1. According to Figure 1, for any submersion time after 0 days, what is the order of the 4 deicers, from the
deicar that produced the greatest average percent
change in cylinder leagth to the deicer that produced
the least average percent change in cylinder length?
A. Ca(OH), NaCl, CaCl, MgCl,
B. Ca(OH. NaCl. Mach.. CCL
C. MzCb, CaCl, NaCl, CaOH,
D. MgClNaCl, CaCl, Ca(OH),

Why is the use of carbon-14 limited

3. a worker pushes a 30.5 kg polished stone along a polished table with a force on bonin a straight line for 5.20 s after starting from rest. there is no friction between thestone and the table. at the end of the table. the stone is hooked to a cable with a lengthof 62.0 cm to rotate it to a rough table to store until they can be picked up. the roughtable has a coefficient of static friction 0.702 with the polished stone. remember that 8= 9.80 m/s2a) what is the speed of the stone when it is hooked to the cable? b) what is the tension in the cable while the stone is rotating? (there is still nofriction)c) how much force is needed to make the stone begin sliding from rest on therough table? ius = 0.70262.0 cm30.5 kg20.5 kg6= 0

Point charges q1=+2.00μc and q2=−2.00μc are placed at adjacent corners of a square for which the length of each side is 1.50 cm . point a is at the center of the square, and point b is at the empty corner closest to q2. take the electric potential to be zero at a distance far from both charges. part a what is the electric potential at point a due to q1 and q2? express your answer with the appropriate units.