Calculate the electrical force (in Newtons) exerted between a 22-gram balloon with a charge of -2.6 µC and a wool sweater with a charge of +3.8 µC when they are held up with a separation distance is 0.25 m. The balloon is released; what acceleration does the balloon experience immediately upon release? The answer to the first part is 0.158 N, what is the second part?

Would corn syrup, molasses, or pancake syrup make a good lubricant in a car engine? explain your answer.

Sawyer is studying diffraction. he draws a diagram of a plane wave to show how light waves travel. which best describes sawyer’s error? the wave fronts should be perpendicular to the direction in which the waves move. the arrow showing the direction of movement of the waves should be pointing to the left. the arrow showing the direction of movement of the waves should be pointing downward. the wave fronts should be both parallel and perpendicular to the direction in which the waves move.

Awater slide of length l has a vertical drop of h. abby's mass is m. an average friction force of magnitude f opposes her motion. she starts down the slide at initial speed vi. use work-energy ideas to develop an expression for her speed at the bottom of the slide. then evaluate your result using unit analysis and limiting case analysis. express your answer in terms of the variables h, m, l, vi, f and appropriate constants. vf v f