The electrical impulse is as it passes through the av node

Moon effect. some people believe that the moon controls their activities. if the moon moves from being directly on the opposite side of earth from you to being directly overhead, by what percentage does (a) the moon's gravitational pull on you increase and (b) your weight (as measured on a scale) decrease? assume that the earth–moon (center-to-center) distance is 3.82 × 10^8 m, earth's radius is 6.37 × 10^6 m, moon's mass is 7.36 × 10^22 kg, and earth's mass is 5.98 × 10^24 kg.

Mechanical energy is when the amount of kinetic and potential energies added together remains the same. conserved created lost

Astudent pushes a 60-n block across the floor for a distance of 10 m. how much work was done to move the block