Which of these types of microscopy can resolve the smallest structures (assume the structure cannot emit light)? O Light microscopy O Light microscopy with oil immersion Electron microscopy No answer text provided

Explanation:

electrical energy into heat energy

electrical , thermal

Answer:

I think

C- It's a greenhouse gas

If we say that a galaxy has a lookback time of 1 billion years, we mean that its light traveled through space for 1 billion years to reach us.

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Answer:

 freezing melting sublimating  x y

 x and

Explanation:

To drop a table of states of matter the best headings must be

table name: matter state

    freezing melting sublimation x y

This order goes from the solid state to the gaseous state, which is obtained by introducing heat into the system

Answer: D on edge

X: Heat Is Absorbed

Y: Heat Is Released

Explanation:

sublimation and melting are both absorbing heat(aka getting warmer)as they change state while freezing and deposition are releasing heat(aka getting colder)as they change state

Answer:

E

Explanation:

All others conduct electricity and heat.

Answer:

E.Rubber

Explanation:

Rubber is the best insulator, they have them coated around electricity wires, while metals are good conductors.

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Answer:

we call a foreign born resident of us a citizen

Answer:

D By looking all the way to the cosmological horizon, we can see the actual conditions that prevailed all the way back to the first instant of the Big Bang.

Explanation:

Astrophysicists are able to determine the conditions that existed in the early universe, by using instruments such as telescopes to observe and study cosmic horizons. More ideas about the early universe can be found from the thermal light present in cosmic backgrounds.

Scientists study these details that provide an insight into the conditions that existed so many years ago. They have been able to determine that the Big Bang involved so many collisions from these observations.

To determine the initial temperature of the metal required to vaporize a given amount of water, we can use the equation for heat gained or lost during a phase change:

q = mΔH

where q is the heat gained or lost, m is the mass of the substance, and ΔH is the heat of fusion or vaporization.

ρ = ρ0[1 - β(T - T0)

T0 = (31.67 kJ) / (m(c) )

T0 = (31.67 kJ) / (m(c) )

T0 = (31.67 kJ) / (0.100 kg x 0.385 J/g°C )

T0 = 821.7 °C

Therefore, the initial temperature of the metal should be approximately 821.7 °C in order to vaporize 20.54 mL of water initially at 75.0 °C, assuming that the final vapor temperature is 100 °C.

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We know that the impulse if related to the momentum as:

and related to the average force and the time of the collision by:

Which means that:

a)

In this case the force is 1250 N, the time is 0.16 s, the initial velocity is 0 and the mass is 102.5 kg, then we have:

Therefore the velocity is 1.951219512 m/s.

b)

In this case the force is 1250 N, the time is 0.16 s, the initial velocity is 0 and the mass is 4.64 kg, then we have:

Therefore the velocity is 43.10344828 m/s.

Some planetary phenomena defied explanation by Aristotle's universe model. Retrograde motion was the most obvious of these. Each planet appears to move in reverse at times when it is in retrograde motion, slowing down briefly before picking up speed again. As they move through the sky, planets also get brighter or dimmer. Neither phenomenon could be adequately explained by Aristotle's model.

What is Aristotle's model ?

The celestial and the terrestrial were Aristotle's two divisions of the cosmos. The Earth, Moon, and the region between them, known as the sub lunar region, were all considered to be parts of the terrestrial realm. The terrestrial world was characterized by change and flaws.

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Answer:

See below

Explanation:

Parallel circuits have multiple paths of current ...'parallel' paths

The maximum horizontal force that can be applied to the lower block without the upper block slipping is approximately 10.29 N.

To determine the maximum horizontal force that can be applied to the lower block without the upper block slipping, we need to consider the force of static friction between the two blocks.

The maximum force of static friction (F_static_max) can be calculated using the equation:

F_static_max = μ * N

where μ is the coefficient of static friction and N is the normal force between the blocks.

In this case, the normal force (N) is equal to the weight of the upper block, which can be calculated as:

N = m * g

where m is the mass of the upper block and g is the acceleration due to gravity.

Given that the two blocks are identical and each has a mass of 3 kg, the normal force is:

N = (3 kg) * (9.8 m/s^2) = 29.4 N

Now we can calculate the maximum force of static friction:

F_static_max = (0.35) * (29.4 N) ≈ 10.29 N

Therefore, the maximum horizontal force that can be applied to the lower block without the upper block slipping is approximately 10.29 N.

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Evidence of a chemical change includes

change in color

Answer:

No!

Explanation:

The correct answer is x = 9.

The guitar string undergoes 30,720 oscillations each minute, which is not among the given options. However, it is closest to option B) 30,700.

We're given that the frequency of the guitar string's vibration is 512 Hz, which means it undergoes 512 oscillations per second. We need to find out how many oscillations it undergoes each minute.
Step 1: Convert the frequency from oscillations per second (Hz) to oscillations per minute.
To do this, we'll multiply the frequency (in Hz) by the number of seconds in a minute.

Step 2: Calculate the number of oscillations per minute.
Frequency (Hz) = 512 oscillations/second
Number of seconds in a minute = 60 seconds
Oscillations per minute = (Frequency in Hz) * (Number of seconds in a minute)
Oscillations per minute = (512 oscillations/second) * (60 seconds)

Step 3: Calculate the result.
Oscillations per minute = 30720 oscillations
It is important to note that the actual answer is 30,720, but if you must choose from the given options, B) 30,700 is the closest approximation.

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Answer: Is it not this: The strength of the gravitational force between two objects depends on two factors, mass and distance. the force of gravity the masses exert on each other. If one of the masses is doubled, the force of gravity between the objects is doubled. increases, the force of gravity decreases.

While building a house, it's crucial to take energy transmission into account because homes lose a lot of thermal energy. Radiation, conduction, and convection are three ways they can lose energy.

Buildings must consider heat transfer while designing the fabric of the structure as well as the passive and active systems required to provide the desired thermal conditions with the least amount of resource use.

The three most crucial variables are temperature, moisture content, and density. Thickness, air velocity, pressing, and ageing time are further considerations. The correlation between the key variables and thermal conductivity is shown.

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Titan is able to keep an atmosphere because it has a much stronger gravitational pull than Mercury, despite being only slightly larger.

Additionally, Titan's atmosphere is primarily composed of nitrogen, which has a relatively low escape velocity compared to other gases. This means that even though Titan's gravity is weaker than some other planets, it is still strong enough to hold onto the nitrogen molecules and keep them from escaping into space. The presence of methane and other hydrocarbons on the surface of Titan also helps to maintain its atmosphere through a process known as "methane rain," in which these molecules evaporate and then condense back onto the surface, cycling them back into the atmosphere.

Titan, the largest moon of Saturn, is able to keep an atmosphere despite its relatively small size because of a combination of factors, including its low surface temperature and the composition of its atmosphere.

Firstly, Titan's surface temperature is extremely cold, averaging around -180 degrees Celsius (-292 degrees Fahrenheit). This low temperature means that the gases in Titan's atmosphere move much more slowly than they would at higher temperatures, which reduces the rate at which they escape into space. This effect is known as "thermal escape," and is a major factor in determining whether a planet or moon can maintain an atmosphere.

Secondly, Titan's atmosphere is composed primarily of nitrogen, which is a relatively heavy gas compared to hydrogen and helium, the two lightest elements in the universe. This means that nitrogen is less likely to be lost to space due to thermal escape, because it has a lower average velocity than lighter gases.

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If a marble is launched at a speed of 9 m/s at an angle of 25° above the horizontal. If the experiment is done on a level floor, then The distance that  the  marble will  land if friction is neglected is: C. 6.33 m.

Given data:

Speed = 9m/s

Angle = 25°

Now let find the  distance the  marble will  land if friction is neglected

Range = v²  sin(25 × 2)/g

Range = (9 m/s)² × sin 50 / g

Range =(81 m/s²  × 0.766044) / 9.8 m/s²

Range = 62.049564 m/s² / 9.8 m/s²

Range = 6.3315m

Range = 6.332 m (Approximately)

Therefore we can conclude that the correct option is C.

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Hi there!

When the acceleration of a block in SHM is 0 m/s², the NET FORCE must equal 0 N.

0 m/s² acceleration is obtained when the spring is at its equilibrium point, meaning that:

∑F = -kx (x = displacement from equilibrium point in meters)

If the block is at the equilibrium point, displacement = 0m, so:

∑F = -k(0) = 0 N

With Newton's Second Law, ∑F = ma. If the net force is 0 N, then there is no acceleration experienced by the block.

Thus, the other quantity that must be 0 is the block's NET FORCE.

Answer:

B. The refridgerant

Explanation:

this allows the refrigerant to absorb or release heat

Answer:

A simple pulley is a wheel with a rope that allows you to pull one end and have it lift whatever is on the other end. A modern, common example of this is a crane, often used in construction.

Explanation:

Mugabe gained power by using political strategies, forming alliances, and exploiting his status as a liberation hero within ZANU-PF.

Robert Mugabe, the former president of Zimbabwe, was able to build power through a combination of political strategies and alliances. One key factor was his involvement in the liberation struggle against white minority rule in Rhodesia (now Zimbabwe).

Mugabe emerged as a prominent figure within the Zimbabwe African National Union (ZANU) party, which later merged with the Zimbabwe African People's Union (ZAPU) to form the Zimbabwe African National Union - Patriotic Front (ZANU-PF). Mugabe's role as a liberation hero and his ability to mobilize support among the majority black population of Zimbabwe gave him a strong power base.

