duas cargas elétricas puntiformes e idênticas, de 3c cada, são espaçadas em 0,8m no vácuo. determine o módulo da força elétrica entre essa duas cargas.​

What happens to light waves from a star as the star moves away from earth?

Steam enters an adiabatic diffuser at 150 kpa and 1208c with a velocity of 550 m/s. determine the minimum velocity that the steam can have at the outlet when the outlet pressure is 300 kpa.

James is trying to prove newton's 2nd law of motion. he tries to move four different objects with different masses, shapes, and sizes from point a to point b. the objects are a toy car, a car, a refrigerator, and a kitchen table. after some experimentation, he finds that force is dependent on the mass of the object, rather than it's size or shape. the object that takes the most force to move is the