Homework Answers
The growing degree day is a weather based indicator for assessing crop development.
It is defined as mean daily temperature above a certain threshold base temperature on a daily basis over a period of time.
The negative values are treated as zeroes and ignored.
Calculation of growing degree day (GDD) =
{Tmax. + Tmin.}/2-Tbase
GDD calculation for question= {30+10}/2-10
=20-10=10°C
Hence, GDD for given crop is 10°C.
Add Answer to:
Question 1 5 pts What is the growing degree days of a crop that has grown...
1. (relative humidity) The partial pressure of water vapor in air is usually less than the...
1. (relative humidity) The partial pressure of water vapor in air is usually less than the equilibrium vapor pressure (or saturation pressure) at the ambient temperature; this is why a cup of water will spontaneously evaporate. The ratio of the partial pressure of water vapor to the equilibrium vapor pressure (at the same temperature) is called the relative humidity. Saturated air, at 100% relative humidity, would be in equilibrium with a cup of liquid water. The saturation pressure depends strongly...
A person breathes 10 liters per minute of air that is at 68 degree and 50%...
A person breathes 10 liters per minute of air that is at 68 degree and 50% relative humidity. [Relative humidity is the ratio of the actual vapor density to the saturation vapor density. The saturation vapor density is the maximum amount of water vapor that the air can hold at a particular temperature and is given in grams/meter cu bed] Given: Saturation vapor density at 20 deg. Celsius = 17.3 grams/meter cubed Saturation vapor density at 37 deg. Celsius =...
1 kg of atmospheric air initially at 30 ºc and 60% relative humidity is cooled slowly,...
1 kg of atmospheric air initially at 30 ºc and 60% relative humidity is cooled slowly, at a constant pressure of 100 kPa, to a final temperature of 5 ºc. a. What is the saturation pressure of water at the initial temperature? b. What is the partial pressure of water vapor (vapor pressure) at the initial condition? c. What is the partial pressure of dry air at the initial condition? d. What is the initial humidity ratio? e. What is...
WIPER Late on an wutumn day, the relative humidity's 26.0% and the temperature is 20.0°C. What...
WIPER Late on an wutumn day, the relative humidity's 26.0% and the temperature is 20.0°C. What will the relative humidity be that evening when the temperature has dropped to 10.0°C, suming constant water vapor density Take the saturation vapor density at 20.0°C to be 172 mand a 10.0°C to be 9.40 g/m % Additional Materials
We are learning about relative humidity. 1st part- what is the water vapor content at 25 degree C air if its relative humidity is 50%? 50=10/20 x 100% gives me the water vapor content of 10g/kg. 2nd p...
We are learning about relative humidity. 1st part- what is the water vapor content at 25 degree C air if its relative humidity is 50%? 50=10/20 x 100% gives me the water vapor content of 10g/kg. 2nd part- If the air was at 25 degree C at sea level, and rises to 1,000 meters, then what will its temperature be? It will drop by 10 degree C, so the temperature will be 15 degrees C. At 15 degree's C the...
Geography 01 Physical Geography East Los Angeles College Spring 2019 Exercise 4: Atmospheric Mois...
I am needing help with this assignment for my Geography class.
Can anyone help out?
Geography 01 Physical Geography East Los Angeles College Spring 2019 Exercise 4: Atmospheric Moisture Suggested Reading: Hess, pp 132-138 KEY TERMS: Absolute Humidity, Relative Humidity, Saturation Capacity, Dew Point, Warm air has relatively greater capacity to hold water vapor than does cooler air. As air warms, its capacity to hold moisture increases at an increasing rate; this means that if a source of moisture is...
6. The following systems contain water vapor (steam) in air. Which one has the highest partial...
6. The following systems contain water vapor (steam) in air. Which one has the highest partial pressure of water? You may assume ideal gas behavior. A. Saturated water vapor at 20 °C and 1 atm B. Water vapor at 90% relative humidity at 50 °C and 1 atm C. Water vapor at 90% relative humidity at 50 °C and 2 atm D. Water vapor at 70% relative humidity at 80 °C and 1 atm Explain your answer (4 pts):
An open 1.00 m plexiglass box has been sitting for a long time in a room...
An open 1.00 m plexiglass box has been sitting for a long time in a room that is maintained at 20.0°C and 30% relative humidity. One tablespoon (15 ml) of water is introduced into the box and the box is then closed and sealed. Once equilibrium is reached, what will be the humidity in the box? Hints: 1) The relative humidity is defined as the partial pressure of the H2O vapor divided by the saturation pressure. 2) For this problem,...
An air mass has a temperature of 18°C and a relative humidity of 42%. a) Determine the vapor pres...
An air mass has a temperature of 18°C and a relative humidity of 42%. a) Determine the vapor pressure and saturation vapor pressure of the air. You can use tables from the Gupta text, or the equations presented in class (which are alsc in the evapotranspiration references on the camino site). Or you may use both to be more confident of your work. b) Assume the air mass rises and cools at a rate of -10 C/km. At what elevation...
SKMM 2423 QUESTION 4 a) Cold water flows through a metal pipe, which is not insulated The pipe is loc ated in am am...
