Which observation provides evidence of the force that the balloons exert on each other over a distance because of their charge?The amount of rubbing with the wool cloth can change the amount of charge. Both Balloon 1 and Balloon 2 are pulled downward by the force of gravity. Moving Balloon 1 can make Balloon 2 move without the balloons touching. The charge on the balloons gets weaker over time until there is no charge.

The passage that directs air to the lungs is called a. diaphragm. b. larynx. c. bronchi. d. pharynx.

Alinearly polarized electromagnetic wave has an average intensity of 196 w/m^2. this wave is directed towards two ideal polarizers (in real polarizers, transmission is also effected by reflection and absorption). polarizer a is oriented with its transmission axis at an angle of θ_1=20.8∘ with the incident electric field. polarizer b has its axis at an angle of θ_2=63.0∘ with the incident electric field. what is the average intensity of the wave after it passes through polarizer a? what is the average intensity of the wave after it passes through polarizer b? suppose that the two polarizers a and b are interchanged. what would the average intensity be after passing through both polarizers?

Within a pendulum, as potential energy decreases, energy increases. a. heat b. kinetic c. frictional d. gravitational