What is the relative humidity if the dry-bulb temperature is 18°C and the wet-bulb temperature is 11°C?

Answers

Answer 1

Answer:

The amount of moisture air can hold is dependent on its temperature and pressure. The warmer the air the greater the quantity of water vapour it can contain. The air temperature is measured with a normal thermometer this is the Dry-Bulb reading. The actual amount of moisture known as the mixing ratio is measured in grams of water per kilogram of dry air. When air at a certain temperature is saturated it cannot hold any more moisture. The relative humidity of the air is the ratio of the actual amount of moisture in the air to the fully saturated amount.

We can use evaporation to measure the amount of moisture in the air. A wet cloth is placed over the bulb of a thermometer and then air is blown over the cloth causing the water to evaporate. Since evaporation takes up heat, the thermometer will cool to a lower temperature than a thermometer with a dry bulb at the same time and place. The depression in Wet-Bulb temperature allows the humidity to be calculated. If the air is fully saturated (100% relative humidity) the water cannot evaporate, so both the wet and dry bulb temperatures are the same. If the dry and wet bulb temperatures are set to the same value the calculator will show the saturation mixing ratio the amount of water in saturated air at that temperature.

If partly saturated air is cooled without changing its pressure or amount of water vapour, a point is reached when it becomes saturated. The moisture will be given up as dew or ice crystals. This temperature is the Dew Point. This is why condensation will form on a bottle of cold beer, as the air in the vicinity of the bottle is cooled below its dew point. Meteorological reports usually quote the temperature and dew point as well as the station pressure. Moisture content and relative humidity can be calculated from these figures.

The Psychrometer is the name of a device containing both a wet and dry bulb thermometer. This can be a fixed device for meteorology or a handheld sling psychrometer that is often used in air conditioning applications.

Explanation:


Related Questions

19. The particles in an object move very quickly and are spread apart. Then they move slower and get slower and get closer together but do not form regular and organized patterns. What change of state occured? How do you know?

Answers

Answer:

The transformation went from a gas to a solid which is a Deposition

Explanation:

Deposition is the phase transition in which gas transforms into solid without passing through the liquid phase. Deposition is a thermodynamic process. The reverse of deposition is sublimation and hence sometimes deposition is called desublimation.

The change of state that occurred was that the object went from gas to solid in a process of Deposition.

The properties of gas and solid:

Particles in gas move very quickly which leads to them being spread apart Particles in solids are quite slow and so are close together

Based on the properties of the object before and after the change, we can infer that the object went from gas directly to solid. This process is called a deposition.

In conclusion, a deposition occurred with gas changing directly to solid.

Find out more at https://brainly.com/question/24651908.

PLS HELP, WILL MARK BRAINLIEST!!!
A bowling ball has a mass of 5kg and weight of 49 Newtons on Earth. Astronauts take it on a journey to the moon, Phobos (a moon of Mars) and Jupiter and measure the bowling ball’s weight. Put the locations in order from least weight to most weight for the bowling ball.
(1 Point)
Earth
Jupiter
The Moon
Phobos

Answers

Answer:the moon, earth, phobos,and jupiter

Explanation:i hope im right

What was the first iphone

Answers

Answer:=Phone 2G

Explanation:

Answer:

model=A1203

Explanation:

it was the first iPhone invented by apple sync

(ii)
Calculate the amount of energy required to melt 15 kg of ice at 0 °C.
Specific latent heat of fusion of ice = 3.4 x 10J/kg.

Answers

Energy = m x L = 25 x 340 000 = 8.5 M J
(I think there is a power of 5 missing on your number)

what happens to the wave length and frequency of a wave as it crosses a different medium and speeds​

Answers

Answer:  SEE EXPLANATION!

Explanation:

When waves travel from one medium to another the frequency never changes. As waves travel into the denser medium, they slow down and wavelength decreases. Part of the wave travels faster for longer causing the wave to turn. The wave is slower but the wavelength is shorter meaning frequency remains the same.

