In an effort to be the star of the halftime show, a majorette twirls an unusual baton made up of four spheres fasted to the ends of very light rods. Each rod is 1.0 m long and each
mass is 0.35 kg. Find the moment of inertia of the baton about an axis perpendicular to
the page and passing through the point where the rods cross.

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.

Which statement is true? a. kepler's laws apply only to the motion of earth. b. kepler's laws can be used to predict eclipses. c. kepler's laws are true for a central force that is directly proportional to distance. d. kepler's laws can be deduced from newton's laws of motion and gravity.

What is a neurotransmitter involved in mood reward, addiction, and motor behaviors?