given that the ksp for caf2 at 25°c is 3.9 × 10–11, will a precipitate form when 0.10 l of 2.3 × 10–4 m cacl2 is added to 0.50 l of 5.0 × 10–3 m naf? assume volumes are additive.

During takeoff, the sound intensity level of a jet engine is 170db at a distance of 34 m. what's the sound intensity level at a distance of 1.0 km?

Simple machines can a. increase force only b. decrease force only c. increase or decrease force

If a rock is thrown upward on the planet mars with a velocity of 12 m/s, its height (in meters) after t seconds is given by h = 12t − 1.86t2. (a) find the velocity of the rock after two seconds. m/s (b) find the velocity of the rock when t = a. 12−3.72a m/s (c) when will the rock hit the surface? (round your answer to one decimal place.) t = s (d) with what velocity will the rock hit the surface? m/s