A58 kg woman and a 70 kg man stand 18.0 m apart on frictionless ice. (a) how far from the man is their center of mass (cm)? 8.15625 correct: your answer is correct. m (b) if each holds one end of a rope, and the man pulls on the rope so that he moves 2.2 m, then how far from the woman will he be now? 13.6 incorrect: your answer is incorrect. m

when a device is used in a circuit in which the voltage is 81 v, the current flowing through the device is 3 a. what is the resistance of the device?

a. 27 ω

b. 40.5 a

c. 243 ω

d. 243 a

the correct answer is a. 27

i think its c if i'm wrong

find the surface area of the sphere to the nearest square unit. use a calculator.

a. 254 in.2

b. 64 in.2

c. 127 in.2

d. 1,018 in.2