Please help on this one? PLEASE.

Answer:

The answer is B) Conduction

: Conduction is the AWNSER

Explanation: just trust me

Answer:

Graduated Cylinder

Explanation:

looked it up         ⊕↔⊕

Liquid volume can be measured using a graduated cylinder or a burette, and the specific density of liquids can be assessed with a hydrometer. Accurate readings are taken at the bottom of the meniscus.

The instrument used to measure liquid volume is a graduated cylinder, which comes in various sizes and is commonly used in laboratory settings. It allows for precise measurements of volumes by sub-dividing the space between milliliter marks. Another instrument used in chemistry for measuring liquid volume is the burette, especially when conducting titrations. Furthermore, a hydrometer can be employed to measure the specific density of liquids, which indirectly helps infer volume based on known densities.

To obtain accurate volume measurements with a graduated cylinder, one should read the volume at the bottom of the meniscus, which is the lowest point of the curved surface of the liquid. It's also essential to ensure that the graduated cylinder is level and that the observer's eye is at the level of the meniscus while making the reading.

Answer:

the primary function of the Calvin cycle is to make organic products plants need, using the products from the light reactions of photosynthesis (ATP and NADPH).

Explanation:

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The fraction of the real tract that was created is A. 1/4.

From the complete question, the model that was created is 2.25m long.

Therefore, since the real gi tract is 9 meters long, the fraction of the model created will be:

= 2.25/9

= 1/4

In conclusion, the fraction is 1/4.

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The fraction representing the model GI tract at 5 meters long to the real one at 9 meters is 5/9.

If the real gastrointestinal (GI) tract is 9 meters long and the model created is 5 meters in length, then to find the fraction that represents the model's length relative to the real GI tract, you would divide the length of the model by the length of the real GI tract. The calculation would be 5 meters (model) divided by 9 meters (real GI tract).

The fraction that represents the model's length to the real one is 5/9.

Explanation:

Let's begin by explaining that for radioactive geological dating (also called radioisotope dating) in which radioactive impurities were selectively incorporated when the fossil materials were formed, it is very useful to compare it with a naturally occurring radioisotope having a known half-life.

Now, taking into account that the fossils are millions and millions of years old, radioisotopes are needed that exceed this measure.

To understand it better:

The longer the half-life of a radioisotope, the greater its utility for estimating fossil ages or geological formations.

In this sense, uranium-238 (U238) has a half-life of 4,470 million years, therefore, it is among the most commonly used radioisotopes for fossil and geological dating.

Answer:

The capital of Prince Edward Island is Charlottetown.

Explanation:

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The capital of Prince Edward Island is Charlottetown.

The capital of Prince Edward Island, which is located in eastern North America, from Prince Edward Island to Virginia, is Charlottetown. This region spans from approximately latitude 46N to 37N, with the median latitude being around 42N, and the median longitude is near 70W. When learning about the geography of Canada, it's important to recognise Charlottetown as the capital as it plays a pivotal role in the province's governance, culture, and history.

Answer:

447.2 mph

Explanation:

The vertical distance from the plane to the station is 1 mile.

The horizontal distance from the plane to the station is x miles.

The distance between the plane and station is therefore:

d² = 1² + x²

Taking derivative with respect to time:

2d dd/dt = 0 + 2x dx/dt

d dd/dt = x dx/dt

We know that x = 2 miles and dx/dt = 500 mi/hr.  We need to find d when x=2.

d² = 1² + 2²

d² = 5

d = √5

Therefore:

√5 dd/dt = (2) (500)

dd/dt = 1000/√5

dd/dt = 200√5

dd/dt ≈ 447.2 mph

Answer:

24 time zones

Explanation:

Answer:

Answer is A.

Explanation:

Remember the equation for work:

W = F d cos θ

Math explanation: When θ = 0, cos θ = 1, so Fd is a maximum. For any other value of θ up to 90 degrees, cos θ < 1 so Fd will be smaller. For θ = 180, you're pushing away from the direction of displacement so you're actually doing negative work.