I hope this helps you!

Help plz I’m Cunfused !!

Answers

Explanation:

look up the coordinates or if they provide you with a map use that

Answer:

find each point in and draw a straight line until they touch and whatever is there is the country

Explain how the Sun's gravitational force affects Earth even though the Sun is 93 million miles away.

Answers

Answer:

Perfect distance away makes it suitable for life

Explanation:

The Sun's gravitational pull helps to control tides on earth and also to keep the earth in a curvilinear motion.

What is gravity?

Gravity, or gravitation, is a natural phenomenon in which all entities with mass or energy are drawn to one another, including planets, stars, galaxies, and even light.

The gravitational pull of the sun continuously pulls the earth towards it, although because of the fast movement of the earth we never reach towards the sun instead we revolve around it.

Despite the fact that the sun's gravitational pull is neutralised by the movement of the earth in a curve, there is still some gravitational pull that exists which helps to control the tides on earth.

Thus, the Sun's gravitational pull helps to control tides on earth and also to keep the earth in a curvilinear motion.

Learn more about Gravity:

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1. A baseball is thrown horizontally at 45 m/s. The ball slows down at a rate of 5 m/s?


a. How long is the ball in the air before coming to rest?


b. How far did the ball travel in that time?


2. A car starts from rest and accelerates at 9.54 m/s? for 6.5 seconds.


a. How much distance was covered by the car?


b. What was the final velocity of the car?


3. An arrow leaves a bow with a speed of 42 m/s. Its velocity is reduced to 34 m/s by the time it

hits its target


a. What was the acceleration of the arrow?


b. How much distance did the arrow travel over if it were in the air for 2.4 seconds?


c. What was the average velocity of the arrow?


4. A ball starts from rest and rolls down a hill with a constant acceleration of 3.0 m/s?.


a. What is its speed at the end of 4.0 s?


b. How far did the ball move in that 4.0 s?

Answers

Answer:

Explanation:

a )

initial velocity u = 45 m/s

acceleration a = - 5 m/s²

final velocity v = 0

v = u - at

0 = 45 - 5 t

t = 9 s

b )

s = ut - 1/2 at²

= 45 x 9 - .5 x5x 9²

405 - 202.5

202.5 m

2 )

a )

s = ut + 1/2 a t²

u = 0

s = 1/2 at²

= .5 x 9.54 x 6.5²

= 201.5 m

b )

v = u + at

= 0 + 9.54 x 6.5

= 62.01 m / s

3

a )

acceleration = (v - u) / t

= (34 - 42) / 2.4

= - 3.33 m /s²

b )

v² = u² - 2 a s

34² = 42² - 2 x 3.33² s

s = 27.41 m

c )

Average velocity

Total displacement / time

= 27.41 / 2.4

= 11.42 m /s

4 )

a )

v = u + at

v = 0 + 3 x 4

= 12 m /s

b )

s = ut + 1/2 a t²

= o + .5 x 3 x 4²

= 24 m

Make a claim about the time interval between lunar phases.
I will mark as BRAINLIEST ✨
just pls help ASAP
due by 4:00pm
plss

Answers

Answer:

The Lunar month is the time period for the moon to complete ONE revolution around Earth. SIDEREAL MONTH: 27.3 days SYNODIC MONTH: 29.5 days

According to Rahul any two bricks tied together would fall faster than a single
one under the action of gravity by neglecting air resistance. Do you agree with
Rahul? Give a reason to support your answer.

Answers

Answer:

Rahul is wrong.

Explanation:

From Newton's universal law of gravitation, we know that the force of attraction between two falling body masses is directly proportional to product of masses of two bodies and has an inverse proportional relation with the square of the distance between the masses.

