Use appropriate software for calculations. a room contains 65 kg of dry air and 0.43 kg of water vapor at 25°c and 90 kpa total pressure. the relative humidity of air in the room is:_______

Answer:

and the power to which the number should be raised:

1.50E2 = 1500

4.167E4 = 41,760

4.167E-4 = .0004176

Mass of the earth = 5.98 * 10^24 kg = 5.98E24 kg

Some examples of scientific notation

Answer:

hey Army

I'm B.T.S Army

안녕하세요

The correct answer is b. Increasing the radius of the rice would decrease the coefficient of friction needed for the ride, as a larger surface area would increase the area of contact between the rider and the ride, thus reducing the force of friction.

Gravity is a natural phenomenon by which all objects with mass are brought towards each other. It is most commonly observed as the attraction between objects with mass, such as the Earth and the Moon. This force of attraction is known as the force of gravity. Gravity also affects light and other particles, such as protons and neutrons. Gravity holds us to the ground and helps keep the planets in their orbits. It is the reason why objects fall to the ground and why we can’t easily fly off into space. Gravity is one of the fundamental forces of nature and is essential to understanding the universe.


Increasing the speed of the ride would increase the coefficient of friction needed, as it would increase the force of friction. Increasing the acceleration due to gravity would have no effect on the coefficient of friction needed for the ride.

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Answer:

Force applied

Explanation:

An object will remain at its state of rest unless a non zero for act on it

To find the transistor parameter and the value of VBE that produces IC=4.5mA, we can use the - characteristics.

The - characteristics of a transistor represent the relationship between the collector current (IC) and the base-emitter voltage (VBE) for different values of collector-emitter voltage (VCE). By analyzing this graph, we can determine the transistor parameter and the value of VBE that produces a specific IC.

First, we need to locate the IC=4.5mA on the vertical axis of the - characteristics graph. Then, we trace a horizontal line from this point until it intersects with the curve of the transistor parameter we are interested in.

Next, we draw a vertical line from the intersection point until it intersects with the VBE axis. This will give us the value of VBE that produces the desired IC.

By following these steps, we can accurately determine the transistor parameter and the value of VBE that satisfies the given condition.

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Pretty long so read if you will:

I'm pretty late to this but oh well. Well to start why are people homophobic in the first place? You might not understand as well but that is because me and you are growing up at a time and place where people are encouraged to be themselves and we're embracing people that are different than what is considered normal. Gay marriage was legalized literally in the US in 2015, 5 years ago. I come from Malaysia, one of the few countries where it's illegal to be gay and can cause a death penalty from what I've seen. Obviously I grew up in a place where gay and whatnot were a joke and is wrong. But we moved and I came to the US and my beliefs changes, it also helped that I was literally only 11 so I was more easier to change than adults. Majority of the world honestly, are not as open to the lgbtq+ community as a person in America might think. The belief that it's only a women and men probably stems from the fact that it's how u make babies. And if we know anything, society doesn't like things that are different. To stop people being homophobic you have to stop people from spreading the belief that it's wrong to be gay or bi. This is going to be hard and people really overestimate the world when it comes to change. Peoples belief won't be changed so quick just, change doesn't happen quick. It's going to be a long time and maybe even never, look at racism. We all exist together for so long but there's still racism though much less compared to back then. As long as people stop teaching that next generation, us, that being lgbtq+ is bad, it will decrease but it will take a long time. And as much as I agree we need it to be now, it won't and trying to force something will only cause more backlash. Just try to inform the people around you and understand change does not happen fast, it's slow, especially if it you want it to be permanent.

Answer:

its J. Waning Crescent hope it helps

After watching the Ted Talk, there were still a few questions that I had about supermassive black holes. Firstly, I wanted to know more about the event horizon and what it exactly entails. Although the speaker briefly touched upon this subject, I would have appreciated a more in-depth explanation. Additionally, I would have liked to know more about the role of supermassive black holes in the universe.

