to the end user.

Thus, this is the basic difference between the data table and a graph.

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B) The electrical conductivities would be different.

The conductivities would be different because strong acids produce more electrolytes than weak acids.

When comparing equal volumes of a stronger and weaker acid,  the electrical conductivities  of the two acids would be different as the strong acid will dissociate completely while weak acid will dissociate partially.

Acids are defined as substances which on dissociation yield H+ ions , and these substances are sour in taste. Compounds  such as HCl, H₂SO₄ and HNO₃ are acids as they yield H+ ions on dissociation.

According to the number of H+ ions which are generated on dissociation acids are classified as mono-protic , di-protic ,tri-protic and polyprotic  acids  depending on the number of protons which are liberated on dissociation.

Acids are widely used in industries  for  production of fertilizers, detergents  batteries and dyes.They are used in chemical industries for production of chemical compounds like salts which are produced by neutralization reactions.

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Final answer:

The measure of energy transferred in an electric circuit is electrical potential energy, measured in joules. Electric potential or voltage is the energy per unit charge, and power is the rate at which electrical energy is converted, measured in watts. Ohm's Law relates current to voltage and resistance.

Explanation:

The measure of energy transferred between two points in an electric circuit is known as the electrical potential energy, and it is typically measured in joules. The term related to the amount of energy per unit charge needed to move a charge between two points in a circuit is called electric potential or voltage (V). The rate at which electrical energy is converted in an electric circuit is known as power (P), and it is measured in watts. Furthermore, Ohm's Law states that the current (I) through a conductor, at constant temperature, is proportional to the voltage across the resistor.

For a resistor with a voltage of 5 V across it, to find the current, you can use Ohm's Law (I = V/R), where V is the voltage and R is the resistance. Assuming the resistance (R) is 10 ohms (which seems to be a typo for "a 10 ohm resistor"), the current through the resistor would be I = 5 V / 10 Ω = 0.5 A (amperes).

Stem cells are the source of other cells, with some referred to as totipotent or multipotent based on their differentiation potential. Transformed cells or cells from tumors can give rise to continuous or immortal cell lines that grow indefinitely in culture.

Cells that remain as sources of other cells are known as stem cells. Stem cells have the unique capacity to self-renew and differentiate into various cell types. The ultimate stem cells found in the early embryonic stages are referred to as totipotent, as they can differentiate into any cell type necessary for the development of an organism. As development progresses, stem cells can become multipotent, retaining the ability to develop into multiple, but not all, cell types within a certain lineage, such as red or white blood cells. In specific cultures, certain cells like transformed cells or those from tumors can result in a continuous cell line and exhibit characteristics such as indefinite growth in culture when the medium is replenished; these are termed cell lines or, in some cases, immortal cell lines.

Stem cells are the sources of other cells, with varying degrees of differentiation potential: totipotent, pluripotent, and multipotent. In laboratory conditions, cells can also form a continuous cell line that can proliferate indefinitely, which is often used for research and medical purposes.

Cells that remain as sources of other cells are commonly known as stem cells. These cells have the unique ability to differentiate into various cell types or continue to replicate as more stem cells. Notably, there are different potency levels of stem cells; totipotent stem cells can differentiate into any cell type or even an entire organism, pluripotent cells can become any cell type except for totipotent cells, and multipotent cells can differentiate into a limited range of cells within a lineage, such as blood cells. In a laboratory setting or medical applications, certain cells can be manipulated or derived to form a continuous cell line, which can be subcultured many times or even grown indefinitely under the right conditions. However, these cells sometimes exhibit chromosomal abnormalities and are not normal, especially if they originate from transformed cells or tumors. They may undergo transformations becoming 'cell lines' that proliferate indefinitely.

Answer:

Pie charts

Explanation:

There are mainly four types of graphs:

1. Bar graphs- It used to represent data/numbers independent of each other.

2. Pie charts- used to show data as compared to the whole. The graph is circular and numbers represent the proportion.  

3. Line graphs- used to show trend as the numbers change over a time.

4. Cartesian graphs- used to show the dependence of numbers on one axis on the numbers represented on another axis.

Answer: A)  magnesium  

Explanation:

Magnesium is a metal which has luster. It is malleable and ductile as most of the metal. It is a good conductor of heat and electricity. It is solid at room temperature.

Rest of others do not have the listed properties .

As mercury is not malleable and ductile as it is a liquid metal.

Neon is noble gas. Phosphorus is a non-metal, cannot beaten up to make sheets.

The linear velocity of the tip of a lawnmower blade is equal to 0.0515 miles per hour.

