You generally need a transformer to operate a doorbell because doorbells are designed to work with much smaller voltages than wh
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To solve this problem it is necessary to apply the equations given from Bernoulli's principle, which describes the behavior of a liquid moving along a streamline. Mathematically this expression can be given as,
Where,
Pressure at each state
= Density
Velocity
Re-organizing the expression we can get that
Our values are given as
Normal Conditions
Replacing we have,
If we consider that there is a balance between the two states, the Force provided by gravity is equivalent to the Support Force, therefore
Here the lift force is the product between the pressure difference previously found by the effective area of the aircraft, while the Force of gravity represents the weight. There,
Equating,
Therefore the weight of the plane is 14535N
Answer:
0.345m
Explanation:
Let x (m) be the length that the spring is compress. If we take the point where the spring is compressed as a reference point, then the distance from that point to point where the ball is held is x + 1.1 m.
And so the potential energy of the object at the held point is:
where m = 1.3 kg is the object mass, g = 10m/s2 is the gravitational acceleration and h = x + 1.1 m is the height of the object with respect to the reference point
According to the conservation law of energy, this potential energy is converted to spring elastic energy once it's compressed
where k = 315 is the spring constant and x is the compressed length
x = 0.345 m or x = -0.263 m
Since x can only be positive we will pick the 0.345m