A material of heat capacity 380J/kg/K is heated from 25oC to 75oC. Calculate i. the mass of the

substance
ii. The quantity of heat absorbed.

Um vetor representa um deslocamento cujo módulo é 20 m. se v faz um ângulo de 60 graus com a horizontal, qual é o valor das componentes horizontal e vertical deste vetor?

Simple machines can a. increase force only b. decrease force only c. increase or decrease force

A0.580-kg rock is tied to the end of a string and is swung in a circle with a radius of 0.500 meters. the velocity of the rock is 4.50 m/s. what is the centripetal force acting on the rock? 15.5 n 5.22 n 69.8 n 23.5 n