You're still traveling down the highway at 25 m/s when the ambulance returns, this time approaching you from the front at the same 45 m/s. The
temperature hasn't changed either. What is the difference in frequency
you hear this time as the ambulance approaches and then passes you?

a small object of mass 3.66 g and charge -17.6 µc is suspended motionless above the ground when immersed in a uniform electric field perpendicular to the ground. what are the magnitude and direction of the electric field?

32: from largest to smallest, this hierarchy includes eons, eras, periods, epochs, and ages.

33: answer is c

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