If a marble took 1.63 seconds to go the first 50cm's, and 1.89 seconds to go the second 50cm's, and then 2.69 seconds to go the whole 100cm's, what was the average velocity and acceleration for the marble? Extra info: The table was tilted 20 degrees upwards

Please answer an real answer and not a bunch of random words or letters, or I will report you. Thank you! <3

Im not from america so could you explain what route 70 is? how much km or miles does it have? am i supposed to know ,from this text,what the s(road) is? how many km or miles it has?

Answer;

hot magma rises and pushes up toward the lithosphere, and as it cools it cycles back down toward the core to be heated again.

explanation; convection currents are the circular pathways taken by a fluid that enhances heat transfer by the process known as convection which occurs in fluids.convection currents transfer heat from one place to another by mass motion of a fluid. earth mantle is in a semi-liquid state and behaves like any other fluid, rising up from the bottom of the mantle after becoming hotter and less dense from heat of the earth's core, as the rock loses heat into the earth's crust it becomes cooler and more dense, then sinking back down to the core, then repeating the cycle.