Answer:
unit =1.83
Explanation:
The cooling load is due to people, lights, and heat transfer through the walls and the windows so. The total cooling load of the room is determined from
(Equation 1) Q cooling = Q lights + Q people + Q heat gain
there fore
Q cooling = 10 x 100 W = 1 KW
Q people = 40 x 360 KJ/h = 4 KW
Q heat gain = 15.000 kJ/h = 4.17 KW
we replace the values in Equation 1
Q cooling = Q lights + Q people + Q heat gain
Q cooling = 1 + 4 +4.17
Q cooling = 9.17 KW
Thus the number of air — conditioning units required is
9.17 KW /5 KW unit =1.83
Answer:
v = 8.63 m/s
Explanation:
Neglecting the frictional forces, the law of conservation of energy can be applied to this situation as follows:
Potential Energy Gained By Athlete = Kinetic Energy Lost By Athlete
mgh = (0.5)mv²
gh = (0.5)v²
v = √2gh
where,
v = speed that the athlete must have when he plants the pole = ?
g = acceleration due to gravity = 9.8 m/s²
h = Height to be achieved by the athlete = 3.8 m
Therefore,
v = √(2)(9.8 m/s²)(3.8 m)
<u>v = 8.63 m/s</u>
Answer:
It's a kinematic equation.
Explanation:
x displacement = (velocity_final * time) - (0.5 * acceleration * time * time)
You should be given a value, context(word problem), or diagram.
If you're deriving for a term just isolate the term.
If you're asking why the -(0.5 * acceleration * time * time) is negative instead of positive, would need context.
Answer:
0.381 m
Explanation:
Distance traveled S is found by
Where S is distance traveled, u is initial velocity, t is time, a is acceleration
Since we acceleration a is given as 60g, where g is gravitational constant of 9.81 then a=60*9.81=588.6
The initial velocity u is zero hence ut=0
Substituting a with 588.6, t with 36 ms
S=0.381 m