Find the center of mass (in cm) of a one-meter long rod, made of 50 cm of iron (density 7.86 g/cm3) and 50 cm of gold (density 19.3 g/cm3). (Assume the origin is at the midpoint of the rod, with the positive direction towards the part of the rod made of gold. Indicate the direction with the sign of your answer.)

Could someone . i have tried to solve myself but my calculation is off

Choose the most likely outcome of this scenario: jen decided to go bike riding without a helmet. while no one is around during her ride, she is thrown from her bike when her wheel goes into a pothole. she is not injured, but she is terrified to get back on her bike. what happens next? a. her physical health is affected even though she wasn't hurt. b. her mental and emotional health are affected because she is afraid to get back on her bike. c. her social health is affected because she is worried her friends saw the fall. d. her overall health is not affected at all by her fall.

Arowboat passenger uses an oar to push the boat off the dock by exerting a force of 40n for 3.0s. what impulse acts on the boat.