Câu 8. Một chất điểm dao động trên trục Ox có phương trình dao động là x=1+4cos(27t+0,257); (X đo bằng cm và t đo bằng s). Gia tốc của chất điểm cực đại tại tọa độ nào?

How much work would be needed to raise the payload from the surface of the moon (i. e., x = r) to an altitude of 5r miles above the surface of the moon (i. e., x = 6r)?

What will a positive and a negative charge do if they are separated from each other?

The speed of sound in ice, water, and steam is shown. what best explains the speed of sound in different states of matter? sound travels fastest in ice because energy is easier to transfer when the molecules are close together. sound travels slowest in steam because the sound has to move around the gas molecules that are far apart. sound travels fastest in ice because the temperature of solids is always greater, so the heat transfers the sound energy. sound travels slowest in steam because the pressure is so great the sound cannot travel though the steam particles.