If a hailstone falling from certain height melts completely by just reaching the ground. then which of the following could be best reason

a. Heated by friction
b. Potential energy absorbed by latent heat c. PE absorbed by KE
d. Impossible to say​

Answer:

Look below.

Explanation:

If additives are having negative effects on health and the environment, it would be wise to not use detergents containing these additives. These additives could threaten living things such as humans and animals.

There is concern that extra additives in detergents can have negative health and environmental impacts, then it would be very unwise to use detergents containing these additives

It can be defined as the origination of the contaminant substance that poisonous or harmful to our natural environment.

There are several types of pollution that exist in our nature depending on the state and composition of the contaminant, for example, water pollution can exist due to the eutrophication process.

It would be quite unwise to use surfactants that include these additional ingredients since there is fear that they might have a harmful influence on your well-being and the environment.

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Nuclear fuels, Coal, and Petroleum are not derived from the sun.

Nuclear fuels, such as uranium and plutonium, are not derived from the sun. They are formed through natural processes in the Earth's crust and are extracted for use in nuclear power plants. Coal is a fossil fuel that is formed from the remains of plants that lived millions of years ago.

It is extracted from underground mines or obtained through other methods like mountaintop removal. Petroleum, also known as crude oil, is a fossil fuel formed from the remains of ancient marine organisms. It is found in underground reservoirs and extracted through drilling.

The other sources of energy listed in the question are derived from the sun in one way or another. Biomass energy is produced through the conversion of organic matter, such as plants and animal waste, which ultimately derive their energy from the sun through photosynthesis.

Wind energy is generated by the movement of air masses, which is driven by temperature differences caused by the uneven heating of the Earth's surface by the sun. Ocean thermal energy is derived from the temperature difference between warm surface water and cold deep water, which is influenced by solar radiation.

Geothermal energy is generated by harnessing the heat from the Earth's interior, which is a result of the sun's heat and radioactive decay. Hydroelectricity is produced by the gravitational force of water, which is part of the water cycle driven by the sun's energy.

Wave energy is obtained from the motion of ocean waves, which are created by wind patterns influenced by solar radiation. Tidal energy is derived from the gravitational forces between the Earth, the moon, and the sun, although it is not directly from solar radiation.

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Without knowing all the external forces and assuming e = 1, we cannot accurately determine the final velocities for an elastic collision.

To show that p1 + p2 = p'1 + p'2 and E = E', we can use the conservation equations for momentum and energy.

For momentum conservation:

p1 + p2 = p'1 + p'2

(m1v1 + m2v2) = (m1v'1 + m2v'2)

For energy conservation:

E = E'

(1/2)m1v1^2 + (1/2)m2v2^2 = (1/2)m1v'1^2 + (1/2)m2v'2^2

In an elastic collision, e = 1, which means that the kinetic energy is conserved. However, in this case, we cannot assume that e = 1. Therefore, the collision is not necessarily elastic and the final velocities may not be accurate.

Additionally, we also need to consider any external forces that may be acting on the system, as they can also affect the final velocities. Without knowing all the external forces and assuming e = 1, we cannot accurately determine the final velocities for an elastic collision.

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The model represents a compound, therefore the correct answer is option A.

A chemical compound is a combination of two or more either similar or dissimilar chemical elements.

For example, H₂O is a chemical compound made up of two oxygen atoms and a single hydrogen atom.

A single carbon atom is covalently joined to two oxygen atoms to form the chemical molecule known as carbon dioxide or CO2.

Animals exhale it, and plants use it in the process of photosynthesis. Under normal conditions of pressure and temperature, carbon dioxide, or CO2, is a gas.

Thus, the model represents a compound, therefore the correct answer is option A.

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The force of gravity affects the upward motion of the ball causing a decrease in the velocity and acceleration of the ball as it moves upwards.

The motion of a ball thrown across a room is affected by force of gravity which causes the ball to fall to the floor.

The velocity of the ball decreases as the ball moves upwards and eventually becomes zero at maximum height, which starts to increase again as the ball begins fall down.

The acceleration of the ball is directed downwards during the motion.

Thus, we can conclude that the force of gravity affects the upward motion of the ball causing a decrease in the velocity and acceleration of the ball as it moves upwards.

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Answer:

In general there are three sub-segments of "alternative" energy investment: solar energy, wind energy and hybrid electric vehicles

Explanation:

Its organism are one cell I think

The substance that is the best transmitter of solar energy is glass.

