A sound of a bell emitting frequency at 750 hertz traveling against a steady air space of 20 meters per second. At what frequency of the sound would a motorist traveling ar 20 meters per second away from the bell hear?​

Select all the correct answers. which changes will increase the rate of reaction during combustion? decreasing the area of contact between the reactants adding more oxygen to the reaction removing heat from the reaction changing the reactants from solid form to powdered form lowering the exposure of the reactants to air

The force needed to overcome static friction is usually less than that needed to overcome kinetic friction. true or false?

)consider two positively charged particles, one of charge q0 (particle 0) fixed at the origin, and another of charge q1 (particle 1) fixed on the y-axis at (0,d1,0). what is the net force f⃗ on particle 0 due to particle 1?