Which best describes how the current scientific model of the atom was developed? (2 points) a
The model was the result of hundreds of years of experiments.

b
Recent experiments invalidated most of the work of the last 200 years.

c
Most of the discoveries from the early 1900s were shown to be incorrect.

d
New experiments were ignored if they did not agree with the accepted theory.

This question determines if i get a christmas or not because ive been failing and need a 85 and up on this quiz please help me.

Explain how the energy of rubber ball is tranforned as it roll down a ramp. give evidence that the energy of the og the ball remains the same at all points on the ramp

Use the information presented in the graph to answer the questions. which segments show acceleration? which segment indicates that the object is slowing down? what is the velocity of segment b? what is the acceleration of segment b?

Electric field of the earth. the earth has a net electric charge that causes a field at points near its surface equal to 150 n> c and directed in toward the center of the earth. (a) what magnitude and sign of charge would a 60-kg human have to acquire to overcome his or her weight by the force exerted by the earth’s electric field? (b) what would be the force of repulsion between two people each with the charge calculated in part (a) and separated by a distance of 100 m? is use of the earth’s electric field a feasible means of flight? why or why not?