Solar energy is an effective and renewable energy source that is harnessed in a variety of ways. In order to utilize solar energy in the most efficient way possible, it is necessary to determine which substance is the best transmitter of this energy. Among all substances, glass is the best transmitter of solar energy. Glass is transparent, which means that it allows sunlight to pass through it. In fact, it transmits about 90% of the sunlight that falls on it. Glass also traps the remaining heat, which is why it is an ideal material for greenhouses and solar panels. A greenhouse is a structure that is built with glass walls and roofs in order to grow plants. The glass walls and roofs trap the sunlight, which heats up the inside of the greenhouse. This allows plants to grow in a controlled environment that is not affected by changes in the weather. A solar panel is a device that converts sunlight into electrical energy. The solar panel is made up of photovoltaic cells, which are made of silicon and other materials that absorb sunlight. When the sunlight is absorbed by the photovoltaic cells, it creates an electric current that can be used to power a variety of devices.

In conclusion, glass is the best transmitter of solar energy. It transmits about 90% of the sunlight that falls on it and traps the remaining heat, making it an ideal material for greenhouses and solar panels. By using glass, we can harness the power of the sun in a variety of ways that are efficient, effective, and environmentally friendly.

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In the Bohr's model of the hydrogen atom, we are given the speed of the electron as 2.20 × 10^6 m/s and the radius of the circular orbit as 0.530 × 10^−10 m. We need to calculate (a) the force acting on the electron and (b) the centripetal acceleration of the electron.

In the Bohr model, the force acting on the electron is the centripetal force, which is provided by the electrostatic attraction between the electron and the nucleus. The centripetal force can be calculated using the formula:

(a) F = (m\(v^{2}\)) / r, where F is the force, m is the mass of the electron, v is the speed of the electron, and r is the radius of the circular orbit.

To calculate the force, we need to know the mass of the electron, which is approximately 9.11 × \(10^{-31}\) kg. By substituting the given values into the formula, we can find the force acting on the electron.

(b) The centripetal acceleration of the electron can be calculated using the formula: a = \(v^{2}\) / r, where a is the centripetal acceleration.

By substituting the given values into the formula, we can find the centripetal acceleration of the electron.

Both the force acting on the electron and the centripetal acceleration will be expressed in appropriate units according to the formulae.

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At 5.80 metres, a pole vaulter just clears the bar before tumbling to the ground. 3.70 103 j worth of potential energy is lost by the vaulter during the fall. The weight of the pole-vaulter is 3.70 × 10³ N (Newtons).

To determine the vaulter's weight, we can use the equation for potential energy:

ΔPE = mgh

Where ΔPE is the change in potential energy, m is the mass of the vaulter, g is the acceleration due to gravity, and h is the height.

Given:

ΔPE = -3.70 × 10³ J (negative value indicates a decrease in potential energy)

h = 5.80 m

Using the equation, we can rearrange it to solve for weight:

mgh = ΔPE

mg = ΔPE / h

Substituting the given values:

mg = (-3.70 × 10³ J) / 5.80 m

Solving for mg, we find:

mg = -6.38 × 10² kg·m/s²

Therefore, the vaulter's weight is approximately -6.38 × 10² N. The negative sign indicates that the weight acts in the opposite direction of the vaulter's motion, i.e., downward.

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When a car slows down uniformly from a speed of 23.0 m/s to rest in 7.60 s,

it is required to find out the distance the car travels in that time.

What is Uniformly Accelerated Motion?

Uniformly Accelerated Motion or Constant Acceleration is the motion of an object moving in a straight line with constant acceleration. The velocity of the object changes equally in equal intervals of time. This means that the object travels an equal distance in an equal amount of time. It is a type of motion that is very common in nature.

How far did it travel in that time?

To find the distance travelled by the car, we need to apply the following formula:

$$d=\frac{1}{2}(v_i+v_f)t$$Where,vi = initial velocity = 23.0 m/sv f = final velocity = 0 m/st = time taken to come to rest = 7.60 s

Substitute the values of vi, vf, and t into the formula.$$d=\frac{1}{2}(23.0+0)×7.60$$Simplify.$$d=87.7m$$

Therefore, the car travels 87.7 m in that time.

Uniformly Accelerated Motion : A straight line motion with a constant acceleration and zero difference is what constitutes the uniformly accelerated motion. As a result, the velocity of an object moving in this direction changes constantly.

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Rotation curves of galaxies imply the existence of dark matter because they show unexpected and anomalous behavior in the distribution of mass within galaxies.

The rotation curve of a galaxy describes the rotational velocity of stars or gas clouds at various distances from the galactic center. According to Newtonian physics, the rotational velocity should decrease with increasing distance from the center, as the gravitational pull weakens. However, observations have revealed that the rotational velocities remain constant or even increase with distance from the center, indicating the presence of additional mass beyond what is accounted for by visible matter. This discrepancy between the predicted and observed rotational velocities suggests the existence of unseen matter, commonly referred to as dark matter.

Dark matter does not emit or interact with light, making it invisible and difficult to detect directly. However, its gravitational effects can be observed through its influence on the motion of visible matter. The presence of dark matter provides the additional gravitational pull required to explain the observed high rotational velocities of stars and gas clouds in galaxies. Various astrophysical and cosmological studies, such as gravitational lensing and the cosmic microwave background radiation, further support the existence of dark matter.

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The mass of the second sphere is 7.1 kg. This is calculated using conservation of momentum and given conditions.

To find the mass of the second sphere, we must use the conservation of momentum. The initial momentum of the system is equal to the final momentum of the system.

The initial momentum is only from the first sphere, as the second is at rest. After the collision, the composite system moves with one-third the original speed.

By setting up the momentum equation (m1*v1 = (m1 + m2)*(1/3)v1), we can solve for the mass of the second sphere (m2). Plugging in the given values, we find that the mass of the second sphere is 7.1 kg.

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Answer:

the final velocity of the skater after throwing the snowball is 3.17 m/s.

Explanation:

Given;

mass of the ice skater, m₁ = 72 kg

initial velocity of the ice skater, u₁ = 3.1 m/s

mass of the snowball, m₂ = 0.21 kg

initial speed of the snowball, u₂ = 28.0 m/s

Let the final velocity of the skater after throwing the snowball = v

Apply the principle of conservation of linear momentum to determine v;

m₁u₁ + m₂u₂ = v(m₁ + m₂)

72 x 3.1   +  0.21 x 28  = v(72 + 0.21)

229.08 = v(72.21)

v = 229.08 / 72.21

v = 3.17 m/s

Therefore, the final velocity of the skater after throwing the snowball is 3.17 m/s.

The amplitude is 0.45 m,

The period is 1.37 s,

The wavelength is 4.13 m, and

The speed is 3 m/s.

A wave is a disturbance that travels through a medium, transferring energy without transferring matter. Waves can be characterized by their amplitude, frequency, wavelength, and speed.

There are many types of waves, including mechanical waves (such as sound waves and water waves) and electromagnetic waves (such as light and radio waves). Waves are important in many areas of science and technology, from communication to medicine to engineering.

To solve this problem, we can use the following formulas:

Amplitude (A) = distance from the trough to the crest / 2 = 0.9 / 2 = 0.45 m

Period (T) = time for one wave to pass = 1.37 s

Wavelength (λ) = distance from crest to crest (or trough to trough) = 4.13 m

Speed (v) = λ / T = 4.13 / 1.37 = 3 m/s

Therefore, the amplitude is 0.45 m, the period is 1.37 s, the wavelength is 4.13 m, and the speed is 3 m/s.

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The magnitude of the force exerted by your friend on you is the same as the force exerted by you on your friend. Both forces are equal in magnitude but opposite in direction, resulting in a balanced tug of war.

The magnitude of the force exerted by your friend on you is the same. In a tug of war, the forces acting on each person are equal in magnitude but opposite in direction. This is known as Newton's third law of motion, which states that for every action, there is an equal and opposite reaction.

When you and your friend pull on the rope, your friend exerts a force on you in one direction, while you exert an equal and opposite force on your friend. These forces cancel each other out, resulting in a state of equilibrium where neither of you seems to be winning.

Even though you may move a little one way or the other, the magnitude of the force exerted by your friend on you remains the same. This is because the force depends on the strength and effort applied by each person, not on their size or weight.

So, in this scenario, the magnitude of the force exerted by your friend on you is the same as the force exerted by you on your friend. Both forces are equal in magnitude but opposite in direction, resulting in a balanced tug of war.

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Answer:water

Explanation:

Water may be a nutrient that makes up 60% of our body weight. it's important in many functions, it's part of every cell in every tissue in the body.

Water carries other nutrients to all or any parts of the body, it carries waste out of the body and it helps to manage body temperature. When you run or play sports your body heats up pretty quickly.

Your body starts to sweat as a way to get rid of the heat. When the sweat evaporates on your skin your body and blood get cool. it's very important to replace the fluid that is lost by sweating so as not to become dehydrated.

If you get dehydrated the body cannot cool itself anymore and your performance will drop. Without enough water, whether you're exercising or sitting all day, you're at risk for dehydration which can be fatal

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Answer:

1. A microphone dropped 5 meters above the surface of Jupiter

2. Someone jumping out of a plane at 8000 meters

Explanation:

*Note: As clarified by the person who asked the question, the "S" in problem 1 is meant to be a 5.

