Very high-speed ultracentrifuges are useful devices to sediment materials quickly or for separating materials. An ultracentrifuge spins a small tube in a circle of radius 10.0 cm at 6.00 x 10^4 rpm. Calculate the force exerted on an object that has a mass of 3.00 g rotating in the centrifuge.

If it takes a planet 2.8 x 10^8 s to orbit a star with a mass of 6.2 x 10^30 kg what is the average distance between the planet and the star

You win the lottery and decide to impress your friends by exhibiting a million-dollar cube of gold. at the time, gold is selling for $ 426.60 per troy ounce, and 1.0000 troy ounce equals 31.1035 g. -how tall would your million-dollar cube be? en cm

Which fact supports the conclusion that there will be fewer farm managers in the future? a) a farmer manager’s duties vary by the type of farm. b) farm technology is replacing some administrative jobs c) farm managers often need experience but not education. d) administrative duties include budgeting and training staff.