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- Determine a the specific humidity, b the enthalpy, c the relative humidity, d the dew-point temperature and e specific volume of the air. The mixture is heated until it exits at 35 o C. The pressure remains constant at kPa. Determine a the rate of...
- Determine a the exit temperature, b the exit relative humidity of the air and c the exit velocity. Air enters the heating section at Determine a the exit temperature, b the exit relative humidity and c the exit velocity. Air leaves the humidifying...
- Air leaves the cooling section saturated at 72 o F. The mixture is cooled to 10 o C; by circulating cold water before being electrically heated back to 30 o C. Determine a the inlet R. Air leaves at 70 o F. Determine a the mass flow rate of water and b the exit humidity. Assume the pressure and wet-bulb temperature to remain constant along the flow. Determine a the exit temperature of the air, b the required rate of water supply to the evaporative cooler. Determine a the the final relative humidity and b the amount of water added to the air. Determine a the R. Assuming that the mixing process occurs at a pressure of 1 atm, determine a the specific humidity, b relative humidity, c the dry-bulb temperature and d the volume flow rate of the mixture. Determine a the temperature, b the specific humidity and c the relative humidity of the mixture. Assuming a total pressure of 1 atm, determine a the temperature, b the specific humidity and c relative humidity of the mixture.
- Neglecting the power input to the fan, determine a the volume flow rate of air into the cooling tower and b the mass flow rate of the required makeup water. Neglecting the power input to the fan, determine a the volume flow rate of the air into the cooling tower and b the mass flow rate of the required makeup water. The water is cooled to 85 o F in the cooling tower by air which enters the tower at 1 atm, 73 o F, 50 percent relative humidity and leaves saturated at 90 o F.
- These characteristics are stored in the db. Section 9. See Section The database name can be omitted from the first syntax, in which case the statement applies to the default database. It is intended to update a database directory name to the current encoding format if the name contains special characters that need encoding. For example,if a database in MySQL 5. In MySQL 5.
- MySQL Enterprise In a production environment, alteration of a database is not a common occurrence and may indicate a security breach. Advisors provided as part of the MySQL Enterprise Monitor automatically alert you when data definition statements are issued. References to stored routines, user-defined functions, and tables in such cases are specifically disallowed, and fail with an error see Bug That privilege is granted automatically to the function creator.
- By default, that privilege is granted automatically to the procedure creator. The corresponding fields in the mysql. For example, you can add or delete columns, create or destroy indexes, change the type of existing columns, or rename columns or the table itself. You can also change the comment for the table and type of the table. Some operations may result in warnings if attempted on a table for which the storage engine does not support the operation.
- The alteration is performed on the copy, and then the original table is deleted and the new one is renamed. Updates and writes to the table are stalled until the new table is ready, and then are automatically redirected to the new table without any failed updates. The temporary table is created in the database directory of the new table. In some cases, no temporary table is necessary: Alterations that modify only table metadata and not table data can be made immediately by altering the table's. The following changes are fast alterations that can be made this way: Renaming a column or index. Changing the default value of a column. Changing the definition of an ENUM or SET column by adding new enumeration or set members to the end of the list of valid member values.
- Any privileges granted specifically for the renamed table are not migrated to the new name. They must be changed manually. If other cases, MySQL creates a temporary table, even if the data wouldn't strictly need to be copied. Incorrect values are truncated to the closest matching acceptable value. Section For InnoDB, if the value is less than the current maximum value in the column, no error occurs and the current sequence value is not changed. To do so, specify the old and new column names and the definition that the column currently has. Attributes present in the original definition but not specified for the new definition are not carried forward. Warning This conversion may result in alteration of data. For example, if you shorten a string column, values may be truncated. The default is to add the column last. If columns are dropped from a table, the columns are also removed from any index of which they are a part.
- If all columns that make up an index are dropped, the index is dropped as well. If a table contains only one column, the column cannot be dropped. If there is no primary key, an error occurs. Some storage engines allow you to specify an index type when creating an index. The preferred position is after the column list.
