4. The blades on a fan have a frequency of 15 Hz.
a) How many cycles do the blades complete in five minutes?
b) What is the period for the fan blades?
c) How long would it take for the fan blades to complete 100 revolutions?

A0.580-kg rock is tied to the end of a string and is swung in a circle with a radius of 0.500 meters. the velocity of the rock is 4.50 m/s. what is the centripetal force acting on the rock? 15.5 n 5.22 n 69.8 n 23.5 n

How would a small bar magnet be oriented when placed at position x?

Iron is a transition metal with multiple oxidation numbers. (answer the following) a. what is the iron (ii) ion? how does it differ from the iron (iii) ion? b. if iron were to bond with oxygen, predict the formula for each oxidation number of iron. c. how would each formula be named?