SKMM 2423 QUESTION 4 a) Cold water flows through a metal pipe, which is not insulated The pipe is loc ated in am ambient air, which is at a higher temperature and humidity, What do you think would be observed on the surface of the pipe? Describe briefly the reason for this 5 marks) b) A sling psychrometer shows a dry bulb and wet bulb temperature readings of 25°C and 20°C, respectively. The atmospheric pressure is 101 325 kPa. Using...
1. (relative humidity) The partial pressure of water vapor in air is usually less than the equilibrium vapor pressure (or saturation pressure) at the ambient temperature; this is why a cup of water will spontaneously evaporate. The ratio of the partial pressure of water vapor to the equilibrium vapor pressure (at the same temperature) is called the relative humidity. Saturated air, at 100% relative humidity, would be in equilibrium with a cup of liquid water. The saturation pressure depends strongly...
A person breathes 10 liters per minute of air that is at 68 degree and 50% relative humidity. [Relative humidity is the ratio of the actual vapor density to the saturation vapor density. The saturation vapor density is the maximum amount of water vapor that the air can hold at a particular temperature and is given in grams/meter cu bed] Given: Saturation vapor density at 20 deg. Celsius = 17.3 grams/meter cubed Saturation vapor density at 37 deg. Celsius =...
WIPER Late on an wutumn day, the relative humidity's 26.0% and the temperature is 20.0°C. What will the relative humidity be that evening when the temperature has dropped to 10.0°C, suming constant water vapor density Take the saturation vapor density at 20.0°C to be 172 mand a 10.0°C to be 9.40 g/m % Additional Materials
I am needing help with this assignment for my Geography class.
Can anyone help out?
Geography 01 Physical Geography East Los Angeles College Spring 2019 Exercise 4: Atmospheric Moisture Suggested Reading: Hess, pp 132-138 KEY TERMS: Absolute Humidity, Relative Humidity, Saturation Capacity, Dew Point, Warm air has relatively greater capacity to hold water vapor than does cooler air. As air warms, its capacity to hold moisture increases at an increasing rate; this means that if a source of moisture is...
6. The following systems contain water vapor (steam) in air. Which one has the highest partial pressure of water? You may assume ideal gas behavior. A. Saturated water vapor at 20 °C and 1 atm B. Water vapor at 90% relative humidity at 50 °C and 1 atm C. Water vapor at 90% relative humidity at 50 °C and 2 atm D. Water vapor at 70% relative humidity at 80 °C and 1 atm Explain your answer (4 pts):
An open 1.00 m plexiglass box has been sitting for a long time in a room that is maintained at 20.0°C and 30% relative humidity. One tablespoon (15 ml) of water is introduced into the box and the box is then closed and sealed. Once equilibrium is reached, what will be the humidity in the box? Hints: 1) The relative humidity is defined as the partial pressure of the H2O vapor divided by the saturation pressure. 2) For this problem,...
An air mass has a temperature of 18°C and a relative humidity of 42%. a) Determine the vapor pressure and saturation vapor pressure of the air. You can use tables from the Gupta text, or the equations presented in class (which are alsc in the evapotranspiration references on the camino site). Or you may use both to be more confident of your work. b) Assume the air mass rises and cools at a rate of -10 C/km. At what elevation...
SKMM 2423 QUESTION 4 a) Cold water flows through a metal pipe, which is not insulated The pipe is loc ated in am ambient air, which is at a higher temperature and humidity, What do you think would be observed on the surface of the pipe? Describe briefly the reason for this 5 marks) b) A sling psychrometer shows a dry bulb and wet bulb temperature readings of 25°C and 20°C, respectively. The atmospheric pressure is 101 325 kPa. Using...
Most questions answered within 3 hours.
-
Sufficient dwelling coverage. Mullai and Sri have owned their
home for 17 years. When they purchased...
asked 40 seconds from now -
Does Dallas Texas have any restricted funds? Special Revenue
Funds? List them
asked 3 minutes ago -
Consider the following unbalanced equation. Pb(s) + Mg2+(aq)
right --> Mg(s) + Pb2+(aq)
(a) What are...
asked 9 minutes ago -
You have a patient that has been suffering from an infectious
disease for two years. The...
asked 20 minutes ago -
Every working day the number of students visiting library
follows a non homo- geneous Poisson process...
asked 22 minutes ago -
Who is Joaquin in the poem Yo Soy Joaquin?
A. Jaoquin is an historical figure that...
asked 28 minutes ago -
4. A voltaic cell employs the following redox reaction: 2
Fe3+(aq) + 3 Mg(s) → 2...
asked 32 minutes ago -
Glycosidic linkages between monosaccharides form
polysaccharides. Which of the following would not be covalently
bonded through...
asked 34 minutes ago -
A recent national survey found that high school students watched
an average (mean) of 6.5 movies...
asked 38 minutes ago -
What is the minimum wavelength of photons needed to produce
60.0-keV electrons in Compton scattering? What...
asked 47 minutes ago -
Business Class
18. To be a Holder in Due Course (HDC), a transferee must take
the...
asked 49 minutes ago -
12) A so-called friend has offered to loan you $1,000 for one
year. At the end...
asked 1 hour ago