The Big Bang

If a galaxy is 153 Mpc away from us, how fast do we expect it to be moving and in what direction?

tran (mmt2449) – Homework 06 – yao – (56695) 1 This print-out should have 26 questions. Multiple-choice questions may continue on keywords: the next column or page – ﬁnd all choices before answering. 002 10.0 points The angular velocity in rad/s of the minute 001 10.0 points hand of a watch is: The speed of a moving bullet can be deter- mined by allowing the bullet to pass through 1. π/60 two rotating paper disks mounted a distance 73 cm apart on the same axle. From the 2. π/1800 correct angular displacement 27.4◦ of the two bul- let holes in the disks and the rotational speed 3. 1800/π 872 rev/min of the disks, we can determine the speed of the bullet. 4. 60/π ◦ v 27.4 5. π Explanation: The minute hand of a watch completes one revolution in one hour. So, we have 872 rev/min 1 revolution radians 1 hr ω = 2π 73 cm 1 hr revolution 3600 s What is the speed of the bullet π