Um corpo foi jogado para baixo, na vertical, do alto de um helicóptero que está a 15 metros de altura em relação ao solo. considerando a aceleração da gravidade de 10 m/s², desprezando a resistência do ar e sabendo-se que ele atinge o solo a uma velocidade de 20 metros por segundo. a velocidade inicial em que o corpo foi jogado, em m/s, é de:

Water at room temperature of 20.0°c is poured into an aluminum cylinder which has graduation markings etched on the inside. the reading in the graduations is 300.0 cc. the cylinder with the water in it is then immersed in a constant temperature bath at a temperature of 100°c. what is the reading for the level of water on the graduations of the cylinder after the water and the cylinder reach thermal equilibrium with the bath? the volume coefficient of expansion of water is 2.07 x 10^-4 k-1, and the linear coefficient of expansion of aluminum is 23.0 x 10^-6 k-1. a) 305.0 cc b) 304.0 cc c) 303.5 cc d) 303.3 cc e) 304.5 cc

Which of the following is an example of motion in two dimensions?

In one or two sentences, describe how you did in the balancing game. in a few more sentences, explain one strategy you learned for balancing more complex equations.