If the 2 masses are M1 & M2, while distance between them is d, this can be written as;

F ∝ M1•M2

And F ∝ 1/d²

We also know that the acceleration due to gravity is given as;

g = GM/r²

Where;

M is the mass of earth

r is the radius of earth

From the above 3 formulas, we can deduce that the value of the acceleration due to gravity(g) is independent of the 2 masses of the falling body as it depends on only the mass of the earth and radius of the earth.

This means that the acceleration due to gravity will be the same whether the bricks are doubled or whether it remains single.

Thus, they will fall with same velocity in each case. So Rahul is wrong.

Can you please help me it’s due at 11:59 please

Answers

Answer:

1 is summer, 2 is most likely winter,3 is most likely summer, and 4 is fall

Explanation:

The modern periodic table is organized by:
atomic number
atomic mass
chemical name
chemical symbol

Answers

Atomic number ................................

Please help hurry. It’s time.

Answers

Answer: a

Explanation: Hope it helps

Answer:

A

Explanation:

I think its a because A would be heavier making it go down faster than B. its like when you drop a father compared to a ball, the feather is lighter so it will go down slower than the ball because it has more mass

what is centripetal motion

Answers

Answer:

abhi ham logo KO madam ne Padaya nahi hai

A movement of an object along the circumference of a circle or rotation along a circular path.

A student stands in a school hallway. A wall separates a classroom from
the student. The student in the hallway cannot see inside the classroom
but hears noises from within the classroom. Which of these best explains
why the student hears the noises but cannot see into the classroom?

Answers

Answer: sound waves are transmitted through the wall and visible light waves are reflected by the wall.

You push a desk with 245 N, but the desk doesn't move due to its friction with the ground. What is the magnitude of the friction force felt by the desk?

Answers

If the desk doesn't move, then it's not accelerating.

If it's not accelerating, then the net force on it is zero.

If the net force on it is zero, then any forces on it are balanced.

If there are only two forces on it and they're balanced, then they have equal strengths, and they point in opposite directions.

So the friction on the desk must be equal to your 245N .

What is the formula for impulse and momentum?

Answers

Answer: p = mv

Explanation:  momentum(p) is equal to mass(m) and velocity(v).

1. A car is traveling at 36 m/s hits a tree and comes to rest in 0.05 seconds.
a. What is the acceleration of the car?
b. Airbags deploy in a car if the acceleration of a car exceeds -600 m/s^2 Will the airbags deploy?

Answers

Answer: a. -720m/s^2

b. Yes, airbags will deploy

Explanation:

The formula for acceleration is:

= (Final velocity - Initial velocity)/Time

Final velocity = 0m/s

Initial velocity = 36m/s

Time taken = 0.05s

= (Final velocity - Initial velocity)/Time

= (0 - 36)/0.05

= -36/0.05

= -720m/s^2.

Since it's negative, it shows that there was a deceleration.

2. Yes the airbag will deploy since the acceleration gotten is more than -600 m/s^2.

An inclined plane of length 12m is used to pull a load of 3000N to height of 3m by applying an effort of 1000N. Calculate its MA, VR and efficiency. Also, find the work done in the machine

Answers

Answer:

MA  = 4

VR = 3

e = 0.75 or 75%

work = 12000 [J]

Explanation:

The mechanical advantage in an inclined plane is defined as the relationship between the length of the inclined plane and the height of the plane with respect to the ground.

MA = L/h

MA = 12/3 = 4

Now the real advantage can be calculated as the relationship between the weight of the body and the force being applied.

VR = W/F

VR = 3000/1000

VR = 3

Efficiency can be calculated as the relationship between the real mechanical advantage over the ideal mechanical advantage.

e = VR/MA

e = 3/4

e = 0.75 or 75%

The work is defined as the product of the force by the distance, therefore we have:

work = F*d

work = 1000*12

work = 12000 [J]

a motorcycle stunt driver rides his motorcycle off a small ledge that is 8.4m high his initial velocity as he rides off the ledge is 25m/s in the horizontal direction how long does it take before he lands on the ground. answer= 1.3 s

Answers

Answer:

1.3s

Explanation:

HURRY PLEASE!!
The particles of solids are packed together tightly, so sound waves travel faster through solids than through liquids or gases. How do light waves differ from sound waves?