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A ball when is projected horizontally from the top of a vertical cliff 40m high with a velocity of 20m/s, the vertical component of the velocity on getting to the ground​ is 28.3 m/s.

When any object moves, it can be said to be in motion under gravity because gravity has an impact on the object’s vertical motion. Gravity is also called as the force that pulls things downward. In actuality, gravity pulls objects toward the Earth’s center.

The particle’s initial velocity is 0 during free fall. Consequently, this v=gt is the equation of motion.

An object launched into the air may also experience a shift in upward velocity due to gravity, which causes it to slow down and return to Earth’s surface. The Moon is kept in orbit by the force of Earth’s gravity, which also causes the Moon to rotate constantly.

Initial horizontal velocity = 20\(ms^{-1}\)

Initial vertical velocity = 0

Vy= Uy + gt

Vy= gt {Uy= 0}

Vy= 10 × 2.83= 28.3m/s

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Answer:

1 m/s so number 2 is the right one

Explanation:

so when it is at rest it still has some of the left over energy so it would be at 1 m/s

Answer:

I have no idea.

Explanation:

I just wanted to tell you I absolutely read this wrong.

Answer:

6.0cm

Explanation:

Given

focal length = 15.0cm

object distance = 10.0cm

Required

Image distance v

Using the formula

1/f = 1/u + 1/v

1/15 = 1/10+1/v

1/v = 1/15 + 1/10

1/v = 2+3/30

1/v = 5/30

v = 30/5

v = 6.0cm

Hence the image distance is 6.0cm

Answer:

6.0 (2 sig figs)

Explanation:

Is it General Physics? I had it and passed the Final Exam with an A in the beginning of July!

True

Changes in the Earth's orbit around the sun and changes in the tilt and wobble of the Earth's axis can lead to cooling or warming of the Earth's climate because they change the amount of energy our planet receives from the sun

The amplitude of oscillations of the automobile can be calculated using the formula: A = (m * g * h) / (k + m * w^2)

where:

m = 1000 kg (mass of the automobile including passengers)

g = 9.8 m/s^2 (acceleration due to gravity)

h = 5 cm = 0.05 m (amplitude of the sinusoidal bumps)

k = effective spring constant of the suspension system

w = 2 * pi * f

= 2 * pi * v / lambda

= 2 * pi * 20 / 20

= 2 * pi (frequency of the bumps, v is the speed of the car, lambda is the wavelength)

We don't have the value for k,

so we can assume it to be a constant value for all cars.

Therefore, the amplitude of oscillations can be calculated as:

A = (1000 kg * 9.8 m/s^2 * 0.05 m) / (k + 1000 kg * (2 * pi)^2)

This value will give us the maximum vertical displacement of the car from its mean position.

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The answer is true. Yes the galvanized wire rope is approximately 10% higher in strength than bright wire rope.

True. Galvanized wire rope is known for its increased strength compared to bright wire rope, with approximately a 10% higher breaking strength. This is due to the galvanizing process that adds a protective zinc coating to the wire, increasing its durability and resistance to corrosion. The zinc coating can also increase the strength of the wire rope by up to 10%, compared to bright wire rope, which is untreated and has no coating. Therefore, galvanized wire rope is generally stronger than bright wire rope and can be used in more demanding applications.

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This statement is partially true, but it is important to understand the context and implications. Electric vehicles do not produce tailpipe emissions, which means that they can reduce local air pollution in urban areas.

However, the generation of electricity to power these vehicles can still produce emissions at the point of generation, such as power plants.

The extent of this shift depends on the source of electricity generation in a given region. In areas with a high percentage of renewable energy sources, such as wind and solar, the emissions associated with electric vehicle use would be negligible. In areas that rely heavily on coal-fired power plants, the emissions associated with electric vehicle use could be significant.

