Reputation
10,753
Top tag
Next privilege 15,000 Rep.
Protect questions
Badges
22 40
Newest
 Generalist
Impact
~686k people reached

Apr
2
awarded  Good Answer
Mar
26
answered Modelling an Airplane Question
Mar
24
comment Torricelli's speed of efflux law
@Schrodinger: It is talking about velocity at the port, not some distance away. Of course if the flow is vertical it will gain kinetic energy proportional to how far it has fallen from the port, but then it is no longer in the port.
Mar
24
comment Physics Aviation performance ATPL (A) Climb rate and gradient
Aviation is the place for this, but I am a student pilot. The gradient is the climb angle. The rate of climb also depends on the speed. It is the airspeed times the sine of the climb angle. Assuming the thrust is constant, the pilot chooses the climb angle that yields the desired speed and rate of climb. Look up V-speeds. Vx is a slow speed that has the highest climb angle (in case of trees); Vy is a faster speed that has the highest climb rate. Generally you want altitude as quickly as possible, for safety if power failure.
Mar
23
comment Light scattering - creating an atmosphere that a laser will be visible in
Dust or flour, and a fan.
Mar
21
comment Bernoulli principle and viscous loss
Why does the flow remain the same? R will convert the kinetic energy to heat, slowing down the fluid until it effectively stops. The fluid will feel this slowing force as a pressure drop across the resistor.
Mar
20
awarded  Favorite Question
Mar
18
answered Pressure in a fluid
Mar
17
revised Question about propellers
added 42 characters in body
Mar
17
answered Question about propellers
Mar
16
revised Does Free Will Theorem imply that quantum mechanics plays crucial role in our brain’s functioning (consciousness)?
added 195 characters in body
Mar
16
answered Does Free Will Theorem imply that quantum mechanics plays crucial role in our brain’s functioning (consciousness)?
Mar
16
comment Why aren't clouds multi-colored?
Clouds are multi-colored. Mix together all the colors, and what you see is white. In fact, I'm typing this on a screen that looks white. A magnifying glass shows that it is not white. It is red, green, and blue.
Mar
15
comment Free falling and bouncing back
Look up discontinuity. Here, the velocity is negative, then positive. You can't really find a time when it is in between, not unless you want to model at the atomic level. Functions that are discontinuous cannot be differentiated, so calculus doesn't work across discontinuities. So how do you model it? In sections, that's how.
Mar
15
awarded  Good Answer
Mar
15
awarded  Mortarboard
Mar
15
awarded  Nice Answer
Mar
15
answered Why do beams of light (from torches or other directed sources) not extend to infinity?
Mar
14
awarded  Excavator
Mar
14
revised Which moment of intertia do I need to calculate torque
deleted 60 characters in body