Recent content by HTT

My major is physics, and this is my second year of college. I looked those jobs on AIP and it really makes me nervous... Why most careers need PhD physics and Engineering?! :L I'm frustrated right now. I took one semester of computer science; I found that programming is not my thing. :mad:Give...

:) Thanks a lot~ Finally finished all my homework...

The original question is : An airplane is to fly directly from airport A to Airport B, a distance of 300km. The airspeed of the plane is 970km/hr. The wind blows to the airplane at a constant speed of 220km/hr.

Homework Statement One of my question asks that: How much longer is the flight from airport A to B with the wind as indicated than with no wind... I don't get its meaning. What do I need to solve for this question? Homework EquationsThe Attempt at a Solution

Homework Statement three boxes connected by strings. given the mass of each box, coefficient of static and kinetic friction, and a constant speed of 2.0 m/s I want to know how to get force by a given speed...! Also, at a constant speed, how do I get to know the acceleration? does a = 0? if a =...

Thank you so much, I think I got it~.

I'm not really understand this sentence from question, "Its fuel lasts for 10 sec" does it mean the time from the rocket start flying to hitting the ground. Or, other meanings...

Here are the equations I try to use: Vx =Vo+a*t displacement x = t/2(Vo+V) = Vo*t+(1/2)*a*t^2 (Vx)^2 = (Vo)^2 + 2a*displacement

Homework Statement A model rocket has an acc of 5m/s/s while its fuel is buring. Its fuel lasts for 10 sec. ignore the air resistance.Homework Equations a) max height above the ground of this rocket? b) the time this rocket in the air before it hits the ground? The Attempt at a Solution...