Answer:
C
Explanation:
Pitot tube:
Pitot tube is a device which is used to measure the velocity of flow by measuring pressure difference between the points.
As we know that stagnation pressure is the summation of dynamic and static pressure.
Stagnation pressure = Static pressure + Dynamic pressure
So
Dynamic pressure = Stagnation pressure - Static pressure
We know that dynamic pressure

On the other hand Pitot tube measure the dynamic pressure.
So option C is correct.
Answer:
The objective of a properly proportioned concrete mix are:
- To produce the combination of cementitious material, water, and aggregate that meets the requirements of a particular structure, portion of a structure, or series of structures at least cost.
- To produce concrete of the specified properties.
- To produce a satisfactory of end product, such as beam, column or slab as economically as possible.
Cheers!
Answer:
T1 = 299.18 °C
P2 = 0.00738443 MPa
Explanation:
From the data, we can get two properties for the initial condition. These are pressure and specific volume.
The pressure is 1.8 MPa and the specific volume, we can get it with the mass and volume of the container, since it’s filled this is also the volume of the water in it.

When we check in the thermodynamic tables, the conditions for saturation at 1.8 MPa we found the following:


specific volume for the saturated vapor
specific volume for the saturated liquid
Since the specific volume in our condition is higher that the specific volume for the saturated vapor, we have a superheated steam.
Looking in the thermodynamic tables for superheated steam we found that the temperature where the steam has a specific volume of
at 1.8 MPa is 299.18 °C. This is the initial temperature in the container.
Since the only information that we have about the final condition is that the container was cooled. We can assume that it was cooled until a condition of saturation. So, the final pressure for the water will be the pressure of saturation for a temperature of 40°C. From thermodynamic tables we get:

Answer:
Explanation:
Heat dissipated by 26 people per second
= 26 x 360 x 1000 / (60 x 60)
= 2600 J
Heat dissipated by bulbs per second
= 15 x 40
= 600 J
Heat dissipated by fans per second
200 J
Heat dissipated by air coming in
= 200 x 10 x 1000 / (60 x 60)
=555.55 J
Heat gain by walls
= 5000 x 1000 / (60 x 60)
= 1388.88 J
Total heat gain per second
= 2600 + 600+200+555.55
= 3955.55 J
Capacity of air-conditioner required
= 3955.55 J/s
= 3.9 kJ/s
= 3.9kW
= 4 kW