The potential energy of an object is given by \(PE=mgh\), where \(m\) is the mass of the object, \(g\) is acceleration due to gravity, and \(h\) is the height of the object.

In problem 1, it is given that the height is the same for both objects and implied that the mass is the same for both objects. However, acceleration due to gravity is about 2.54 times greater on Jupiter than on Earth. Therefore, a microphone dropped 5 meters above the surface of Jupiter will have more potential energy than the same microphone  dropped 5 meters above the surface of Earth.

Similarly, in problem 2, mass and acceleration due to gravity are maintained. The only difference is the height the person is jumping out of. Since potential energy is directly proportional to height, the larger the height, the more potential energy. Thus, someone jumping out of a plane at 8000 meters will have more potential energy than someone of the same mass jumping out of a plane on the same planet at 5000 meters.

Ranking the forms of light in order of increasing wavelength:
1. Gamma rays, 2. X-rays, 3. Ultraviolet, 4. Visible light, 5. Infrared, 6. Radio waves.

In this order, the wavelengths increase from shorter to longer as we move from gamma rays to radio waves. The electromagnetic spectrum is a continuum of electromagnetic waves arranged in order of increasing wavelength. Gamma rays have the shortest wavelength and the highest energy, followed by X-rays, ultraviolet, visible light, infrared, and radio waves with progressively longer wavelengths. This ranking represents the arrangement of these forms of light from shortest to longest wavelengths.

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Answer:

-10 m/s²

Explanation:

a = Δv / Δt

a = (20 m/s − 50 m/s) / 3 s

a = -10 m/s²

Answer 10 m/s²

Explanation:

a = Δv / Δt

a = (20 m/s − 50 m/s) / 3 s

a = -10 m/s²

Explanation:

Answer:

Should be Venus

Explanation:

Answer: The answer is Venus!

Explanation: Venus has the longest day of any planet in our solar system. It completes one rotation every 243 Earth days. Its day lasts longer than its orbit.

The magnitude of the electric force between two charged particles is given by Coulomb's Law:

Where q_1 and q_2 are the charges of the particles, r is the distance between the charged particles and k is the Coulomb's Constant:

Since the magnitude of both charges is the same, the equation becomes:

The force and the distance between the particles are given, the value of k is known and the charge q is unknown. Isolate q from the equation:

Replace the values of r=24.04*10^-2m, F=87.96N as well as the value of k to find the magnitude of the charges:

Therefore, the magnitude of the charges in microCoulombs is: 23.78μC.

The statement "the three main weapons organic to the standard fire team and squad are the M4 Assault Rifle, M203 40mm Grenade Launcher, and the M240 7.62mm Machine Gun" is true.

Biologicаl аnd toxin weаpons аre either microorgаnisms like virus, bаcteriа or fungi, or toxic substаnces produced by living orgаnisms thаt аre produced аnd releаsed deliberаtely to cаuse diseаse аnd deаth in humаns, аnimаls or plаnts. Munitions, devices аnd other equipment specificаlly designed to weаponise toxic chemicаls аlso fаll under the definition of chemicаl weаpons.

These three weapons are indeed the main ones organic to a standard fire team and squad, providing a versatile and effective combination of firepower for various combat situations.

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Answer:

New Hampshire

New York.

Virginia.

Minnesota.

Connecticut.

Vermont

New Jersey.

Massachusetts.

Answer:

Minnesota

Explanation:

Answer:

1.32 (3sf)

Explanation:

total distance the sound wave travel= 225 x 2= 450m
450 ÷ 340= 1.32s

Answer:

hope this helps

Explanation:

Of the three phases of matter (gas, liquid, and solid), sound waves travel the slowest through gases, faster through liquids, and fastest through solids

so your answer would be B.

If the Hubble constant is smaller than previously thought, it would imply that the universe is older than currently estimated.

The Hubble constant is a measure of the rate at which the universe is expanding. It is currently estimated to be around 70 km/s/Mpc, meaning that for every megaparsec of distance, the universe is expanding at a rate of 70 kilometers per second. If the Hubble constant were found to be smaller than this value, it would mean that the universe is expanding more slowly than previously thought.

This, in turn, would imply that the universe is older than currently estimated, since it would have taken longer for the expansion to reach its current state. Conversely, if the Hubble constant were found to be larger than currently estimated, it would mean that the universe is younger than currently estimated.

The Hubble constant is an important parameter for understanding the evolution and structure of the universe, and any new observations that help refine its value can provide valuable insights into the nature of the cosmos.

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