4. One day Ali decided to weigh himself in an elevator on a bathroom
scale calibrated in newtons. He did this while the elevator was
stopped and again while it was moving. His mass is 80 kg
the scale read 784 N while the elevator was stationary. Next he
weighed himself while the elevator moved upwards at a constant
speed of 2 m/s. What was his weight at this time?
A. 624 N
B. 944 N
C. 784 N
D. 160 N

This question is worth 54 points ! rock falls from a ledge to the ground what energy conversion occurs during this process a potential to kinetic b kinetic to potential c thermal to mechanical d chemical to mechanical

Global warming will produce rising sea levels partly due to melting ice caps but also due to the expansion of water as average ocean temperatures rise. to get some idea of the size of this effect, calculate the change in length of a column of water 1.00 km high for a temperature increase of 1.00ºc. note that this calculation is only approximate because ocean warming is not uniform with depth. (answer in ×10^{-3} −3 m)

Calculate the volume of this regular solid. what is the volume of the cone? round your answer to the nearest hundredth