In a chemical reaction, the total mass of the reactants is 10.0 grams. After the reaction, the total mass of the products must be what?

Karen is running forward at a speed of 9 m/s. she tosses her sweaty headband backward at a speed of 20 m/s. the speed of the headband, to the nearest whole number relative to a stationary observer watching karen

Observations show that interstellar clouds can have almost any shape and

How is the acceleration of an object in uniform circular motion constant? a - in magnitude only b - in direction only c - in both magnitude and direction d - in magnitude, direction & orientation