The drawing shows two boxes resting on frictionless ramps. one box is relatively light and sits on a steep ramp. the other box is heavier and rests on a ramp that is less steep. the boxes are released from rest at a and allowed to slide down the ramps. the two boxes have masses of 8 and 49 kg. if a and b are 4.5 and 1.5 m, respectively, above the ground, determine the speed of (a) the lighter box and (b) the heavier box when each reaches b. (c) what is the ratio of the kinetic energy of the heavier box to that of the lighter box at b?

If a spring has a k value of 100 newtons per meter and it is stretched 0.50 meters, what is the restoring force of the spring?

Which of the following are considered noble gases? a. bromine b. neon c. argon d. chlorine

Calculate the ratio of h+ ions to oh– ions at a ph = 6. find the concentration of h+ ions to oh– ions listed in table b of your student guide. then divide the h+ concentration by the oh– concentration. record this calculated ratio in table a of your student guide. compare your approximated and calculated ratios of h+ ions to oh– ions at a ph = 6. are they the same? why or why not? record your explanation in table a. what is the concentration of h+ ions at a ph = 6? mol/l what is the concentration of oh– ions at a ph = 6? mol/l what is the ratio of h+ ions to oh– ions at a ph = 6? : 1