Si se lanza un objeto cuyo movimiento es parabólico a una velocidad de 20 m/s a 45 grados, ¿En qué tiempo realiza su recorrido, si su alcance es de 100 metros? URGENTE

According to the law of conservation of mass, in a chemical reaction the total starting mass of all the reactants equal the total final mass of all the products. true or false?

Need asap ‼️ 20 pts which gravitational force field diagram is drawn correctly? (answers in pictures below)

Atomic nuclei of almost all elements consist of