Answer:
mainly used to combine two tables based on a specified common field between them. If we talk in terms of Relational algebra, it is the cartesian product of two tables followed by the selection operation. Thus, we can execute the product and selection process on two tables using a single join statement. We can use either 'on' or 'using' clause in MySQL to apply predicates to the join queries.
A Join can be broadly divided into two types:
Inner Join
Outer Join
Inner Join is a join that can be used to return all the values that have matching values in both the tables. Inner Join can be depicted using the below diagram.
The inner join can be further divided into the following types:
Equi Join
Natural Join
Now let us learn about these inner joins one-by-one.
Answer:
The direction of the magnetic field around the coil reverses. The force on the cone now pulls it back in. Repeatedly alternating the current direction makes the cone vibrate in and out. The cone vibrations cause pressure variations in the air, which are sound waves.
Explanation:So as it goes back and forth it makes a sound from the vibration.
Answer:
The velocity of the fluid is 1.1012 m/s
Solution:
As per the question, for the fluid:
Diameter of the capillary tube, d = 1.0 mm =
Reynolds No., R = 1000
Kinematic viscosity,
Now, for the fluid velocity, we use the relation:
where
= velocity of fluid
Answer:
Explanation:
Given.
Thickness of brass plate
Thermal conductivity of brass
Density of brass
Specific heat of brass
Thermal diffusivity of brass
Temperature of oven
The initial temperature
Plate remain in the oven
Heat conduction in the plate is one-dimensional since the plate is large relative to its thickness and there is thermal symmetry about the center plane.
The thermal properties of the plate are constant.
The heat transfer coefficient is constant and uniform over the entire surface.
The Fourier number is > 0.2 so that the one-term approximate solutions (or the transient temperature charts) are applicable (this assumption will be verified).
The Biot number for this process
The constants and corresponding to this Biot are, from 11-2 tables.
The interpolation method used to find the
and
The Fourier number
Therefore, the one-term approximate solution (or the transient temperature charts) is applicable.
Then the temperature at the surface of the plates becomes
Answer:
Explanation:
In order to keep your car running at its best, it’s important to keep up with routine maintenance and inspections. By properly maintaining your vehicle, you’ll reduce future repair costs, optimize your car’s performance, maintain its value and extend its life. Here are some regular maintenance needs to keep in mind for your vehicle: