A crater on the near-side of the Moon subtends an angle of 1.15 arcmin as seen by someone standing on the Earth. What is the diameter of the crater in km?

If an electric circuit is not grounded it is best to reach out and touch it to provide the ground a.true or b.false

How did the germans define who was jewish?

The radioactive isotope of lead, pb-209, decays at a rate proportional to the amount present at time t and has a half-life of 3.3 hours. if 1 gram of this isotope is present initially, how long will it take for 80% of the lead to decay? (round your answer to two decimal places.)