Two friends (A and B) have planned a meeting at 9 am at their office. Friend A reached the office at 9 am according to A's watch, while B reached the office at 8:55 am according to B's watch. Yet, when B reached the office, A's watch showed 9:05 am. A argues that B's watch was slow since he drove fast, and that his time of 9:05 am is correct. Are their arguments correct? What assumptions have they made? Discuss this scenario in terms of Einstein's special relativity. Remember to include the following information: Einstein's special relativity. Time dilation. Length contraction.

Acar drives toward the right over the top of a hill, as shown below. which arrow represents the centripetal acceleration? w x y z

Assume that two of the electrons at the negative terminal have attached themselves to a nearby neutral atom. there is now a negative ion with a charge -2e at this terminal. what are the electric potential and electric potential energy of the negative ion relative to the electron? the electric potential and the electric potential energy are both twice as much. the electric potential is twice as much and the electric potential energy is the same. the electric potential is the same and the electric potential energy is twice as much. the electric potential and the electric potential energy are both the same. the electric potential is the same and the electric potential energy is increased by the mass ratio of the oxygen ion to the electron. the electric potential is twice as much and the electric potential energy is increased by the mass ratio of the oxygen ion to the electron.

Each line (unit) on the horizontal axis represents: 5 years 10 years 20 years all of the above