stamamen-
1) ?
2) The balloon will move forward. Since the denser air will move back, it will move the less dense helium balloon forward.
3)
a) Turn both hourglasses over.
b) When the four-minute glass is emptied (4 minutes elapsed, three minutes left in the 7-minute timer) turn it over.
c) When the seven-minute timer is emptied (seven minutes elapsed, one minute left in the four minute timer), turn the seven minute timer over.
d) When the four minute timer is emptied (eight minutes elapsed, six minutes left on the seven minute timer), turn the seven minute timer over, and one minute’s worth of sand will now run out.
4) 9 pages with 1 digit for a total of nine. 90 pages with two digits for a total of 180. 1095 – 189 = 906. 906 / 3 = 302. 302 + 90 + 9 = 401.
5) answered by “blinky”
6)
a) If there is no liquid in the blender: Is there enough clearance to lie down below the blades? Is there clearance to stand between the blade tips and the blender wall?
b) If there is liquid in the blender: Is it high enough that he can climb over the top? Hide in the top? Can he pop the blade off of the base? Can he bend the blades? Can he hold the hub of the blade while it spins? Can he rock the blender so it falls over? Can he say Shema within sixty seconds?