Within ZANU-PF, Mugabe strategically positioned himself and gained influence by forming alliances and outmaneuvering rivals. He rose to become the party's leader and played a key role in negotiating the Lancaster House Agreement in 1979, which paved the way for Zimbabwe's independence in 1980. Mugabe became the country's first prime minister and later transformed the position into an executive presidency, consolidating his authority.

Mugabe maintained power through various means, including controlling key institutions such as the military, intelligence agencies, and the ruling party. He also utilized patronage networks, distributing resources and positions to loyal supporters within the party and government. Mugabe's policies, such as the controversial land reform program, further solidified his power base by appealing to nationalist sentiments and redistributing land from white farmers to black Zimbabweans.

However, Mugabe's consolidation of power was also marked by authoritarianism, human rights abuses, and a declining economy. His grip on power faced challenges over the years, including opposition movements, internal party factions, and economic crises. Ultimately, his rule came to an end in 2017 when he was ousted from power following a military intervention.

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Temperature measures the average kinetic energy of the particles in an object or substance that is in Option D, as it is a measure of the average kinetic energy of the particles in a substance or object.

When particles in a substance move, they possess kinetic energy; the faster they move, the more kinetic energy they possess, and the higher the temperature of the substance as it measures the relative heat of an object compared to its environment.

As a result, temperature measures the average kinetic energy of the particles in an Option D object or substance.

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The question is incomplete, complete question is below

What does temperature measure?(1 point)

Responses

a)potential energy stored in the chemical bonds of an object or substance

b)kinetic energy of objects or substances

c)relative heat of an object or substance compared to its environment

d) average kinetic energy of the particles in an object or substance

Total internal reflection can occur when light travels from a medium with a higher refractive index to a medium with a lower refractive index. Hence options A and D are correct.

Total internal reflection can occur when light travels from a medium with a higher refractive index to a medium with a lower refractive index. Since diamond has a higher refractive index than air, total internal reflection takes place in option A. Depending on the refractive indices of the specific glass and air involved option D can also be correct.

In the case of option, C From air to water:

Water has a higher refractive index than air, but total internal reflection does not occur in this case because the critical angle for the air-water interface is larger than 90 degrees. Light entering from air to water will be partially refracted and partially reflected, but not totally internally reflected.

In the case of option, B From the diamond to water:

Total internal reflection does not occur in this case because water has a higher refractive index than diamond, so the light would be refracted rather than internally reflected.

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Answer:

The answer is A: Total internal reflection may take place when light enters from air to diamond.

Explanation:

Total internal reflection occurs when light travels from a medium with a lower refractive index to a medium with a higher refractive index and the angle of incidence is greater than the critical angle.

This causes the light ray to be completely reflected back into the first medium, rather than entering the second medium.

In this case:

A) Air has a lower refractive index than diamond, so light entering diamond from air at a high angle of incidence can undergo total internal reflection.

B) Diamond has a higher refractive index than water, so light entering water from diamond will pass through, not reflect.

C) Air has a lower refractive index than water, but the difference is not large enough to cause total internal reflection except at very high angles.

D) Air has a lower refractive index than glass, but generally not enough to produce total internal reflection except at very high angles.

So option A is the only case listed where total internal reflection is likely upon light entering the second medium (diamond), due to the large difference in refractive index between air and diamond.

The minimum applied force that will keep the box at rest is 55 N.

The term frictional force refers to the force that opposes the motion of a body. We have the following information'

Given that;

μ = F/R

R = mgcosθ = 26.8 kg × 9.8 ms-2 × cos13 =255.9 N

F = μR

F =  0.215 × 255.9 N

F = 55 N

The minimum applied force that will keep the box at rest is 55 N.

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Hi there!

To solve, we can use a summation of torques.

For the see-saw to balance, the sum of torques must equal 0, so:

∑τ = 0

Recall that:

τ = rFsinθ

r = distance from pivot (meters)

F = force (N)

In this case, the forces are the weight of the children. Also, we can leave the distance in centimeters for this type of problem, but others do require a conversion to meters.

Multiply each mass by 10 (g ≈ 10 m/s²) to get the weight:

Στ = 270(400) - x(300) = 0

270(400) = 300x

Solve for 'x', the distance in cm away from the fulcrum:

108000/300 = 360 cm

The instance of contacting Overhead Electric Lines when a worker does not detect that an electricity distribution wire has collapsed on his automobile and is electrocuted while opening the car door after just a heavy storm.

Thunderstorms are characterised as having hail of least an inch in diameter and winds of 58 miles per hour or more, and the following debate can be summarised as follows:

Avoiding any job that could put you in contact with or close to overhead electrical lines is the most effective way to prevent any kind of collision.

After a severe storm, a worker opens the car door without realising that an electricity distribution wire has fallen on it and is killed as a result.

The worker touches the metal frame, which is in contact with simply an overhead electricity wire, by opening the door.

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