. A 750 kg boulder is raised from a quarry 125 m deep by a long, uniform chain having a mass of 575 kg. The chain can support a maximum tension no greater than 2.5 times its weight without breaking. How long does it take for the boulder to be lifted out at maximum acceleration if it started from rest?

15.8 s

17.3 s

10.0 s

20.0 s

How many moles of sulfur dioxide are produced when 4.38 moles of oxygen completely react with iron (iv) sulfide

Astudent states that 9.0 g of baking soda will form an unsaturated solution in 100 g of water. what do you need to know to decide whether this statement is correct? a. the temperature of the water and the molar mass of baking soda b. the percent by volume of the solution and the solubility of baking soda c. the temperature of the water and the solubility of baking soda at that temperature

What causes the appearance of lines in a emission spectrum