An early major objection to the idea that the earth rotates on its axis was that it would have to turn so fast that people would be thrown off into space. Show the error in this logic by

calculating:

a. the speed of a 100 kg person standing at the equator. (The radius of the earth is

about 6400 km).

b. the net force necessary to keep the person in this motion.

c. how the normal force acting on the person compares to their weight.

d. From your answers to these questions, explain why people do not fly off into

space. What would happen to the size of the normal force if the earth spun faster?

This is the answer of your question

Sublimation- which change of state is shown in model

You need to be more specific.  i really don't know what a "motion map" is.you can draw a graph of an object's position, distance, displacement, speed,velocity, or acceleration versus time, or you can draw a graph of the object's x-position versus its y-position and not give any information about time at all.if the graph presents position or displacement against time,  then constant velocity is a straight line . . i.e. a line that has  constant slope.if the graph shows speed against time, then constant velocityis a horizontal piece of line.if the graph shows acceleration against time, then constant  velocity is a piece of line that lies on the x-axis . . it's value is zero. 

Hellosubatomic particles  are  particles  that are smaller than the atom. protons, neutrons, and electrons are the three mainsubatomic particles  found in an atom. protons have a positive (+)  charge. an easy way to remember this is to remember that both neutron and no  electrical charge  start with the letter "n."have a nice day