A swimmer does 3,560 J of work in 55 s. What is the swimmer’s power output? Round your answer to two significant figures.

Which of the following represents an upside-down image?

Which of the following are not typically included in the periodic table? a. atomic mass b. element symbol c. isotopes d. number of electrons

Karen is running forward at a speed of 9 m/s. she tosses her sweaty headband backward at a speed of 20 m/s. the speed of the headband, to the nearest whole number relative to a stationary observer watching karen