It is important to note that even in areas with high emissions from electricity generation, electric vehicles still have benefits over traditional gasoline vehicles. This is because electric vehicles are more energy-efficient and produce fewer emissions overall, even when accounting for emissions from electricity generation.

In summary, while electric vehicles do shift the source of emissions from tailpipes to power plants, the overall reduction in emissions is still significant, especially in areas with a high percentage of renewable energy sources.

Therefore, the statement that electric vehicles only shift the emission of air pollutants from dispersed sources to point sources is not entirely accurate and does not fully capture the benefits of electric vehicles.

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Answer:

D. Electrons mover from one to another

Explanation:

Static electricity occurs when electrons are transferred from one object to another.

The correct answer is 131 kJ.  To calculate the kinetic energy of the truck, we first need to convert its mass from slugs to pounds.

1 slug = 32.174 pounds

So, 950 slugs = 30,565 pounds

Next, we need to convert the speed from miles per hour to feet per second:

55 miles per hour = 80.67 feet per second

Now we can use the formula for kinetic energy:

KE = 0.5 x m x v^2

where KE is kinetic energy, m is mass, and v is velocity.

Plugging in the values:

KE = 0.5 x 30,565 x (80.67)^2

KE ≈ 98,000 ft·lb

Therefore, the kinetic energy of the truck is 98,000 ft·lb or approximately 131 kJ.

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Note: If the question asked for work done by the car, then it will be equal to the kinetic energy of the body.

Answer:

salmonella and from eating raw food

Explanation:

Answer:

Food Poisoning is bad very bad. You can get the following sicknesses:  cramping, nausea, vomiting, or diarrhea. It usually comes from food that has a lot of Germs in it, Bacteria, Viruses, etc. But it is not usually something that can kill you, just go to your doctor and they might give you medicine to stop the Poisoning.

Answer:

Según la actitud del hablante las oraciones se clasifican en enunciativas, interrogativas, etc. ... adverbios o expresiones que complementan a toda la oración (COr): ojalá, quizá.

Explanation:

Answer: the coefficient would be either 4 or 5

Explanation:

Initial speed of the coin (u)= 0 (As the coin is released from rest)

Acceleration due to gravity (a) = g = 9.81 m/s²

Time of fall (t) = 1.5 s

From equation of motion we have:

\( \boxed{ \bf{v = u + at}}\)

By substituting values in the equation, we get:

\( \longrightarrow \) v = 0 + 9.81 × 1.5

\( \longrightarrow \) v = 14.715 m/s

\( \therefore \) Speed of the coin as it hits the ground/Final speed of the coin = 14.715 m/s

The speed of the coin as it hits the ground is 14.715 m/s.

We can solve the problem above using the equation of acceleration under gravity.

⇒ Equation:

v = u+gt................... Equation 1

⇒ Where:

From the question,

⇒ Given:

Substitute these values into equation 1

Note the speed has a negative sign because it acts in the same direction as the acceleration due to gravity

Hence, the speed of the coin as it hits the ground is 14.715 m/s.

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The temperature difference for a waterfall of height 21 m is 0.05 °C. The correct option is B.

The temperature difference for a waterfall can be calculated using the principle of conservation of energy. When water falls from a height, its potential energy is converted into kinetic energy and then into thermal energy due to the friction and turbulence created by the waterfall.

The potential energy of an object is given by the equation: PE = mgh, where m is the mass, g is the acceleration due to gravity (approximately 9.8 m/s^2), and h is the height.

In this case, we can assume that the mass of the water remains constant throughout the fall. The change in potential energy is then equal to the change in thermal energy.

ΔPE = Δthermal energy

mgh = mcΔT

Here, c is the specific heat capacity of water (4200 J/(kg °C)) and ΔT is the change in temperature.

We can rearrange the equation to solve for ΔT:

ΔT = gh/c

Given:

h = 21 m

g = 9.8 m/s^2

c = 4200 J/(kg °C)

Plugging in the values:

ΔT = (9.8 m/s^2) * (21 m) / (4200 J/(kg °C))

ΔT = 0.05 °C

Therefore, the temperature difference for a waterfall of height 21 m is 0.05 °C. The answer is option B.

