Sigma

When a single engine planes engine is at full power of 76kW, it gains altitude at 2.6m/s. The mass of the plane is 710kg. What fraction of the poewr is being used to make the plane climb. (The rest of the power overcomes the air resistance and inefficiencies in the prop and engine)

Please explain the equations as well, not just an answer. Thanks.

An ball is dropped from 6.0m above the ground. This means that the initial velocity is 0m/s. Ignoring air resistance, how long does it take before it hits the ground? What is the formula to figure this out too please. I want to know how to figure it out, not just the answer. Thanks.

An arrow is shot at an angle of 45 degrees above the ground. The arrow hits a target at the same level above the ground as it was shot from 220 m away. ( delta y = 0) Use 9.8m/sec for gravity. How long is the arrow in the air?

What is the indefinite integral of:

4e^(-3t) + sin 3e - 3t^4

Is this a decomposition reaction that breaks down into Na+ and ClO-? Or does this break down further to Na Cl2(g) and O2(g)?

Note: O2 and Cl2 are diatomic gases.

Of course this would make the original Bal Equation 2NaClO = 2Na(s) + Cl2(g) + O2(g).

What is the mass of NH³in a 80.0cm³sample which has a density of 0.92 g/cm³ and consists of 20.0% (by mass) NH³. (NH³ is supposed to be a subscript 3 meaning 3 atoms of hydrogen.)

Thanks for the help. Need right away please.

A. 20g

B. 25g

C. 45g

D. 15g

E. 74g

I have been referred to an Investment advisor by a friend who is highly successful and who's advice I admire and trust. Does anyone know of a website that tracks and rates financial planners / companies?

I spend a lot of time online doing complex mathematical stuff. Is there any place I can go or secret to learning what keyboard strokes and key combinations will give me symbols like integrals, squart root, summation (sigma) symbols and the like? Thanks for the help

I came up with the integration factor of -x. As i multiply it through, it still does not seem to make the equation exact. Please help!!!