You buy a 75 W lightbulb in Europe, where electricity is delivered to homes at 240 V (meaning that the lightbulb is designed to deliver 75 W at 240 V). If you use this European lightbulb in the United States at 120 V (assuming its resistance does not change), how bright will it be relative to a U. S. lightbulb designed to deliver 75 W at 120 V. Hint: Assume that brightness is roughly proportional to power consumed.

Tafari worked one summer on a ship that set weather buoys in the ocean. he watched how one of the buoys moved in the water. describe which parts of the wave would cause the buoy to bob up and down. which wave property determined how fast the buoys bobbed in the water? he observed that when the wind blew harder, the ocean waves were larger, and the buoys moved away from the ship. what effect, if any, did the waves have on how far the buoys moved? explain your answer.

Achemistry student needs of 40ml diethylamine for an experiment. by consulting the crc handbook of chemistry and physics, the student discovers that the density of diethylamine is 0.7 . calculate the mass of diethylamine the student should weigh out. round your answer to significant digits.

Identify the forces that contribute to the centripetal force on the object in each of the following examples: a. a bicyclist moving around a flat, circular track b. a bicycle moving around a flat, circular track c. a racecar turning a corner on a steeply banked curve