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.

Physics make-up packetname_cle14. an observer hears a sound with a frequency of 400 hz. if the speed of sound is 340 m/s, what is the wavelength of the sound? a. 0.85 mb. 1.2 mc. 2.75 m13.6 m15. as sound travels from steel into air, its speed decreases. if the frequency of the wavedoesn't change, what happens to its wavelength? a. it increases(b) it decreasesc. it remains the samed. there is not enough information given

The softest and hardest minerals are: softest hardest

Urgent pls a. coal consumption levels off and remains flat. b. petroleum, natural gas, and renewables show an increase in consumption c. more nonrenewable resources continued to be consumed than renewable. d. there is little projected increase in nuclear energy use. e. carbon dioxide emissions are projected to decline as we approach 2040. global energy consumption is defined as the total energy used by an individual or organizations from around the world. use the graph above to analyze the projected energy consumption from now until 2040. which statements in the prompt apply? a) a, b, d b) b, c, d c) a, c, d d) a, b, c, d