An electric field has a strength of 2.0 n/c. what force does it exert on a charge of 0.004 c?

Which best represents the law of conservation of mass ?

What is similar between metals and suspensions

One soccer player (a) is moving at 4 km/h when she kicks the ball while another soccer player (b) is moving at 8 km/h. what statement accurately compares their kinetic energy if they have the same mass? a) both soccer players have the same kinetic energy. b) player b has twice the kinetic energy of player a. c) player b has four times the kinetic energy of player a. d) their kinetic energy can't be compared without knowing their mass.