A cartoon shows two friends watching an unoccupied car in free fall after it has rolled off a cliff. one friend says to the other "It goes from zero to sixty miles per hour in about three seconds." is this statement correct?

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.

Answer:

B:when its tangential speed is constant

Although the speed of an object that has a uniform circular motion is constant, its velocity is not constant. Not only that, but it is actually changing constantly.

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:

b

Explanation:

your welcome

Answer:to the right

Explanation:

A.

The rate of change of the area of a circle with a decreasing radius at the instant the radius is 10ft, is -40π ft²/s.

The subject of this question seems to be about the concept of rate of change specifically dealing with the changing area of a circle given a decreasing radius. The circle's area is defined by the equation A = πr². We are told the radius is decreasing at a rate of 2ft/s. To find the rate of change of the area, we can use the formula for the derivative of the circle's area with respect to time, which is dA/dt = 2πr(dr/dt). Plugging in 10 for the radius (r) and -2 for dr/dt (since the radius is decreasing), we get dA/dt = 2π*10*(-2) = -40π ft²/s. So, at the instant the radius is 10ft, the area is decreasing at a rate of 40π ft²/s.

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The rate of change of the area of a circle at the instant the radius is 10ft, while the radius is decreasing at 2ft/s, is -40π ft²/s or putting π = 3.14 we get -125.6 ft²/s.

The question is asking for the rate of change of the area of a circle when the radius is decreasing at a constant rate. Since the area of a circle is defined by the equation A = πr² , where A is the area and r is the radius, we use calculus to find the rate of change of the area with respect to time ([tex]\frac{dA}{dt}[/tex]).

When the radius r is 10ft, the derivative of the area with respect to the radius ([tex]\frac{dA}{dt}[/tex]) is 2πr.

Since the question states that the radius is decreasing at a rate of 2ft/s, we have :

[tex]\frac{dr}{dt}[/tex] = -2ft/s.

Using the chain rule, we can find the rate of change of the area by multiplying these two rates:

[tex]\frac{dA}{dt}[/tex] = [tex]\frac{dA}{dr}[/tex] x [tex]\frac{dr}{dt}[/tex].

So at r = 10ft,

[tex]\frac{dA}{dt}[/tex] = 2π x 10ft x -2ft/s,

or, [tex]\frac{dA}{dt}[/tex] = -40π ft²/s .

putting π = 3.14 we get

[tex]\frac{dA}{dt}[/tex] = -125.6 ft²/s.

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:

TITE

Explanation:

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.

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:

This correct nswer to this would be spring tide.

Explanation:

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

It is "c", and i hope it's correct. please pm me, if you need more help

To find the mass of the crate on a frictionless incline with a known force and acceleration, use Newton's second law. The mass is calculated as 40 N divided by 2.0 m/s^2, resulting in 20 kg.

To determine the mass of the crate on an incline, you can use Newton's second law of motion, which is F = ma, where F is the force, m is the mass, and a is the acceleration. In this case, we know the force applied up the incline (40 N), the acceleration of the crate (2.0 m/s2), and we need to determine the mass m. The equation can be rearranged to solve for mass by dividing both sides by acceleration, resulting in m = F/a. Thus, dividing the force by the acceleration, you get m = 40 N / 2.0 m/s2 = 20 kg. So, the mass of the crate is 20 kilograms.

Answer:

Cancer

Explanation:

To find acceleration using velocity and distance, use the kinematic equation v² = vo² + 2a(d − do). If the object starts from rest, rearrange the equation to solve for acceleration: a = (v² - vo²)/2d. Keep in mind that this approach assumes constant acceleration and ignores forces such as air resistance and friction.

To find acceleration when given distance and velocity, you can use physics' kinematic equations that relate displacement, velocity, acceleration, and time. One of these equations is v² = vo² + 2a(d − do), where v is the final velocity, vo is the initial velocity, a is the acceleration, and d is the displacement or distance.

First, to find acceleration (a), you have to ensure that the initial velocity (vo) is zero (when the object starts from rest). After this, rearrange the equation to solve for acceleration: a = (v² - vo²)/(2d). This will help you find the acceleration when you plug in your given final velocity (v) and distance (d).

Note: This method assumes a constant acceleration and does not consider forces like friction or air resistance. It's fundamental to consider this when dealing with real-world problems.

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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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