Relocation Directive - Chapter 12 - Moves To And From Outside Canada
Use of the option before the column list will no longer be recognized in a future MySQL release. USING is one such option. Note that the table does not remain in this order after inserts and deletes. This option is useful primarily when you know that you are mostly to query the rows in a certain order most of the time. By using this option after major changes to the table, you might be able to get higher performance. In some cases, it might make sorting easier for MySQL if the table is in order by the column that you want to order it by later. The default is ascending order. Only column names are allowed as sort criteria; arbitrary expressions are not allowed. InnoDB always orders table rows according to such an index if one is present. MySQL does this with a special algorithm that is much faster than inserting keys one by one, so disabling keys before performing bulk insert operations should give a considerable speedup.- For other storage engines, the clauses are parsed but ignored. The reason for accepting but ignoring syntax clauses is for compatibility, to make it easier to port code from other SQL servers, and to run applications that create tables with references. See Section 1. Note Partitioned tables do not support foreign keys. You must use separate statements. For an InnoDB table that is created with its own tablespace in an. To discard the. Attempting to access the table while the tablespace file is discarded results in an error.
- To import the backup. For example, a TEXT column has two length bytes, which store the byte-length of values in the column, up to a maximum of 65, For a latin1 TEXT column, each character requires a single byte, so the column can store up to 65, characters. This is not what you want if you have a column in one character set like latin1 but the stored values actually use some other, incompatible character set like utf8.
Chapter 12 - Section 12.1 - Angles And Polygons - Exercise - Page 387: 2
ADD column. Partitioning-related clauses for ALTER TABLE can be used with partitioned tables for repartitioning, for adding, dropping, merging, and splitting partitions, and for performing partitioning maintenance. This includes the rules governing the relationship between any unique keys including any primary key that the table might have, and the column or columns used in the partitioning expression, as discussed in Section It is also not possible to rename a partition or a partitioned table. Instead, if you wish to rename a partition, you must drop and re-create the partition; if you wish to rename a partitioned table, you must instead drop all partitions, rename the table, and then add back the partitions that were dropped. In this case, partitions 4 and 5 will be merged into the first 4 partitions the partitions numbered 0, 1, 2, and 3. This statement can be used in several ways: To merge a set of partitions into a single partition. To split an existing partition into several partitions.- Note For partitions that have not been explicitly named, MySQL automatically provides the default names p0, p1, p2, and so on. The same is true with regard to subpartitions. The partitions must already exist in the table to be altered. For more information and examples, see Section See Section 5. This occurs because the order in which the rows are numbered depends on the specific storage engine used for the table and the order in which the rows were inserted.
Zeroth Law Of Thermodynamics: Thermal Equilibrium - Physics | OpenStax
Assignment Answers Ch 12 Review Answers: Newton thought that a force must act on the Moon because, since it moves in a curved almost, but not quite circular path, it is accelerating. After all, the direction of its velocity is constantly changing, and acceleration is the rate velocity changes. An acceleration requires a net force 2nd Law. The Moon and every other Earth satellite is in free fall toward the Earth, but it is a projectile whose tangential velocity keeps it from getting closer to the Earth.- In the same time that the Moon falls a centimeter, the Earth curves a centimeter out from under it! In order for a scientific hypothesis to advance to the status of a scientific theory, it must be thoroughly and extensively tested. The small size of the gravitational constant G tells you that the gravitational force is actually quite weak compared to other known forces like the electric, magnetic, and nuclear forces. You need to know: 1 your mass, 2 the Earth's mass, and 3 the radius of the Earth in order to determine the gravitational force on you, which is your weight. The gravitational force is an inverse-square-law force - the strength of the force decreases with the square of the distance between objects.
Stoichiometry Section 12 1 The Arithmetic Of Equations Worksheet Answers
In other words, twice the distance means one-fourth of the force, three times the distance means one-ninth of the force, etc. Comparing the answers for this question and the last one, notice that the gravitational force that the Sun exerts on the Moon is about times as much as the gravitational force that the Earth exerts on the Moon. Why, then, does the Moon orbit the Earth and not the Sun? The same thing can be said about every object in the universe - including you! The same amount of force. This gravitational force is the force we commonly call her weight.- If the gravitational force of the Sun on the planets suddenly disappeared, they would move off with the velocity that they had at that instant Newton's 1st Law. So, they would move in a straight line tangent to their orbit, at constant speed. A rocket going from the Earth to the Moon would require more fuel. Since the Earth has more mass than the Moon, the Earth will exert a larger gravitational force on the rocket than the Moon would things weigh less on the Moon. This means that the rocket would have to exert a larger force to balance its weight leaving the Earth than leaving the Moon. Since the rocket exerts a larger force leaving the Earth, it must do more work to leave the Earth, which takes more energy in the form of chemical potential energy stored in the rocket fuel. Gravitational forces on a galaxy near the "edge" of the Universe. Not all forces are shown. Net force on a galaxy near the "edge" of the Universe. The observation that the expansion of the Universe is slowing down is consistent with the law of gravity.
