Vector a⃗ has a magnitude of 3.00 and is directed parallel to the negative y-axis and vector b⃗ has a magnitude of 3.00 and is directed parallel to the positive y-axis. determine the magnitude and direction angle (as measured counterclockwise from the positive x-axis) of vector c⃗ , if c⃗ =a⃗ −b⃗ .

c = 6.00; θ = 270˚
c = 3.00; θ = 270˚
c = 6.00; θ = 90˚
c = 3.00; θ = 90˚

Uppose we consider the system of the three capacitors as a single "equivalent" capacitor. given the charges of the three individual capacitors calculated in the previous part, find the total charge qtot for this equivalent capacitor. express your answer in terms of v and c.

Awelder using a tank of volume 7.50×10^-2 m^3 fills it with oxygen (with a molar mass of 32.0 g/mol ) at a gauge pressure of 3.30×10^5 pa and temperature of 37.1 ∘c. the tank has a small leak, and in time some of the oxygen leaks out. on a day when the temperature is 23.1 ∘c, the gauge pressure of the oxygen in the tank is 2.00×10^5 pa . a) find the initial mass of oxygen. b) find the mass of oxygen that has leaked out.

Which planets are visible without a telescope