Two blocks of mass 3.50 kg and 8.00 kg are connected by a massless string that passes over a frictionless pulley (fig. p5.49). the inclines are frictionless. find (a) the magnitude of the acceleration of each block and (b) the tension in the string.

An insurance company wants to know if the average speed at which men drive cars is higher than that of women drivers. the company took a random sample of 27 cars driven by men on a highway and found the mean speed to be 72 miles per hour with a standard deviation of 2.2 miles per hour. another sample of 18 cars driven by women on the same highway gave a mean speed of 68 miles per hour with a standard deviation of 2.5 miles per hour. assume that the speeds at which all men and all women drive cars on this highway are both approximately normally distributed with unknown and unequal population standard deviations.

We have a colorless transparent liquid. it looks like water. we seperated it into a solid and a liquid by evaporration and condention was this a chemichal or a physical seperation a. chemical seperation b. physical seperation

How to tell if a molecule is polar or nonpolar with electronegativity