A speed-time graph is shown below: 5
Speed vs. Time
(s/15) poods >
...do
6
8
Time (seconds)
How far did the object travel by the end of eight seconds, according to the graph above?
O It traveled 12 centimeters
O It traveled 16 centimeters.
It traveled 24 centimeters
O it traveled 32 centimeters.

Positrons are spontaneously emitted from the nuclei of

Suppose astronomers built a 140-meter telescope. how much greater would its light-collecting area be than that of the 10-meter keck telescope? express your answer using two sign

Consider each of the electric- and magnetic-field orientations given next. in each case, what is the direction of propagation of the wave? a)\vec ein the +xdirection,\vec bin the +ydirection. choose+ x direction- x direction+ y direction- y direction+ z direction- z direction b)\vec ein the -y direction,\vec bin the +x choose+ x direction- x direction+ y direction- y direction+ z direction- z direction c)\vec ein the +z direction,\vec bin the -x direction. choose+ x direction- x direction+ y direction- y direction+ z direction- z direction d)\vec ein the +y direction,\vec bin the -z direction. choose+ x direction- x direction+ y direction- y direction+ z direction- z direction