The overhead reach distances of adult females are normally distributed with a mean of 197.5 cm 197.5 cm and a standard deviation of 8.6 cm 8.6 cm. a. find the probability that an individual distance is greater than 207.50 207.50 cm. b. find the probability that the mean for 15 15 randomly selected distances is greater than 196.00 cm. 196.00 cm. c. why can the normal distribution be used in part (b), even though the sample size does not exceed 30?

Copper has free electrons per cubic meter. a 71.0-cm length of 12-gauge copper wire that is 2.05 mm in diameter carries 4.85 a of current. (a) how much time does it take for an electron to travel the length of the wire? (b) repeat part (a) for 6-gauge copper wire (diameter 4.12 mm) of the same length that carries the same current. (c) generally speaking, how does changing the diameter of a wire that carries a given amount of current affect the drift velocity of the electrons in the wire?

Is there a point between a 10 nc charge and a 20 nc charge at which the electric field is zero?

Heterogeneous mixture with larger particles that never settle is