dia

why is looking through a powerful telescope like looking back through time?

why we don't see comets until they are mear the sun?

You overindulged on a delicious dessert, so you plan to work off the extra calories at the gym. To accomplish this, you decide to do a series of arm raises holding a 5.5kg weight in one hand. The distance from your elbow to the weight is 36cm , and in eac...