Aspacecraft in the shape of a long cylinder has a length of 100 m, and its mass with occupants is 1 470 kg. it has strayed too close to a black hole having a mass 100 times that of the sun. the nose of the spacecraft points toward the black hole, and the distance between the nose and the center of the black hole is 10.0 km. what is the difference in the gravitational fields acting on the occupants in the nose of the ship and on those in the rear of the ship, farthest from the black hole? this difference in acceleration grows rapidly as the ship approaches the black hole. it puts the body of the ship under extreme tension and eventually tears it apart.

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)

Selma made a diagram to compare convection and radiation. which label belongs in the area marked x? must involve temperature differences between substances or objects only occurs when molecules are in direct contact involves the movement of fluids based on density differences can occur where there is little or no matter

Abowling ball rolling down the lane toward the pins has gravitational potential energy. a. no b. a lot of c. a little