for a given input force, a ramp increases which of the following? A)height B)output force C)output work D) efficiency

Answer:

It lowers the freezing point by 30 °C

Explanation:

In the picture attached, the curve freezing point vs de-icing fluid concentration is shown. We can see that a 45% solution of de-icing fluid makes the freezing point of water -30 °C, that is, 30 °C below the pure water freezing point.

The answer is synthesis reaction

The explanation:

when synthesis reaction or direct combination reaction is a type of chemical reaction in which two or more simple substances combine to form a more complex product. The reactants may be elements or compounds. The product is always a compound

and we here

Fe2O3 + 2SiO2 → Fe2Si2O7

Fe2O3 is combined with SiO2 and form a more complex product Fe2Si2O7

so this is a synthesis reaction.

This chemical equation represents a synthesis reaction. This identification is based on the fact that the reactant chemical compounds combine to form a single chemical substance that is different from the initial chemical substance.

^sample response, will get you 100%^

Answer: (A) They are igneous.

Explanation:

Answer is Carbon-14

Radioactive isotopes have half lives. Half life is the time taken by the radioactive isotope to reduce its initial amount by half.

Oxygen-16 and Carbon-12 are stable isotopes of elements O and C respectively. Hence, they do not have half-lives. But Carbon-14 and Uranium-238 are radioactive isotopes. Among them Carbon-14 has relatively short half-life as about 5730 years while Uranium-238 has a long half-life as about 4.5 billion years.

An unbalanced force has acted on the vehicle.

Answer:

1. Answer: A, a good sentence

2. Answer: D, fragment

3. Answer: D, fragment

Explanation:

the first sentence is a complete thought, it has a subject and a verb. Both 2 and 3 are fragments, or the beginnings of sentences.

In the given examples, 'The cats ran.' is a good sentence, 'The giant turtle named Bob.' is a fragment because it lacks a verb, and 'Rolling around in the dirt.' is a fragment as it does not have a clear subject or verb. Option A, D, D is correct.

Let's practice identifying sentence faults and correct the given examples:

A mold fossil is created when an object is deposited in soft mud and is later removed by physical means or decomposition. In contrast, a cast fossil is created when a mold fossil fills with sediment.

Fossil are defined as the well-preserved remnants of plants and animals whose carcasses were buried beneath ancient seas, lakes, and rivers in sediments like sand and muck.

Mold fossil is defined as a fossil is created when silt covers the inside or outside of a dead organism and the organism's remains are buried, leaving only the rock's structure and texture to serve as a reminder of what was once within.

Thus, a mold fossil is created when an object is deposited in soft mud and is later removed by physical means or decomposition. In contrast, a cast fossil is created when a mold fossil fills with sediment.

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Answer : The correct option is, (A) The box does not move.

Explanation :

Force : It is defined as the force can be a push or a pull.

Balanced force : When the two forces are equal in magnitude and in opposite direction. These forces are balance to each other. In this force, the object does not move.

Unbalanced force : When the two forces are not equal in magnitude and direction. These forces does not balance to each other. In this force, the object will move on that side where the force will be applied more.

There are three cases :

Case 1 : [tex]F_L=F_R[/tex]

That means, when the force applied from left side are equal to the force applied from the right side then they balance to each other and object will not move.

Case 2 : [tex]F_L>F_R[/tex]

That means, when the force applied from left side are more than the force applied from the right side then the object will move towards right side.

Case 3 : [tex]F_L<F_R[/tex]

That means, when the force applied from left side are less than the force applied from the right side then the object will move towards left side.

According to question, the applied forces are equal in magnitude and in opposite direction. So, the box will not move.

Therefore, the correct answer is, A

Nitrogen, oxygen, carbon, and hydrogen are nonmetals essential for life on Earth. Nitrogen is necessary for protein synthesis, while oxygen is used in respiration and is part of essential molecules like water. Photosynthesis has played a key role in shaping Earth's atmosphere, which is unique in its balance of oxygen and carbon dioxide.

The nonmetals in the atmosphere essential for life on Earth include nitrogen, oxygen, carbon, and hydrogen. These elements are found in various combinations that are vital for different processes. Nitrogen makes up 78% of the Earth's atmosphere and is crucial for the formation of proteins in living organisms, though it's not directly usable in its gaseous form N₂. Nitrogen is a component of the Earth's atmosphere and contributes to diluting oxygen, which prevents rapid combustion. The atmosphere contains oxygen, used by all living things for aerobic respiration and essential in energy production within cells.

Oxygen is also essential for processes like combustion and is involved in the creation of molecules necessary for life, such as water (H₂O) and carbon dioxide (CO₂). Carbon and hydrogen, although less abundant in the atmosphere compared to nitrogen and oxygen, are part of vital organic molecules like glucose (C₆H₁₂O₆), which is crucial for energy production in life forms. These elements are tied to life-sustaining processes, such as photosynthesis, which maintains the balance of oxygen and carbon dioxide in the atmosphere.

Life on Earth has notably altered the composition of the atmosphere compared to other planets like Venus and Mars, which have atmospheres with very high concentrations of CO₂ due to the absence of water and mechanisms like photosynthesis that recycle carbon dioxide into oxygen. Earth's unique atmosphere, rich in oxygen and with moderate levels of carbon dioxide, is the result of these life processes.

Answer: A

Explanation: Acceleration due to gravity, denoted by (g), is the acceleration gained by an object because of gravitational force action on the object. It has a standard value 9.8m/s/s.

the answer is D temperature, pressure,and the original type of rock

The presence or absence of mineral crystals determines whether a metamorphic rock is foliated or non-foliated.

