An untethered block sits on a flatbed truck as it accelerates up an incline that makes an angle of 15° with respect to the horizontal. if the truck speeds up at a rate less than 2.69 m/s2, the block remains on the truck. if the truck speeds up at a rate equal to or greater than this value, however, the block slides off the truck. what is the coefficient of static friction between the truck and the block?

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.