Intuitive explanation: you have the most success pushing an object when you apply the force directly against it compared to if the force was directed at an angle.

Answer:

when the angle between the force and displacement is 0°

Explanation:

Answer:

The Soviet Union had become the main focus of Germany's attacks. Britain and the U.S got Italy to surrender and then invade the beaches at Normandy, diverting the Germans attention to the west.

Answer:

the mass is the same

Explanation:

the mass of electrons is negligible so losing some to become positively charged causes no change in mass

Answer:

There is net transfer of energy and more over the balance between the number of charge particles occurs when there is some contact between any two surfaces or bodies. So, when an electrically neutral balloon is rubbed on a cloth and becomes positively charged it is just because of the number of charges that are transferred from a more charged body towards a body of having less charges on it. So, the masses of the positrons and the electrons are some how equal when compared.

Making, it more easy to understand that the two surfaces will have an equal number of positrons and electrons on both the bodies or object's surfaces.

Take the stone's position at ground level to be the origin, and the downward direction to be negative. Then its position in the air [tex]y[/tex] at time [tex]t[/tex] is given by

[tex]y=100\,\mathrm m-\dfrac g2t^2[/tex]

Let [tex]d[/tex] be the depth of the well. The stone hits the bottom of the well after 5.00 s, so that

[tex]-d=100\,\mathrm m-\dfrac g2(5.00\,\mathrm s)^2\implies d=\boxed{22.6\,\mathrm m}[/tex]

Answer:

14 m/s

Explanation:

The motion of the stone is a free fall motion, so an accelerated motion with constant acceleration g = 9.8 m/s^2 towards the ground. So, we can use the following SUVAT equation:

[tex]v^2 -u^2 = 2gh[/tex]

where

v is the final speed of the stone as it reaches the water

u = 0 is the initial speed

g = 9.8 m/s^2 is the acceleration

h = 10 m is the distance covered by the stone

Solving for v, we find

[tex]v=\sqrt{u^2+2gh}=\sqrt{0+2(9.8 m/s^2)(10 m)}=14 m/s[/tex]

Answer:

Similarities:

Differences:

Take note:

A scientific theory cannot be "upgraded" into a law, and a scientific law cannot be changed into a theory.

Scientific laws describe generalized patterns in nature, often with mathematical equations like Newton's second law of motion (F = ma), while scientific theories, such as the Theory of Evolution, offer complex explanations for a group of related phenomena. Laws illustrate what happens and theories explain why it happens. Scientific theories do not turn into scientific laws with new evidence.

Comparing Scientific Theory and Scientific Law

Scientific laws and scientific theories are foundational to understanding the natural world but serve different purposes within scientific inquiry. Scientific laws are concise descriptions of a generalized pattern in nature, often expressed through a mathematical equation. For instance, the law of conservation of energy that states energy is conserved in any process is a prime example of a scientific law. Another example is Newton's second law of motion (F = ma), describing the relation between force, mass, and acceleration.

On the other hand, a scientific theory provides an explanation for a broad range of phenomena, such as the Theory of Evolution or the Theory of Relativity. Theories are more complex, interpreting a group of related phenomena and are the result of a scientific method. While laws describe what happens, theories explain why it happens.

Laws vs. Theories: It's a misconception that theories transform into laws with more evidence. Instead, laws describe patterns we observe in data and are usually written as equations. Theories, which remain theories irrespective of new evidence, offer explanations for the patterns described by laws.

Explanation:

This problem is a good example of Vertical motion, where the main equation for this situation is:

[tex]y=y_{o}+V_{o}t-\frac{1}{2}gt^{2}[/tex] (1)

Where:

[tex]y[/tex] is the height of the stone at 6s (the value we want to find)

[tex]y_{o}=925ft[/tex] is the initial height of the stone

[tex]V_{o}=20ft/s[/tex] is the initial velocity of the stone

[tex]t=6s[/tex] is the time  at which we need to find the height

[tex]g=32ft/s^{2}[/tex] is the acceleration due to gravity

Having this clear, let's find [tex]y[/tex] from (1):

[tex]y=925ft+(20ft/s)(6s)-\frac{1}{2}(32ft/s^{2})(6s)^{2}[/tex] (2)

Finally:

[tex]y=469ft[/tex] This is the height of the stone at t=6s

Final answer:

The stone is 469 feet above the ground 6 seconds after it is thrown straight up from the edge of a roof.