A. Light waves require a medium and travel fastest through liquids

B. Light waves require a medium, but travel fastest through a vacuum

C. Light waves do not require a medium, but travel fastest through solids

D.
Light waves do not require a medium and travel fastest when in a vacuum

Answers

Answer:

Hope it help you

Stayhomestaysafe

Plz mark my answer brainliest✍️✍️

Explanation:

Sound travels fastest through solids. This is because molecules in a solid medium are much closer together than those in a liquid or gas, allowing sound waves to travel more quickly through it. In fact, sound waves travel over 17 times faster through steel than through air.

Option b

REAL NAME - SHRESTH DUBEY

Answer : D). Light waves do not require a medium and travel fastest when in a vacuum.

Explain: Light is a transverse, electromagnetic wave that can be seen by the typical human. The wave nature of light was first illustrated through experiments on diffraction and interference. Like all electromagnetic waves, light can travel through a vacuum.

A 0.660 kg ball is dropped from rest from the top of a building and falls for 5.65 seconds. How tall was the building ?

Answers

Answer:

The height of the building is approximately 156.58 m

Explanation:

The mass of the ball dropped from rest from the building top = 0.660 kg

The time in which the ball falls, t = 5.65 seconds

The height, h, of the building is given from the following equation of motion;

h = u·t + ¹/₂·g·t²

Where;

u = The initial velocity of the ball = 0 m/s

g = The acceleration due to gravity = 9.81 m/s²

Plugging in the values, we have;

h = 0 × 5.65 + ¹/₂ × 9.81 × 5.65² ≈ 156.58 m

The height of the building, h ≈ 156.58 m.

in a meter of 3 how many beats are in a measure also this is for music

Answers

Answer:

3 i think

Explanation:

hope this helps also Hiiii

3 is the correct answer

An object dropped from rest and falls a distance of 80 m.
What is the objects displacement

Answers

Answer:

Δx = -80m

Explanation:

The object's displacement is -80m because it landed 80m below where it started.

Which universal force acts only on the protons and neutrons in a nucleus? *
5 points
electric
gravitational
magnetic
strong nuclear
Option 5

Answers

Answer:

a strong nuclear force is a powerful force of attraction that acts only on the neutrons and protons in nucleus

so the answer is: STRONG NUCLEAR

Karen has 50 cats, Gary has 14 fewer cats than Karen and Billy has 8 times more than Gary. How many cats does Billy have?

Answers

Answer:

The answer is:

14 x 8= 1.120

Answer:

288 cats

Explanation:

K = 50

G = 50 - 14 = 36

B = 36 x 8 = 288

Billy has 288 cats.

Please let me know if I'm incorrect!

Intensity during a cardiovascular endurance workout means..

A. How often the activity is performed

B. How long the activity is performed

C. How hard the activity is performed

D. Where the activity is performed​

Answers

C

Explanation:

It means how hard the activity is performed.To improve cardio respiratory endurance, the frequency of the workout sessions should be: 5 to 7 sessions per week.

Does the mean molecular speed change as much as the temperature as the water heats up?

Answers

For each degree of temperature change, the mean molecular speed increases by about 1 m/s. At 100 °C, the mean molecular speed is about 17% faster than at 0 °C.

A 30 kg mass sits on a level surface with a coefficient of friction of .2. What net force is necessary to accelerate it
at 3 m/s2?

Answers

Answer:

Explanation:

Idk

In space, rockets move by shooting air backwards. What moves faster the air or the ship?

Answers

Answer:

Its being pushed.

Explanation:

There is no air but its being pushed by the flames coming from the rocket.

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