O texto sobre o paraquedista informa que a subida da cápsula impulsionada por um balão aerostático durou aproximadamente 2 horas. Sabendo-se que a altitude máxima atingida foi 39 km, determine a velocidade média de subida do balão?

How are positive ions different from neutral atoms

On a frictionless air track, a blue glider with mass 0.200 kg is moving to the right with a speed of 8.00 m/s. it strikes a red glider that has mass 0.600 kg and that is initially at rest. after the collision, the blue glider is moving to the left with a speed of 3.00 m/s.(a) what are the magnitude and direction of the velocity of the red glider after the collision? (b) is this collision elastic?

Four identical lab carts each have a mass of 200 kg. different masses are added to the carts and the velocities are measured. all carts move to the right.