Problem for the extra credit: a telescope consists of a single pos- itive lens of diameter 1 m and focal length 20 m and a ccd camera with 2048 x 2048 square pixels with 9 um big pixels, placed in the focus of the lens. tele- scope is observing a binary star with two components, separated by 3 x 108 km, 5 light-years away. what is the angular resolution of this telescope? can the telescope see these two stars separated? (i. e. can it 'resolve them)? if yes, what is the distance between the stars on the ccd image (in pixels)? how big are the images of the stars on the ccd (in pixels)? what is the 'field of view of the camera? (the angular span it can cover, so to speak). assume the telescope observes at the wavelength 500 nm.

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.

Did the proton move into a region of higher potential or lower potential? did the proton move into a region of higher potential or lower potential? because the proton is a negative charge and it accelerates as it travels, it must be moving from a region of higher potential to a region of lower potential. because the proton is a negative charge and it accelerates as it travels, it must be moving from a region of lower potential to a region of higher potential. because the proton is a positive charge and it slows down as it travels, it must be moving from a region of higher potential to a region of lower potential. because the proton is a positive charge and it slows down as it travels, it must be moving from a region of lower potential to a region of higher potential. request answerpart bwhat was the potential difference that stopped the proton? express your answer with the appropriate units.î”v î” v = nothingnothingrequest answerpart cwhat was the initial kinetic energy of the proton, in electron volts? express your answer in electron volts. ki k i = nothing ev request answerprovide feedback

Which diagram correctly demonstrates the various forces acting on a ball moving horizontally with some speed?