Which element has an atomic number of 9 and an atomic mass of 19? A. boron
B. carbon
C. sulfur
D. fluorine

The built in flash in a compact camera is usally capable of giving correct exsposure for distance up to how many meters?

Wo small variable-thrust jets are actuated to keep the spacecraft angular velocity about the z-axis constant at ? 0 = 1.16 rad/s as the two telescoping booms are extended from r1 = 1.18 m to r2 = 4.69 m at a constant rate over a period of 124 seconds. the small 19-kg experiment modules at the ends of the booms may be treated as particles, and the mass of the rigid booms is negligible. determine the necessary thrust t for each jet as a function of time where t = 0 is the time when the telescoping action is begun. after you have the general expression for t, answer the questions. show work.

Which system of units is used by only a small number of countries in the world, including the u.s.