Angular velocity can be described as the rate of change of angular displacement of an object and the axis about which the object is rotating. The amount of change in angular displacement at a given period of time is known as angular velocity.

Given, a lawnmower blade spinning at 2600 revolutions per minute in a lawnmower that cuts a path that is 24 inches wide.

The frequency of the blade is f = 2600 rpm

First of all convert minutes into hours,

The frequency of the blade becomes = 2600/60 = 43.3 revolutions per hour.

The angular velocity of the blade, ω = 2πf

ω = 2 ×3.14 × 43.3

ω = 272.13 rad/hr

The diameter of the circle centered at the midpoint of the blade is the width of the path.

Diameter of the circle = 24 inches

Radius of the circle, R = 24/2 =12 inches

Let's convert inches into miles:

12 inch = 12 × 1.578 e⁻⁵ mile

R = 12 inch = 0.0001893 mile

The linear velocity of the tip of a blade, v = ωR

v = 272.13 × 0.0001893

v = 0.0515 mile per hour

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A full pan of water takes longer to boil than a half-full pan due to water's high specific heat capacity, which requires more energy to raise its temperature, and the energy used to break hydrogen bonds during the boiling phase transition.

When heating water on a stove, a full pan of water takes longer to reach the boiling point than a pan that is half full because of the high specific heat capacity of water. This means it requires a significant amount of energy to raise the temperature of water by a given amount.

A full pan of water takes longer to reach the boiling point than a half-full pan because there is more water in the full pan to absorb the heat from the burner, which causes the temperature of the water to rise more slowly. However, because there is more water in the full pan, it will take longer for the water to evaporate and reach the boiling point.

The metal pot, typically made of aluminum or another material, has a much lower specific heat capacity, so it heats up more quickly in comparison. As the water heats up and reaches the boiling point, the temperature remains constant at 100°C, despite continued heating. This is the boiling point where water undergoes a phase transition from liquid to gas, and the energy supplied goes into breaking the strong hydrogen bonds in water instead of raising its temperature further.

The example illustrates why water takes a long time to heat up, and why even when a pot is hot to the touch, the water itself may still require more time to reach the same temperature level. In essence, the water must absorb more heat to disrupt the intermolecular forces, primarily hydrogen bonding, before its particles can move faster and transition into the gas phase during boiling.

Answer:

E_kinetic=[tex]\frac{1}{2}[/tex]mν²

E_potential=mgh

Explanation:

m: mass of the body

ν: velocity of the body

g: gravity

h: height of the body

Answer:

[tex]\boxed{\bold { \large { \boxed {KE=\frac{1}{2} mv^2 \ , \ PE=mgh}}}}[/tex]

Explanation:

Kinetic energy formula

[tex]\displaystyle KE=\frac{1}{2} mv^2[/tex]

Potential energy formula

[tex]\displaystyle PE=mgh[/tex]

[tex]\displaystyle KE \Rightarrow \sf kinetic \ energy \ (J)[/tex]

[tex]\displaystyle PE \Rightarrow \sf potential \ energy \ (J)[/tex]

[tex]\displaystyle m \Rightarrow \sf mass \ (kg)[/tex]

[tex]\displaystyle v \Rightarrow \sf velocity \ (m/s)[/tex]

[tex]\displaystyle g \Rightarrow \sf acceleration \ of \ gravity\ (m/s^2)[/tex]

[tex]\displaystyle h \Rightarrow \sf height \ (m)[/tex]

Correct option is B. The idea of a spaceship landing on Jupiter is unrealistic because Jupiter is a gas giant with no solid surface and has harsh atmospheric conditions that would be dangerous for space travel.

The proposed scene in the Star Wars movie where Kylo Ren's spaceship lands on Jupiter is described best by option B.

This scenario is unrealistic in real life because Jupiter is a gas giant and thus does not have a solid surface on which a spaceship can land. Moreover, even if it hypothetically had a surface, the journey would be extremely dangerous due to the planet's harsh atmospheric conditions, including intense radiation belts, strong magnetic fields, and extreme pressures and temperatures.

Answer:

Higher than

Explanation:

By Doppler's effect, when there is relative motion between source and observer, the observer does not hear the actual frequency of the sound. The apparent frequency heard by the observer is either more or less than the source depending on whether the observer and source are moving closer or away respectively.

When the sound source moves towards the observer, the later would hear a frequency which is higher than the actual source frequency.

Answer:

This correct nswer to this would be spring tide.

Explanation:

An unusually high tide is called a _______ tide. your welcome please make the brainliest!!:)