Why does air pressure decrease with increasing height? Why is there an increasing demand for water? How can one know if a chemical reaction will take place? From a laboratory process designed to separate water
Why does the pressure decrease when water flowing in a broad pipe enters into a narrow pipe? Bernoulli's Principle: Bernoulli's theorem is a principle in fluid dynamics that states that the total energy in a fluid flowing through a pipe or channel is constant. T...
from the same height. The kinetic energy exchange in both dropped objects was the same at the moment of impact. Compare the difference in effect; the egg breaks while the ball rebounds undamaged.Most living animal soft tissue has a consistency much closer to that of the rubber ball than to...
1. Why must heat energy be supplied to melt ice? 2. After all, does the temperature not change? Explain how water's entropy can decrease when it freezes without violating the second law of thermodynamics. Specifically, explain what happen...
Why does atmospheric pressure decrease more rapidly than linearly with altitude? How many helium atoms are contained in the balloon? Why is the air pressure important? When you rub a balloon on your head, it will tend to stick to the wall. Why does this happen?
Why does air rise at the equator? Why do tires have a better grip of the road while going on a level road than while going on an incline? Explain. Why does air sink at the poles? A balloon filled with helium does not rise in the air indefinitely but halts after a certain height. ...
Why is a vehicle in storage with its body raised high on blocks less stable than a similar vehicle with its body at normal height? Explain how and why the velocity of an object changes when it falls in a viscous fluid....
Does velocity always decrease if acceleration is negative? In terms of kinetic and potential energy, why must a skater be at a specific height at the start to successfully reach the end of the ramp? An object is thrown downward with an initial speed of 16 m/s...
Why does the normal force decrease as the angle increases? Does centripetal force change when radius changes? Why does friction increase with mass? Why doesn't a heavy object accelerate more than a light object when both are freely falling? Is the net force the same...
At what wind speed (in m/s) does -20 degree C air cause the same chill factor as still air at -52 degree C? How does density of air decrease with increases in humidity? Explain in detail. Explain why your ears pop when you ascend to hig...