The pressure at 0°F would be 4.5psi
<u>Explanation:</u>
Given-
Pressure, P1 = 5psi
Temperature, T1 = 50°F
T2 = 0°F
P2 = ?
To convert Fahrenheit to Kelvin we have to apply the formula:
(x°F 32) X 5/9 + 273.15
So,
0°F = (0-32) X 5/9 + 273.15 = 255.372K
50°F = (50-32) X 5/9 + 273.15 = 283.15K
According to gas equation,
Therefore, the pressure at 0°F would be 4.5psi
Answer:
the minimum power input required for this air-conditioning system is 1.20 hp
Explanation:
Given the data in the question;
Temperature inside ( Sink ) T = 70°F = ( 70 + 460 )R = 530 R
temperature outside ( source )T = 100°F = ( 100 + 460 )R = 560 R
= 800 Btu/min
= 100 Btu/min
Now, from the equation of coefficient of performance of refrigerator;
= Desired output / Required input
= / --------- let this be equation 1
= ( ) /
where is the rate heat gained through the wall
is the heat generation from people and lights and appliances.
Now, lets consider the equation coefficient of performance of refrigerator in terms of temperatures;
= / ( - )
we substitute
= 530 / ( 560 - 530 )
= 530 / 30
= 17.667
so we substitute into equation 1;
= / ---------
= ( ) /
17.667 = ( 100 + 800 ) /
17.667 = 900 /
= 900 / 17.667
= 50.94 Btu/min
= ( 50.94 / 42.53 ) hp
= 1.198 hp ≈ 1.20 hp
Therefore, the minimum power input required for this air-conditioning system is 1.20 hp
Answer:
Provide reinforcement for appropriate behavior.
Explanation:
The use of reinforcements by teachers have been effective in eliminating overt behaviors by students. Different types of “reinforcers” have been tried out and deemed successful in changing student behavior. Nodding of head, clapping and smiling (which express approvals of actions) are some of the social reinforcers, pre-planned by teachers to help instill acceptable deeds.
In some other cases, other powerfully motivating reinforcers have been for the student to select class activities they wish to participate in and the preferred classmate they hope to have in such activities.
Answer:
Maximum weight = 76.64 lb
Explanation:
In the second figure attached it can be seen the free body diagram of the problem.
The equation of equilibrium respect x-axis is
So, cable segmet AC supports bigger tension than segment AB. If then
The equation of equilibrium respect y-axis is