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Answer:toward the ceiling

Explanation:

if you use the right hand rule it will point to the ceiling

To calculate the energy of a wave of green light with a wavelength of 505 nm, we can use the equation\(E = hc/λ\\\), where E represents energy, h is Planck's constant, c is the speed of light, and λ is the wavelength.

According to the equation \(E = hc/λ\\\), the energy of a wave is inversely proportional to its wavelength. As the wavelength decreases, the energy of the wave increases.

To calculate the energy of the green light wave with a wavelength of 505 nm, we need to convert the wavelength to meters. Using the conversion factor \(1 nm = 1 × 10^(-9)\)m, we can express the wavelength as \(505 nm × (1 × 10^(-9) m/1 nm) = 505 × 10^(-9) m.\)

Next, we substitute the values into the equation E = hc/λ. Planck's constant, h, is approximately 6.626 × 10^(-34) J·s, and the speed of light, c, is approximately 3.00 × 10^8 m/s.

\(E = (6.626 × 10^(-34) J·s × 3.00 × 10^8 m/s) / (505 × 10^(-9) m) = 3.941 × 10^(-19) J.\)

Therefore, the wave of green light with a wavelength of 505 nm has an energy of approximately \(3.941 × 10^(-19) joules.\)

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There is always a potential that an abrasive power tool's wheel wasn't sound and may burst or disintegrate, thus neither the operator nor anyone else should ever stand in front of the wheel as it accelerates to full operational speed. So, C is the best choice.

Before mounting, all abrasive wheels must undergo a thorough inspection and ring test to make sure there are no fractures or other flaws. The spindle's grinding wheels must easily fit on it without being pressed in.

The spindle nut should only be tightened enough to secure the wheel. The following are a few recommendations for using abrasive wheels: The spindle end, nut, and flange projection guards on abrasive wheel tools must be covered. Keep the wheel in the right alignment. Never use more force than the fastenings can handle.

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First, let's calculate the electric force, using the formula below:

Now, let's use the second law of Newton to find the acceleration:

Frictional force is reduced in smooth surfaces but is large in rough surfaces.

Force is defined as an agent which causes a change in the motion or state of an object.

Forces are of two types:

Contact forces include frictional force.

Frictional forces refers to the force which acts between two surfaces in contact by opposing the relative motion of one over the other

Frictional force depends on the nature of surfaces in contact where rough surfaces produce greater frictional force than smooth surfaces.

Therefore, frictional force is reduced in smooth surfaces but is large in rough surfaces.

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The speed of the projectile just before it strikes the ground is  29.4 m/s.

Since the projectile is launched horizontally, it will only experience acceleration due to gravity acting vertically downwards. The horizontal velocity of the projectile will remain constant throughout its flight.

We can use the following kinematic equation to find the speed of the projectile just before it strikes the ground:

\(v^2 = u^2 + 2as\)

where:

v is the final velocity (which we want to find)

u is the initial velocity in the horizontal direction, which is 30 m/s

a is the acceleration due to gravity, which is approximately 9.81 m/s²

s is the vertical displacement of the projectile, which is equal to the initial height of the building, 30 m.

Since the projectile is launched horizontally, the initial vertical velocity is zero.

Substituting these values into the equation, we get:

v² = (30 m/s)² + 2(-9.81 m/s²)(30 m)

v² = 900 m/s² - 1765.4 m^2/s²

v² = -865.4 m²/s² (note that the result is negative because the velocity is in the opposite direction to the acceleration)

Taking the square root of both sides of the equation (ignoring the negative solution since speed is always positive), we get:

v = 29.4 m/s (rounded to one decimal place)

Therefore, the speed of the projectile just before it strikes the ground is approximately 29.4 m/s.

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