Describe what it means to view something from a frame of reference. Give an example to illustrate your explanation. (4 points)

Given

m = 1g

Lvap = 2260 j/g

p = 1.01 x 10^5 Pa = 1 Atm

T = 100 C = 373 K

Vsteam = 1671 cm3

Vwater = 1 cm3

ΔV = (Vsteam - Vwater) = 1671 - 1 = 1670 cm3

Procedure

a) External work done by the system

Q = mL

W = pΔV

External word done by the system is 169 J

b) increase in internal energy

ΔU = Q - W

Increase in the internal energy is 2091 J

Answer:

Energy stored in an object due to its position is Potential Energy. · Energy that a moving object has due to its motion is Kinetic Energy.

Explanation:

Answer:

To summarize, potential energy is the energy that is stored in an object due to its position relative to some zero position.

Holding a bow and arrow before shooting, The amount of energy stored before you race on track, And a roller coaster going to it's highest point staying there waiting to come down.

If a liquid doesn't absorb visible light, the liquid would appear dark or opaque to us.

The absorption of light, especially visible light, makes an object dark or opaque. To some wavelengths of light, some materials are opaque, but some are transparent to others. Glass, for instance, is opaque to ultraviolet light, but it is transparent to visible light.

Since the liquid does not absorb visible light, to human eyes the liquid would appear dark or opaque. This is because human eyes are only sensitive to visible light. If the dark/opaque liquid actually reflects other lights, we wouldn't know (without the help of technology) since we don't see them.

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Answer:

Explanation:

A plane mirror is the kind you look into when you look into a "regular" mirror. The image you see is right-side-up. These images are virtual. Real images are always upside down and are made by mirrors that are "parabolic" in shape. Virtual images are always right-side-up.

Answer:

wave w is a sound wave

wave x and y are light waves

Answer:

D

Explanation:

Answer:

It can cause death by asphyxiation in minutes or a gas/air embolism. This can cause the blood vessels to rupture and cause hemorrhage

Explanation:

Inhaling helium from a pure helium pressurized tank can cause something called an 'air embolism'. This is eventually a bubble that was trapped in a blood vessel, and therefor blocks it. The blood vessels can then rupture and hemorrhage.

Short answer: The results of breathing in 100% pure helium is asphyxiation, which eventually causes death.

I hope this helps! (If this was a question which had multiple choice answers, feel free to post them in the comment section and I would be more than happy to give you a direct answer to the test.)

The fact that the blood type matches that of the defendant is no proof that the defendant is guilty as charged.

There are about four blood types that people can have, these blood types are; A, B, AB and O. Everybody must posses one of these blood types. A person's blood type is determined through laboratory tests.

The  prosecuting attorney was wrong in concluding that the defendant is guilty as charged only based on the blood type evidence. different people could have the same blood type. Only DNA analysis can conclusively prove that the defendant is actually guilty as charged.

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We will determine the work as follows:

So:

So, the work done by the force of gravity is of 78.4 J.

Answer:

Explanation:

One of the biggest reasons why we haven't been able to harness power from fusion is that its energy requirements are unbelievably, terribly high. In order for fusion to occur, you need a temperature of at least 100,000,000 degrees Celsius. That's slightly more than 6 times the temperature of the Sun's core.

The ranking of the following by their power output, from highest to lowest is as follows:

In physics, power may be defined as the amount of energy that is considerably transferred or converted per unit of time. In the International System of Units, the unit of power is the watt.

Early locomotives and railcars with internal combustion engines ran on kerosene and gasoline. While internal combustion engines can operate well across a limited range of power, low-power gasoline engines may be coupled to mechanical gears. Therefore, Boeing 777 jet engine operating at full power (75 Megawatts) represents the highest power output.

Therefore, the ranking of the following by their power output, from highest to lowest is well mentioned above.

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The statement "True or False, the optimal temperature for computer systems is between 10 and 32 degrees Fahrenheit" is False.

