A 1000.0 KG car racing on a flat track travels at 22.0 0M/S around a curve with a 55.6 0M radius find the force needed to keep the car traveling in a circle

The answer would be a) -80of

Newton's first law describes something special that results from the sum of all the external forces (including gravity) on an object. 

C. the electric current passes from the slip rings, through the brushes, and to the collection device.

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.