Marbles rolling down The ramp and horizontally of your desk and assistant land 70 cm from the base of your desk. Your desk and 73 cm high. If you pull your desk over to the window of your second story room and "launch" marbles to the ground (6.68 m  below the desktop) how far into the yard with marbles land?

6.39 meters

Explanation:

t=sqrt(2d/g)

convert cm to m t=sqrt(2*0.73/9.81) t=0.1488 seconds

v=d/t v=0.70/0.1488 v=4.7m/s

Now, the new time out the window is t=sqrt(2*6.68/9.81) t=1.36 seconds

d=vt d=(4.7)*(1.36) d=6.39 meters!

28. evolution

29. environment, survive, offspring  

explanation:

part 1: which substance has a higher solubility?

a

smallest amount left undissolved atall temps in table shown most has dissolved high sol'by