I need help with all of these. An astronaut's weights herself on a scale on Earth. She finds that her weight, including her 180 1b space suit, is 315 lb. She then travels to the surface of the moon. Use the weight of the astronaut in her suit for all calculations.

8. What is the astronaut's weight including the space suit on Earth, in N?

9. What is the astronaut's mass on Earth (in Kg)?

10. What is the astronaut's mass on the moon (in kg)?

11. What is the astronaut's weight on the moon, in N?

12. What is the astronaut's weight on the moon, in pounds?

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)