A5000 ω resistor, an uncharged 300.0 μf capacitor are connected to an unknown battery. a) what is the time constant of this circuit? b) how long will it take for the capacitor to be 75% charged?

An ambulance emits a frequency of 450 hz from its siren. what frequency is heard by a man as the ambulance moves toward him? less than 450 hz more than 450 hz 450 hz 0 hz

Which is not true about oxygen-17 and oxygen-18?

Cathy is pedaling down a steep hill on her bicycle and wants to be able to coast up the next hill, which is 25 meters high, without pedaling. cathy and her bicycle have a mass of 75 kg. assuming her bicycle is 100% efficient, what would her speed have to be?