Um atirador dispara um revólver formando um ângulo de 37º com a horizontal, em uma região plana, a uma altura de 2 m do solo. o projétil atinge o solo a 88,8 m do ponto de lançamento. qual é a velocidade com que o projétil deixou o revólver? dados: cos 37º = 0,8 sen 37º = 0,6

Scout feels ill one day before school. her mother puts a thermometer in her mouth and the temperature begins to climb to 100°f. what is happening between the cooler thermometer and scout's body? a) scout's body is applying a force to the particles in the thermometer. b) kinetic energy is being transferred from her mouth to the thermometer. c) potential energy is being lost by the thermometer and gained by scout's body. d) the potential energy stored in foods is converted to mechanical energy to raise the mercury in the thermometer.

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

Why don't you see your reflection in water with waves or repples