Answer:
t = 17658 s = 294.3 min = 4.9 h
Explanation:
The general formula for power is:
where,
P = Power of the Motor = 50 KW = 50000 W
W = Work Done by Motor = Change in P.E of Water = mgh
g = acceleration due to gravity = 9.81 m/s²
m = mass of water = ρV
h = depth of water = 180 m
ρ = density of water = 1000 kg/m³
V = Volume of Water = 500 m³
t = time taken = ?
Therefore,
<u>t = 17658 s = 294.3 min = 4.9 h</u>
Answer:
d=1.25 m
Explanation:
fd=.5mv2-.5mv1; 10(d)=.5(50)(.5)-0; 10(d)=12.5; d=12.5/10; d=1.25 m
This question involves the concepts of work done, pressure, and temperature.
The work done per mol of the air is "-724.71 J/mol".
Using the given formula for work done:
where,
W = work done per mol = ?
R = universal gas constant = 8.314 J/mol.k
T = absolute temperature = 30°C + 273 = 303 k
P₁ = initial pressure = 30 KPa
P₂ = final pressure = 40 KPa
Therefore,
<u>W = -724.71 J/mol</u>
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Learn more about pressure here:
brainly.com/question/23358029?referrer=searchResults
Answer:
24.5 N
Explanation:
The falling object experiences its weight acting downwards and the air resistance in the opposite direction.
The air resistance increases with velocity so there may come a point, depending on the shape of the object and if there is sufficient height, where these 2 forces are equal.
Since the object has no net forces acting on it it will, according to Newton, no longer accelerate but continue with a constant velocity.
This is called Terminal Velocity.
So:
Air resistance = weight
R
=
m
g
R
=
2.5
×
9.8 = 24.5N
Answer:
Explanation:
x(t) = (3.5 cm)cos[(0.8 rad/s)t]
Angular velocity ω = .8
Time period = 2π / ω
= 2 X 3.14 / .8
= 7.85 s
First time block will pass through equilibrium is T/4 ,
Second time block will pass through equilibrium
= 3.T/4
= 3/4 x 7.85
= 5.8875 s
