một vật dao động điều hoà với chiều dài quỹ đạo 20cm. quãng đường dài nhất vật đi được trong 1/6 chu kì là:

Abucket full of water weights 4 kg and water well is 10m deep. a girl draws water from the well. it takes the girl 3 minutes to draw a bucket full of water from the well. what is the power of the girl?

Madison lives near the ocean. she’s formed a hypothesis that increased concentrations of salt in the air speeds the corrosion of certain metals. if madison plans to test this hypothesis, she will have to deal with the following variables in her experiment: dependent variable: independent variable: one possible confounding variable:

Aproton is shot from the negative disk toward the positive disk. what launch speed must the proton have to just barely reach the positive disk?