45. A thin light string is wrapped around the rim of a 4.00 kg solid uniform disk of diameter 30.0 cm. A person pulls on the string with a constant force of 100.0 N. The disk is horizontal and rotates about a vertical axis passing through its center. Find the angular acceleration of the disk and its linear acceleration at its rim. Indicate the forces acting on the disk!

Ais useful when you need a simple machine to you separate two things. a. lever b. screw c. pulley d. wedge

Ineed this now one scientist feels that the changes in global climatic patterns may be good for the health of the biosphere. another scientist feels that sharp changes in climatic patterns could result in the extinction of the biosphere. which of these is the most likely reason the two scientists gave conflicting opinions on the impact of changes in the global climatic pattern? they do not have enough knowledge on the topic. they did not discuss the issue among themselves. they believe conflicting opinion strengthens science. they study different areas of science and have different scientific focuses.

Aswimming pool whose volume is 10 comma 000 gal contains water that is 0.01% chlorine. starting at tequals0, city water containing 0.003% chlorine is pumped into the pool at a rate of 5 gal/min. the pool water flows out at the same rate. what is the percentage of chlorine in the pool after 1 hour? when will the pool water be 0.006% chlorine?