Computer systems generate heat while operating, and this heat can harm their internal components if it is not dissipated efficiently. As a result, keeping computer systems at the correct temperature is critical to their continued performance and longevity. The optimal temperature range for computer systems is generally between 60 and 75 degrees Fahrenheit, according to most manufacturers. Some manufacturers suggest that a temperature range of 68 to 71 degrees Fahrenheit is optimal, but this may vary based on the specific type of system or component being used.

While keeping the temperature within the optimal range can help ensure that the system continues to operate correctly, it is also essential to maintain adequate airflow and cooling within the computer case to dissipate the heat generated by the system's components.

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By being wary of these factors and following the recommended guidelines, you can ensure the safe and effective use of hemoconcentrators in medical procedures.

When using hemoconcentrators, it's essential to be cautious and consider a few factors to ensure their safe and effective use. Some things to be wary of with hemoconcentrators include:
1. Compatibility: Make sure the hemoconcentrator is compatible with your specific application and equipment to avoid any malfunctions or complications during the procedure.
2. Clotting risks: Hemoconcentrators can sometimes lead to increased blood clotting risks. Ensure appropriate anticoagulation measures are in place during the procedure to minimize this risk.
3. Flow rate: Be mindful of the blood flow rate through the hemoconcentrator. Exceeding the recommended flow rate could lead to hemolysis or other complications.
4. Sterility: Maintain a sterile environment and follow proper handling procedures to prevent contamination, which could potentially lead to infection.
5. Monitoring: Closely monitor the patient's vital signs, blood pressure, and fluid balance during the procedure to promptly identify and address any adverse reactions or complications.

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Answer:

The angiosperms dominate Earth's surface and vegetation in more environments, particularly terrestrial habitats, than any other group of plants. As a result, angiosperms are the most important ultimate source of food for birds and mammals, including humans.

Explanation:

plz mark brainlest

Gases also expand when they are heated and contract when they are cooled. The molecules of a hot gas move faster than the molecules of a cold gas, so they hit each other harder and bounce harder off the sides of a container. This makes the molecules move farther apart and push the sides of a container outward.

The speed an object needs to move away from the gravitational pull of the earth is called escape velocity.

Escape velocity is defined as the minimum speed an object must reach to escape the gravitational pull of a celestial body. For example, the escape velocity from Earth is about 11.2 km/s (or 40,320 km/h or 25,022 mph).

This means that an object needs to reach a speed of at least 11.2 km/s to break free from the Earth's gravitational field and continue traveling into space. If an object does not reach escape velocity, it will either enter into orbit around the celestial body or will be pulled back down to the surface.

The concept of escape velocity is important in space exploration and is used to determine the trajectories of spacecraft and rockets.

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A car traveling at a steady speed of 30m/s along a motorway overtakes a coach traveling in the same direction at 25m/s.

A. 1 minute after overtaking, the car will be 300 meters ahead of the coach.

B. 30 minutes after overtaking, the car will be 9000 meters ahead of the coach.

The car is traveling 5 m/s faster than the coach. This means that every second, the car gains 5 meters on the coach. After 1 minute, or 60 seconds, the car will have gained 300 meters on the coach. After 30 minutes, or 1800 seconds, the car will have gained 9000 meters on the coach.

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Answer:  The speed of wave is 2m/s.

Explanation:

The speed of wave equals to the distance/time. So when we divide 4m and 2s, we get that the speed of wave is 2m/s

Answer:

55 km

pls give brainliest hope it help

Explanation:

A body will maintain a constant negative electrostatic charge if the body continues to gain or accumulate excess electrons. Electrostatic charge refers to the electric charge that an object carries due to an imbalance of positive and negative charges.

When a body gains an excess of electrons, it becomes negatively charged. This can occur through processes like friction, where electrons are transferred from one object to another.

To maintain a constant negative electrostatic charge, the body should ensure that it continuously receives an inflow of electrons or prevents the loss of electrons. This can be achieved by being in contact with negatively charged materials or surfaces, or by being shielded from sources that can neutralize the charge.

It is important to note that maintaining a constant negative electrostatic charge may not be feasible in all situations, as environmental factors and interactions with other objects can influence the charge on a body.

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The change in the kinetic energy of the calcium ion's is 6.4 x 10⁻¹⁶ J.

The change in the kinetic energy of the ion's which accelerated through the given potential difference is calculated as follows;

ΔK.E = qV

where;

Substitute the given parameters in the above equation and solve for change in kinetic energy.

ΔK.E = (2e)V

ΔK.E = (2 x 1.6 x 10⁻¹⁹) x (2.0 x 10³)

ΔK.E = 6.4 x 10⁻¹⁶ J

Thus, the change in the kinetic energy of the calcium ion's is 6.4 x 10⁻¹⁶ J.

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The reflection of light off the ice-air interface in a frozen block of ice causes the light to undergo a phase shift of 180 degrees, resulting in an inverted image compared to the incident light.

An explanation for this is that when light waves travel from one medium to another with a different refractive index, such as from ice to air, they undergo a phase shift due to the change in speed of the wave.

The phase shift depends on the angle of incidence and the refractive indices of the two media.

In the case of reflection off the ice-air interface, the phase shift is 180 degrees for light waves with a certain angle of incidence.

In summary, the reflection of light off the ice-air interface in a frozen block of ice causes the light to undergo a phase shift of 180 degrees, resulting in an inverted image compared to the incident light.

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Answer:

76 seconds

Explanation:

Using the formula t=vf-vo/a, where t=time, vf= final velocity, v0= initial velocity, and a= acceleration, we can solve for your problem.

Plug in known variables...

t=200-10/a

we can solve for a by using the formula F=ma where f=force, m= mass, and a=acceleration and rearranging it to solve for a.

a=F/m

Plug in known variables...

a=250N/100kg

a=2.5m/s^2

Plug in our newly found acceleration of 2.5 m/s^2 into our first equation and solve....

t=190/2.5

t=76 seconds

The deceleration experienced by the 1075 N sky diver as he opened his parachute is 13.39 m/s²

Force = mass × acceleration

We know that deceleration is the acceleration of stopping objects. Thus,

Force (F) = mass (m) × deceleration (a)

Thus, we can obtain the deceleration of the sky diver as follow:

Force = mass (m) × deceleration (a)

1469 = 109.69 × a

Divide both sides by 109.69

a = 1469 / 109.69

a = 13.39 m/s²

Thus, the deceleration is 13.39 m/s²

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the approximate \(x^{1}\) and \(x^{2}\) values that you expect in an air column resonance experiment performed at 240C with a tuning fork frequency, f\(x^{2}\) =540Hz =  = 3*0.16 = 0.48 m

first resonating length \(x^1\) = v / 4*f

where v = speed of sound at 24oC

we know that

v /prop to /sqrt{T}

speed of sound at 0 C = 330 m/s

\(v^1\) / \(v^{2}\) = sqrt (T1 / T2)

330 / \(v^{2}\)  = sqrt (273 / 273+24)

v = 344.12 mm/s

\(x^{1}\) = 344.12 / 4*540

\(x^{1}\) = 0.16 m

\(x^{2}\) = 3*\(x^{1}\)

\(x^{2}\) = 3*0.16 = 0.48 m

A sound wave in an organ line can be perceived as the superposition of waves reflecting back and forward between the two closures, with horrendous impedance at hubs and useful obstruction at antinodes.

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Answer:

2 atomic of phosphorus and 5 of oxygen

Explanation:

The numbers attached to the elements (ie. subscript) show the amount of atoms present for each element.

Distance = 10 miles

Displacement = zero

The coach must be fired and disciplined.

Answer:

57600 m and hour

Explanation:

In a battery, when positive charges move to the positive terminal, the potential energy of positive charges decreases

This is because positive charges move from a region of high potential energy to a region of low potential energy. As the positive charges move to the positive terminal, they lose potential energy and gain kinetic energy. This is because the positive terminal has a lower potential energy than the negative terminal.

The potential energy of the positive charges decreases as they move towards the positive terminal because they are moving towards a region of lower potential energy. This is similar to how a ball rolls down a hill, losing potential energy and gaining kinetic energy as it moves towards the bottom of the hill.

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Answer:

3000 cm

Explanation: