Physics & Math Practice Week 2
Doppler Shift: = , with = and = 3108 /
lab
1. You measure the wavelength of a line from a distant galaxy to be 574nm, but you know that in the lab
that line is measured from a source that isnt moving to be 570nm.
a) What is

Physics & Math Practice Week 5
Energy and Mass: E = m c2 (where c = 3x108 m/s)
1. What is the energy contained in the mass of a baseball with m = 0.142 kg?
2. The largest nuclear weapon ever built, Tsar Bomba, released an energy of E = 2.1 1017 J. How muc

Physics & Math Practice Week 1
Scientific notation practice: http:/www.edinformatics.com/math_science/scinot6.htm
Just hit New Problem, and then Check Answer. Do at least a few!
Scientific Notation
1. Evaluate: a) (6.3108 )x(0.00037) b) 7.1105 + 8.2104 c)

Constants
c = 3 x 108 m/s = 300,000,000 m/s
= 5.67 x 10-8 Wm-2K-4
= 3.14
MSun = 1.99 x 1030 kg
h = 6.625 x 10-34 Js
LSun = 3.90 x 1026 W
H0 75 km/s/Mpc
G = 6.67 x 10-11 Nm2/kg2
Conversions
1 nm = 1 x 10-9 m
1 ly = 9.46 x 1015 m
1 m = 1 x 10-6 m
1 Mpc =