6. Assuming the surface is not frictionless, and the final velocity of the car in the previous question is only 3 m/s, how much energy is lost due to friction?

What is hidden during a lunar eclipse? isn't the moon hidden?

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?

The volume of a gas is halved during an adiabatic compression that increases the pressure by a factor of 2.5. what is the specific heat ratio? show the math steps .