Answer:
a)f=2.25 Hz
b)Time period T=.144 s
c)tex]V_{max}[/tex]=0.42 m/s
d)Phase angle Ф=87.3°
e)
Explanation:
a)
Natural frequency
=14.14 rad/s
w=2πf
⇒f=2.25 Hz
b) Time period
T=
Time period T=.144 s
c)Displacement equation
Boundary condition
t=o,x=0.03 m
t=0,v=.02m/s , V=
Now by using these above conditions
A=0.03,B=0.0014
x=0.03 cos14.14 t+0.0014 sin14.14 t
⇒x=0.03003sin(14.14t+87.3)
=0.42 m/s
d)
Phase angle Ф=87.3°
e)
Maximum acceleration
=6.0041
Answer:
He probably tripped the wiring, when metal hits the electricity it creates a reaction that burns the wiring.
Explanation:
Answer:
The correct option is;
Loose cords
Explanation:
Based on the 2011 Census of Occupational Injuries, which is published by the Bureau of Labor Statistics, one of the leading causes of injuries at work is slips, trips and falls which may lead long duration of time down and large huge amount of claims for compensation. Slips trips and falls are also comes fourth in the reasons of fatality at work
Trip hazards are hazards that causes trip and fall by stopping and locking the movement of the step of people walking along traffic lanes
Items that cause trips mainly include item used for work. The correct option is therefore loose cords, which should be kept under cable bridges for safety.
Answer:
|W|=169.28 KJ/kg
ΔS = -0.544 KJ/Kg.K
Explanation:
Given that
T= 100°F
We know that
1 °F = 255.92 K
100°F = 310 .92 K
We know that work for isothermal process
Lets take mass is 1 kg.
So work per unit mass
We know that for air R=0.287KJ/kg.K
W= - 169.28 KJ/kg
Negative sign indicates compression
|W|=169.28 KJ/kg
We know that change in entropy at constant volume
ΔS = -0.544 KJ/Kg.K