An adventurous archaeologist crosses between two rock cliffs by slowly going hand-over-hand along a rope stretched between the cliffs. He stops to rest at the middle of the rope . The rope will break if the tension in it exceeds 2.75×104 {\rm N} , and our hero's mass is 81.6

what question you dont ask a question

explanation:

wavelength divides in half and speed stays the same.

answer: 2×10^-2kg

explanation: density= mass per volume

vol=mass/density

converting to s.i units we have;

3÷1000kg = 0.003

1.5÷100m = 0.15

0.003/0.15 = 0.02kg

distance = 150m

displ = root (50 ^2 + 100^2)

root(2500+10000)

root 125000