Physics
The ratio of the resistances will be the same as the ratio of the resistivities, if lengths and diameters are the same. R(Cu)/R(Al) = 1.72 x 10-8/2.82 x 10-8 = 0.61 R(Al) = 0.509 Ù
heeeeeeeeeeeelp physics vrey tough
Never mind the General Relativity approach I suggested. Time goes slower at the lower orbit because of Special relativity . Use the two different satellite speeds to deduse the time shift for one orbit. You want the extra credit.. so you do the numbers
help physics very tough
I assume you are being asked about the change in the rate of a clock in a gravitational field (of the sun, in thic case). There is a General Relativity formula for it. (Due to Schwarzschild, I believe) delta T = T*(delta V)/c*2 V is the gravitational potential at distance d fr...
chemistry, not physics
What does the symbol h represent? The arrow from reactants to products? Here is one answer. 3 H2(g) + N2(g)-> 2 NH3(g) The others are not hard. You need to try them yourself.
Physics
Plane mass increases by a factor of 2^3 = 8. Plane lift increases by a factor 2^2 = 4 Plane drag increases by an unknown factor between 1 and 2. Engine power will have to increase to compenstate for increased prssure drag and boundary layer friction. The plane's velocity w...
SCI/220 HUMAN NUTRITION
What questions?
math
3% gets compounded 20 times. 5000*(1.03)^20 = $9030.56
physics
Your numbers require units. That is one of the first lessons you ahould have learned about physics.
physics
How fast is it accelerating? You don't say. To get the power required, you need the kinetic energy at a later time, or the rate of acceleration.
physics
What kind of length unit is "hm"?
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