Our sun is 2.3 × 104 (light years) from the center of our milky way galaxy and is moving in a circle around that center at a speed of 250 / one light year is the distance like travels in one year. if the speed of light is 2.998 × 108 m/ how long does it take the sun to make one revolution about the galactic center? b) how many revolutions has the sun completed since it was formed about 4.5 × 109 years ago? take one year as 365 days for your calculations.

The great sandini is a 60.0-kg circus performer who is shot from a cannon (actually a spring gun). you don’t find many men of his caliber, so you him design a new gun. this new gun has a very large spring with a very small mass and a force constant of 1100 n/m that he will compress with a force of 4400 n. the inside of the gun barrel is coated with teflon, so the average friction force will be only 40.0 n during the 4.00 m he moves in the barrel. at what speed will he emerge from the end of the barrel, 2.50 m above his initial rest position?

Earth's atmosphere is composed of mostly two gases. name the two gases that make up the majority of the atmosphere and use the pie chart to tell the percentages of each.

Using a caesar cypher with an offset of three characters (a -> d, b -> e, z -> c), what would be the correct cypher text for the plain text "attack at dawn"?