ne problem for humans living in outer space is that they are apparently weightless. One way around this problem is to design a space station that spins about its center at a constant rate. This creates "artificial gravity" at the outside rim of the station. You may want to review (Page) . For related problemsolving tips and strategies, you may want to view a Video Tutor Solution of Force in uniform circular motion. Part A If the diameter of the space station is 830 mm , how many revolutions per minute are needed for the "artificial gravity" acceleration to be 9.80m/s29.80m/s2?

a=d/t

a="triangle"v/t

explanation:

a = acceleration

the answer is the index of refraction of the second medium is higher. i just took the test.

answer: the potential energy decreases from 379 j to 243 j

explanation:

for the law of conservation of energy, the total energy in a system must be conserved. the total energy of the system is given by the sum of kinetic (k) and potential (u) energy:

e = k + u

the total energy is e=675 j, and this does not change.

initially, the kinetic energy is k=296 j, so the potential energy is

at the end, the kinetic energy is k=432 j, so the potential energy is

so, we see that the potential energy has decreased from 379 j to 243 j.