Some massive stars only live a few million years
Indicate whether the statement is true or false
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A resistor with a resistance of 360 ? is in a series circuit with a capacitor of capacitance 7.3 × 10-6 F
What capacitance must be placed in parallel with the original capacitance to change the capacitive time constant of the combination to three times its original value?
What happens to the atomic number (Z) and the mass number (A) when a nucleus emits an alpha particle?
a. Z increases by 1; A is unchanged. b. Z is unchanged; A is unchanged. c. Z decreases by 2; A decreases by 4. d. Z decreases by 1; A is unchanged.
Suppose that you measure the parallax angle for a particular star to be 0.1 arcseconds. What is the distance to this star? (Hint: A star at a distance of 3.26 light-years has a parallax angle of 1.0 arcseconds.)
A) 0.1 light-years B) 0.326 light-years C) 10 light-years D) 32.6 light-years E) 3.26 light-years
The pitch of a guitar relates to the string's
A) length. B) tension. C) mass. D) all the above E) none of the above