2. an cupha particle is the nucleous of a helium atom, it has a mass of 6 64x16
k. and a charge q + 2 e = 3.2x10-19 c. compare the force of the
electric repulsion betolen alpha particles with the force of gravitat tonal
attraction between them.

What is the relationship between the direction of motion of the balloon and the wind currents

Hydroelectricity provides about 7 percent of the electricity generated in the united states. (a) explain how a hydroelectric power plant converts energy stored in water into electricity. (b) identify two factors that determine the amount of electricity that can be generated by an individual hydroelectricity power plant. (c) describe the two main types of land-based hydroelectric power plants. (d) describe two economic advantages and two environmental disadvantages of hydroelectricity.

How do the forces acting on a boat compare to the force acting on a plane ?