Answer:
α =
Explanation:
Applying the equations of motion to determine angular acceleration of the unit,
The sum of moments about O is equal to the product of angular acceleration and moment of inertia
∑Mo = Io*α
Taking the anticlockwise direction as positive moment,
= ( -(1150) + (1400) ) * (0.5 / 2) + ( (475) - (650) ) * (0.3 / 2) - F = Io*α
= 36.5 - (2.5 N.m) =*α
NOTE: moment of inertia of the pulleys in this instance =
Hence, 33.75 = * α
Solving, α =
An extremley low pressure system can create a HURRICAN<-----
Answer:
Temperature of the air in the balloon = 272°C
Explanation:
Given:
Volume of balloon = 500 m³
Air temperature = 15° C = 273 + 15 = 288 K
Total weight = 290 kg
Density of air = 1.23 kg/m³
Find:
Temperature of the air in the balloon
Computation:
Density of hot air = Density of air - [Total weight / Volume of balloon]
Density of hot air = 1.23 - [290 - 500]
Density of hot air = 0.65 kg/m³
[Density of hot air][Temperature of the air in the balloon] = [Density of air][Air temperature ]
Temperature of the air in the balloon = [(1.23)(288)]/(0.65)
Temperature of the air in the balloon = 544.98
Temperature of the air in the balloon = 545 K
Temperature of the air in the balloon = 545 - 273 = 272°C
Answer: shorter higher
Explanation:
Compare to visible light,The wavelength of x rays is shorter and the frequency is higher
Answer:
Work done=114, 777 J
Power= 1912.95 W
Explanation:
Work done is the product of force and distance moved, expressed as
W=Fd
But F=mg hence substititing back into the formula of work done
W=mgd
Where m is mass, g is acceleration due to gravity, d is distance
Since they are six people, the mass will be 65*6=390 kg
Taking g as 9.81 m/s² and d as 30 m
W=390*9.81*30=114,777 J
Power is defined as the rate of work done per unit time
P=W/t
Where W is work done, P is power and t is time.
Substituting t for 60 seconds and W with 114,777 J
P=114,777÷60=1,912.95 W