In a free market, prices lead to an efficient allocation of resources. In other words,

A) consumers can buy unlimited amounts of any good they like at a price of their choice

B) resources are used in the most productive way, based on the needs of consumers and producers

C) the government decides who controls natural resources

D) people who own resources are unable to bargain with people who wish to buy resources

What color of light must blue light mix with to create white light? a. yellow b. white c. blue d. green

The ultracentrifuge is an important tool for separating and analyzing proteins. because of the enormous centripetal accelerations, the centrifuge must be carefully balanced, with each sample matched by a sample of identical mass on the opposite side. any difference in the masses of opposing samples creates a net force on the shaft of the rotor, potentially leading to a catastrophic failure of the apparatus. suppose a scientist makes a slight error in sample preparation and one sample has a mass 10 mg larger than the opposing sample. if the samples are 12 cm from the axis of the rotor and the ultracentrifuge spins at 70,000 rpm, what is the magnitude of the net force on the rotor due to the unbalanced samples? ( be thorough on your answer)

Two forces produce equal torques on a door about the door hinge. the first force is applied at the midpoint of the door; the second force is applied at the doorknob. both forces are applied perpendicular to the door. which force has a greater magnitude?