Consider a helium balloon with volume 2.1 l.
part (a) calculate the buoyant force on the balloon, in newtons. use 1.29 kg/m^3 for the density of air.
part (b) given the mass of the rubber in the balloon is 1.3 g, what will be the net force, in newtons, in the vertical direction (taking up as positive) on the balloon if it is released? neglect the volume of the rubber, and use 0.18 x 10^-3 g/cm^3 for the density of helium.

Unpolarized light of intensity so passes through two sheets of polarizing material whose transmission axes make an angle of 60∘ with each other as shown in the figure. what is the intensity of the transmitted beam, st?

Anybody wanna ? (picture included? )

High schoolphysics 5+3 pts a neon light consists of a glass tube with metal wires at each end. when connected to a high-voltage source, the gas glows. if a fly lands on the glass tube, what will most likely happen? a) the fly will not feel a shock because the glass conducts any free electrons back into the gas. b) electrons will flow directly from the metal wires along the glass and shock the fly. c) the fly will not feel a shock because the glass insulates it from the electrons in the gas and the metal. d) electrons that are moving through the gas will be conducted through the glass and shock the fly.