It is thought that stars form with an initial mass function dN dM x M235AM235 where...
It is thought that stars form with an initial mass function dN dM x M235AM235 where A is a constant of proportionality to be determined. Stars are born in the range from 0.08 to 120 Mo (a) Above/below what stellar mass do 50% of the total number of stars form? (b) Stars above what mass are responsible for producing 10% of the total stellar mass? (c) Main sequence stars have a power law relation between mass and luminosity, L x...
It is thought that stars form with an initial mass function dN/dM ox M2.5 AM-2.35 where A is a constant of proportionality to be determined. Stars are born in the range from 0.08 to 120 Mo (a) Above/below what stellar mass do 50% of the total number of stars form? (b) Stars above what mass are responsible for producing 10% of the total stellar mass? (c) Main sequence stars have a power law relation between mass and luminosity, L x...
ty Lifetimes. Zero-age main sequence stars much less than 0.5Mo are the alternate form of "dark matter". Assume a brown dwarf's luminosity derives from gravitational contraction alone. Its mass is 0.05 Mo, and its luminosity is 3 x 10-3Lo. Such stars maintain a tight correlation between radus and mass given by R 9 x 10 (M/Mo)-1em. If we assume that its luminosity has been constart a) calculate a radiation temperature and wavelength to demonstrate these stellar objects as "dark". (b)...
Procedure: Materials: 1. apparatus 2. 2 pieces of metal track 3. plastic or metal ball 4. timer 5. meter stick 6. micrometer 7. 2 photogates Assemble your ramp as shown in Figure (1) in the next page. Then set up photogates in location 2 and 3. Measure the diameter (in m) of the metal balls (you will need it for speed calculations). Then, measure the weight (mass) of the ball (in kg). To have a better measurement of the time,...
1. Which of the following are the sites within the human body where carbon dioxide and oxygen are exchanged? A. Alveoli B. Arteries C. Synapses D. Venules 2. Which of the following describes the most important reason for repeating an experimental investigation? A. To verify the validity of the original findings B. To expand upon the original investigation C. To manipulate the independent variable D. To attempt to disprove the hypothesis 3. Lithium has an atomic number of 3 and...