A mineral is an inorganic solid that forms in nature and has an organised atomic structure and a known chemical composition.

Even while it may seem like a mouthful, if you break it down, it becomes clearer. Minerals are created naturally.

Foliated metamorphic rocks have layers or stripes that result from the alignment and lengthening of the rock's minerals during metamorphism.

Non foliated metamorphic rocks, on the other hand, don't have the minerals that align during metamorphism and don't have layers.

Thus, The presence or absence of mineral crystals determines whether a metamorphic rock is foliated or non-foliated.

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The claim that most meteoroids burn up in the ionosphere is false.

The statement that most meteoroids burn up in the ionosphere is false. In reality, meteoroids enter the Earth's atmosphere and burn up in the mesosphere, not the ionosphere. The ionosphere is known for its high ion density, which affects radio wave propagation, but it is not where meteoroids typically disintegrate. The mesosphere, positioned above the ionosphere, is where meteoroids experience significant friction with atmospheric gases leading to their high temperatures and eventual vaporization. Most of the large meteoroids become meteors and burn up completely before reaching Earth's surface. Occasionally, some may survive the journey through the atmosphere and hit the surface, becoming meteorites.

It is commonly misunderstood that meteorites, upon landing, are hot and cause fires. However, meteorites are cold in space, and despite their fiery descent, remain largely cold inside, sometimes even developing a frost coating. This dispels the myth that a freshly fallen meteorite could start a fire. Thus, the spectacle of a bright fireball in the sky rarely ends with a meteorite hitting the ground.

B. Metamorphic rock

:)

Answer:

C. developed the theories of erosion and deposition

Explanation:

Hutton was a scottish geologist who believed that the origin of the earth was linked to molten magma and igneous rocks. His theory included the processes of erosion and deposition.

Therefore, the correct answer is C. developed the theories of erosion and deposition.

The answer is B

I'm glad I could help!

Answer:Nuclear energy is the stored potential energy in the nucleus of an atom. ... Compared to this, light energy is a form of electromagnetic radiation such that it is composed of photons, which are small packets of light energy. Each photon has a characteristic wavelength, frequency.

Explanation:

The name of an element changes when its atomic number changes. This can occur naturally through radioactive decay or artificially through a process known as transmutation, where changes are made in the number of protons in an atom's nucleus.

The name of an element changes when its atomic number changes. This happens either through natural radioactive decay processes or through artificial transmutation involving changes in the number of protons in an atom's nucleus. For example, Uranium-238, over time, naturally decays to Lead-206, signifying a change in the atomic number, hence a change in element name.

Similarly, in Accelerators or nuclear reactors, high-energy particles can be used to convert some elements into others. For instance, the bombardment of nitrogen atoms by alpha particles in a nuclear reaction can transform it into Carbon.

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Answer: The correct answer is Graph B.

Explanation:

Inertia is the property of a matter due to its mass. Due to inertia, a body resits any change in its state of rest or motion. Newton's first law is based on inertia and is also known as Law of inertia.

This law states that any body will remain at rest or in motion until and unless an external force is applied on it.

Inertia is directly related to the mass of a substance. As, the mass is more, its inertia will be more and vice-versa.

The graph will represents the direct relation is Graph B. As, the mass is increasing, the inertia is also increasing

Hence, the correct answer is Graph B.

Answer:

h20

Explanation:

The properties of water, like its polarity, capacity to form hydrogen bonds, and its high heat capacity significantly differ from the properties of its constituent elements - hydrogen and oxygen. These properties allow water to possess characteristics crucial to life such as acting as a solvent and having thermal stability. The differences demonstrate how atoms can gain new properties when they combine to form compounds.

Water, a compound composed of hydrogen and oxygen (H₂O), displays properties that differ significantly from those of its constituent elements. One major property of water is its polarity, which allows for the formation of hydrogen bonds between adjacent water molecules, contributing to unique characteristics vital for life.

For instance, water's hydrogen bonds give it a high heat capacity and heat of vaporization, resulting in temperature stability which is important for maintaining homeostasis in living organisms. The polarity of water and its hydrogen bond formation allows it to act as an excellent solvent for other polar molecules and ions. Moreover, the hydrogen bonding makes solid water or ice less dense than liquid water, a phenomenon not commonly observed in other substances. This is due to the molecules forming a crystalline structure when frozen, that is maintained by hydrogen bonding.

These properties of the water molecule such as hydrogen bonding, high heat capacity, polarity and being an excellent solvent are drastically different from the properties of individual hydrogen and oxygen atoms. Therefore, it illustrates how composition and bonding change the properties of elements when they form compounds.

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Convection currents are driven by temperature differences, gravity, and the density changes that heat induces in fluids, causing a cycle of rising warm fluid and sinking cool fluid.

The three factors that set convection currents in motion are temperature differences, gravity, and the density variations that occur as a result of heating and cooling within a fluid (which can be either a liquid or a gas). In natural convection, warmer parts of a fluid, which are less dense, rise due to buoyant forces, whereas cooler, denser parts sink. This movement can result in the transfer of heat. An example of this is seen in the circulation of air in Earth's atmosphere, where warm air from the equator rises and moves toward the poles while cooler air sinks and moves toward the equator. This entire process is driven by the temperature differences between different parts of the fluid and the action of gravity which acts on the differences in density that temperature changes create.

Answer:

the awnser is 2

Explanation: