Portable scissor lifts come in handy for gearheads who like to work on their cars. as seen below, my beloved infinity q45 is up for repairs. knowing the vehicle mass m = m=1840 kg and lift dimension a = a=60 cm, determine the cylinder force magnitude f a b fab in n in o n e one of the t h r e e three pistons a b ab when θ = θ= 35 o o. assume the mass of the lift and friction are negligible.

Agroup of students is studying convection currents. they fill two identical balloons with the same amount of helium. one balloon is placed in a freezer and the other in an area with warm air. after 10 minutes, the balloons are released from a height of 1 meter. which of the following do the students most likely observe? question 2 options: the balloons rise at the same rate. both balloons are the same size. the ballons both rise. the cold ballon is larger than the warm balloon. the cold balloon expands and rises. the warm balloon shrinks and sinks. the warm balloon expands and rises. the cold balloon shrinks and sinks.