A transformer connected to a 110–(V) (rms) ac line is to supply 10.0 (V) (rms) to a portable electronic device. The load resista
1 answer:
You might be interested in
Answer:
(a). The pressure is 14.76 psi.
(b). The pressure is 15.59 psi.
(c). The pressure is 15.68 psi.
All answer are reasonable.
Explanation:
Given that,
Speed v₁= 60 mph
Speed v₂ = 225 mph
Speed v₃ = 235 mph
(a). We need to calculate the maximum pressure on his hand
Using equation of pressure
there, no vertical movement
So, on neglect of height term
Where, P= atmospheric pressure
= air density
v = speed
Put the value in the equation
(b). Speed v₂ = 225 mph
We need to calculate the maximum pressure on his hand
Using equation of pressure
Put the value in the equation
(c). Speed v₃ = 235 mph
We need to calculate the maximum pressure on his hand
Using equation of pressure
Put the value in the equation
According to bernoulli's equation,
If the car increases the velocity the the pressure on the surface of the driver's hand increases.
The pressure from P₁ to P₃ are all near the value of one atmosphere.
So, the pressure difference of one atmosphere is not enough to break the driver's hand.
Hence, (a). The pressure is 14.76 psi.
(b). The pressure is 15.59 psi.
(c). The pressure is 15.68 psi.
All answer are reasonable.
If the tension in the rope is 160 n, - 43200 J work doen by the rope on the skier during a forward displacement of 270 m.
Given,
Tension force in the rope is (T) = 160 N
Displacement of the skier (S) = 270 m
The displacement takes place in forward direction while the direction of the tension in the rope is opposite to it.
Therefore, work done by the rope on the skier is,
⇒
Hence work done by the rope is - 43200 J.
Learn more about force problems on
#SPJ4