The pressure at the point on the roof where the speed is 60mph is 14.66 psi
<u>Explanation:</u>
The question follows Bernoulli's equation
P1 + 1/2 ρ V1² = P2 + 1/2 ρ V2²
V1 = 40 X 5280 / 3600 = 58.7 ft/s
V2 = 60 X 5280 / 3600 = 88 ft/s
P2 = P1 + 1/2 ( 0.00238 ) [(58.7)² - (88)²]
P2 - P1 = -5.12lb/ft²
The negative pressure created tends to lift the roof.
We know,
P1 = 14.7 psi = 2116.8 lb/ft²
P2 = 2116.8 - 5.12 lb/ft²
P2 = 2111.68 lb/ft²
P2 = 14.66 psi
Therefore, the pressure at the point on the roof where the speed is 60mph is 14.66 psi
Answer:
Explanation:
Given that;
Thermal diffusivity 
Thermal conductivity 
Heat transfer coefficient h = ( we are to assume the imposed surface temperature ) = 20 W/m².K
Initial temperature = 150 ° C = (150+273) K = 423 K
Then coolant temperature with which the casting is exposed to = 20° C = (20+273)K = 293 K
Time = 40 seconds
Length = 20mm = 0.02 m
The objective is to determine the temperature at the surface at a depth of 20 mm after 40 seconds.
Bi == 0.02
For a wall at 0.2 Bi
Therefore;
Answer:
Final osmolarity = 866 mOsm
Explanation:
Starting cell culture medium = 320 mOsm
30 mL of 1600 mM NaOH into 1 L= (30 mL/1000) x 1600 = 48 mM
Osmolarity = osmoles / 1 L = (Mole x equivalent) / L = 48 x 2 = 96 mOsm
Feed solution = (300 mL / 1000 mL) 1500 mOsm = 450 mOsm
Total osmolarity = 320 + 96 + 450 = 866 mOsm
Hope this helps!
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Mass The measure of the amount of matter in an object.
Answer:
1. True
2. True
3. False
Explanation:
The office location is where the soil layer is not uniform. The thickness of the soil varies which could lead to doors being jammed. The engineer needs to estimate the differential in clay soil.
The inclined surface can hold less weight than a vertical surface. The capacity to hold the weight is due to the gravitational force which is exerted to the load.