Explanation:

To calculate how high the stone is 6 seconds later after being thrown straight up from the edge of a roof at a speed of 20 feet per second, we can use the kinematic equation for uniformly accelerated motion:

h = h0 + v0t + ½at2

where:
h is the final height,
h0 is the initial height (edge of the roof),
v0 is the initial velocity,
a is the acceleration due to gravity (which is negative here),
and t is the time.

Given values:
h0 = 925 feet (initial height),
v0 = 20 feet/second (initial velocity),
a = -32 feet/second2 (acceleration due to gravity),
t = 6 seconds (time).

Plugging in the given values, we get:

h = 925 feet + (20 feet/second × 6 seconds) + ½(-32 feet/second2)(6 seconds)2
  = 925 + 120 - 576
  = 1045 - 576
  = 469 feet

So, 6 seconds later, the stone is 469 feet above the ground.

Final answer:

The question requires calculating the new surface area of the face of an iron cube after it undergoes thermal expansion due to a temperature increase, using the concepts of thermal physics.

Explanation:

The question revolves around the thermal expansion of an iron cube when its temperature rises. The expansion can be understood through physics, specifically the concepts of thermal physics. To find the new surface area after the cube has been heated, we need to calculate the new length of an edge using the coefficient of linear thermal expansion for iron and the temperature change. Once the new edge length is determined, the new surface area of a face can be calculated by squaring the length of one edge. Since cubic expansion affects each dimension equally, the change in surface area can be determined by considering the square of the ratio of the new edge length to the original edge length.

Answer:

A decrease in length, or the use of a material with lower resistivity, or an increase in the cross-sectional area of the wire

Explanation:

The resistance of a wire is given by

[tex]R=\frac{\rho L}{A}[/tex]

where

[tex]\rho[/tex] is the resistivity of the material of the wire

L is the length of the wire

A is the cross-sectional area

We see that:

R is directly proportional to [tex]\rho[/tex] and L - therefore if we decrease one of these two, the resistance of the wire will decrease too

R is inversely proportional to A - therefore if the increase the cross-sectional area, the resistance of the wire will decrease

Answer:

A. shorter wires.

Explanation:

Nuclear fission consists of dividing a heavy nucleus into two or more lighter or smaller nuclei, by means of the bombardment with neutrons to make it unstable. In this process that takes place in the atomic nucleus, neutrons, gamma rays and large amounts of energy are emitted.  

Then, with this division a great release of energy occurs and the emission of two or three neutrons, other particles and gamma rays.  

This means fission is a process in which energy is released by  the separation of the components of the nucleous of the atom.

In other words:

Answer:

Covalent bond between two atoms with unequal electronegativities results in unequal sharing of electrons.

Explanation:

Unequal sharing of electrons between two atoms results in polar covalent bonds, characterized by partial charges on the atoms, due to different electronegativities.

When unequal sharing of electrons occurs between two atoms, it results in a polar covalent bond. This type of bond is characterized by the partial charges that develop on the atoms involved. Atoms with higher electronegativities attract the bonding electrons more strongly, leading to a partial negative charge on the more electronegative atom and a partial positive charge on the less electronegative one.

The unequal sharing of electrons and the resulting polar covalent bonds are crucial concepts because they influence molecular structure, physical properties, and reactivity.

For example, water (H₂O) has polar covalent bonds between hydrogen and oxygen, with the oxygen atom having a partial negative charge and the hydrogen atoms having partial positive charges. This polarity allows water to dissolve various substances, making it an excellent solvent.

Answer: A. The new idea was supported by experimental evidence

A P E X

Explanation:

The things that determine the amount of an object's gravitational potential energy are ...

-- mass of the object

-- gravitational acceleration in the place where the object is

-- height of the object above the ground or the floor

A). a slice of bread; No.  It's still a slice of bread even if it's on the ground.

B. A compressed spring; No.  It's still a compressed spring even if it's on the ground.

C. An apple on a tree; Yes !  It can't be an apple on a tree if it's on the ground.  

D. A stretched bow string; No.  It's still a stretched bowstring even if it's on the ground.

Gravitational potential energy is the energy stored in an object due to its height above the ground. An apple on a tree possesses gravitational potential energy because it has the potential to fall due to gravity.

The item in which energy is stored in the form of gravitational potential energy is an apple on a tree (option C). Gravitational potential energy is the energy stored in an object due to its position above the ground. The higher the position of the object, the higher its gravitational potential energy. In this case, an apple hanging on a tree has a potential of falling to the ground due to gravity, hence it has gravitational potential energy.

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Answer:

Sound waves. Anything that vibrates is producing sound; soundis simply a longitudinal wave passing through a medium via the vibration of particles in themedium. Consider a sound wavetraveling in air

There is 3 resistors all in a series.

The total resistance is 10 + 20 + 30 = 60 Ω

The current is the voltage divided by the resistance:

Current = 120 V / 60 Ω = 2 Amps.

Answer:   Astronomers theorize that the faster expansion rate is due to a mysterious, dark force that is pulling galaxies apart.

Explanation:

Astronomers theorize that the faster expansion rate is due to a mysterious, dark force that is pulling galaxies apart.

The event that the faster expansion rate is due to a  dark force that is pulling galaxies apart.

Universe is the whole cosmic system of matter and energy. The Earth, the Sun, the Moon, the planets, the stars along with the ,dust , gases, rocks forms the universe.

The big bang is the theory which explains that how the universe began. It says that the universe began with just a single point. It went on expanding and stretched to grow as large as possible. It is still now expanding.

The universe consist of fully dark matter, interstellar gases or dust. The big bang is increasing just because in universe there is abundant of hydrogen and helium.

The radiations come from the big bang. These rays are also called as cosmic wave. This universe is  still on it way of expanding more.

Thus, the faster expansion rate is due to a  dark force  pulling the galaxies apart.

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Answer:

C) a mixture of blue and red light

Explanation:

A grow light is an artificial source of light which is used to stimulate growth of plant by providing electric light appropriate for photosynthesis. These lights are used when there is no natural light available like the given situation in the question.

A mixture of Red and Blue light can be used to stimulate growth and regulate it. Red light stimulates growth while blue light regulates it. It is very cost effective solution.

Thus, option C is correct.

To maximize plant growth with a minimum of energy expenditure in a spaceship where natural sunlight is not available, a mixture of blue and red light should be used. Option C is the correct answer.

Blue light has a shorter wavelength and is essential for promoting vegetative growth, root development, and the overall health of plants. It plays a crucial role in regulating plant growth hormones and influencing various physiological processes. Option C is the correct answer.

Red light has a longer wavelength and is crucial for photosynthesis, the process by which plants convert light energy into chemical energy. Red light is absorbed by chlorophyll, the pigment responsible for capturing light energy, and is used in the synthesis of carbohydrates and other essential molecules needed for plant growth. By providing a mixture of blue and red light, the spaceship can simulate the necessary light spectrum required for optimal plant growth. This combination allows plants to efficiently utilize the light energy provided while minimizing energy expenditure.

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Answer:

Zero

Explanation:

The work done by a force on an object is given by:

[tex]W=Fd cos \theta[/tex]

where

F is the magnitude of the force

d is the displacement of the object

[tex]\theta[/tex] is the angle between the direction of the force and the displacement

In this problem, the force is the gravitational attraction between the Earth and the Sun, which points always towards the Sun. Therefore, the force is always perpendicular to the displacement of the Earth (which moves tangentially to its circular path). As a result, the angle in the formula is 90 degrees, which means that the cosine part is zero: so, the work done by the gravitational force is always zero, because the force is always perpendicular to the displacement.

Answer: i believe the correct answer is c. 0.87lbs