Which of these would best describe why the weight of an object on the sun would be more that the weight of the same object on any of the planets in our solar system? a) the pull of gravity by the sun is less than all of the other planets. b) an object's mass on the sun is less than anywhere in the solar system. c) the pull of gravity by the sun is greater than all of the other planets. d) an objects mass on the sun is greater than anywhere else in the solar

Which type of current is produced by a wire breaking magnetic field lines and changing the polarity? a. alternating b. direct c. straight d. alternating and direct

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.

Arod of some material 0.20 m long elongates 0.20 mm on heating from 21 to 120°c. determine the value of the linear coefficient of thermal expansion [in (degrees c)^-1] for this material.