The scientific method of determining the age of the solar system
a. uses the detailed record of impacts on the moon to determine the age of the solar system.
b. shows that the age of the solar system is nearly 14 billion years.
c. uses the current surface temperature of the sun and the rate at which this temperature is decreasing.
d. uses measurements of the proportions of various isotopes in meteorites.

Two vectors are shown. which statement best compares the vectors? vector x has greater magnitude than vector y. vector y has greater magnitude than vector x. the vectors have the same displacement. the vectors have the same direction.

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)

Where do magnetic lines of force enter earth?