HS-PS Motion And Stability: Forces And Interactions | Next Generation Science Standards
Every object in the Universe attracts every other object in the Universe with a gravitational force. The diagram on the left above shows some of the gravitational forces on a galaxy near the "edge" of the universe. Looking at the diagram you can see that all of the forces on this galaxy point "inward", since all gravitational forces are attractive. This means that the net force on this galaxy points "inward" toward the "center" of the Universe, as shown in the diagram at right above. So, if the galaxy is moving away from the "center" of the Universe an expanding universe , then the net force on the galaxy will act to slow the galaxy down, and the expansion of the Universe should be slowing down.- However, recent observations since the publication of your text seem to indicate that the expansion of the Universe is in fact NOT slowing down - in fact, the Universe seems to be accelerating. This is contrary to the behavior that the law of gravity predicts as described above. This is an area of very heated and intense research and discussion at the moment. If the Universe's expansion is really speeding up, then there has to be some previously-undetected force that is driving it. What could that force be? Your weight is the gravitational force between you and the Earth.
Chapter 12 - Section 12.1 - The Algebra Of Functions - Exercise Set - Page 842: 5
Why is it difficult to walk on ice? Answer: It is difficult to walk on ice because the friction between feet and ice is less, Question When a boat is moving in the river, does the water offer force of friction to its movement? Answer: Yes, the water opposes the movement of the boat. When your writing desk is tilted a little, a book kept on it starts sliding down. Mention the direction of the frictional force acting on it. Answer: The frictional force acts in the upward direction. Question 2. You spill a bucket of soapy water on a marble floor accidently. Would it make easier or more difficult for you to walk on the floor? Question 3. Put a tick mark on the correct choice : When one object moves over the surface of other object. Answer: Surfaces of both the objects exert force in a direction opposite to each other. Question 4. Four children have got similar toy cars.- They run the car on the dry marble floor, wet marble floor, newspaper and towel simultaneously. The force of friction between the car and different surfaces in increasing order will be : Wet marble floor, dry marble floor, newspaper and towel. Newspaper, towel, dry marble floor, wet marble floor. Towel, newspaper, dry marble floor, wet marble floor. Dry marble floor, wet marble floor, towel, newspaper. Answer: Wet marble floor, dry marble floor, newspaper and towel. Question 5. Explain why sportsmen use shoes with spikes. In this way, the sportsman can run faster. Question 6. Iqbal has to push a lighter box and Seema has to push a similar heavier box on the Who will have to apply a larger force and why? For a heavier box the ridges of the surfaces get interlocked more. Question 7. Explain why sliding friction is less than static friction. To make the body slide, more force is required to overcome the irregularities in the surface of the body. Question 8. Explain why objects moving in fluids must have special shapes.
Relocation Directive - Chapter 12 - Moves To And From Outside Canada - Medicoguia.com
Therefore, the shape of the body is streamlined to over the frictional force of fluids and to move smoothly through them. Question 9. Why does the force of friction exist? Answer: Friction is caused by the irregularities on the two surfaces in contact. Question Can we have surfaces with zero friction? Answer: No, the friction can be less in some surfaces, but it can never be zero.- Which surface have more friction — rough or smooth? Answer: Rough surfaces have more friction because they have larger number of irregularities. Why is it possible to write on rough blackboard with chalk? Answer: The chalk is rubbed on the rough blackboard while writing. In the process soft chalk particles get stuck to the irregularities of rough blackboard susfare making the writing visible. A ball is set rolling on the ground. Will it stop by itself? Answer: The ball will stop after sometime because the force of friction is acting from the opposite direction. Why do the soles of shoes wear out? Answer: The soles of shoes wear out due to the friction between the soles and the ground. Why are the soles of shoes grooved? Answer: Soles of shoes are grooved so as to provide better grip between the shoes and the ground.
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