How long will it take a spacecraft travelling at 99% the speed of light (gamma = 7) to reach the star Sirius which is 8.6 light-years away according to people on Earth ? How long will it
take according to the crew of the ship?

Two 1.20-m nonconducting wires meet at a right angle. one segment carries + 2.50 µc of charge distributed uniformly along its length, and the other carries - 2.50 µc distributed uniformly along it, as shown in fig. 21.50. ( a. find the magnitude and direction of the electric field these wires produce at point p, which is 60.0 cm from each wire. ( b. if an electron is released at p, what are the magnitude and direction of the net force that these wires exert on it?

Anthropology is the study of the effects of disease on the body, while forensic anthropology studies the disease of crime a.) true b.) false

Describe the three ray tracing steps used to identify an image for the given situation.