a.) A soccer player kicks a rock horizontally off a 30 m high cliff into a pool of water. If the player hears the sound of the splash 2.64 s later, what was the initial speed given to the rock (in m/s)? Assume the speed of sound in air is 343 m/s. b.) If the temperature near the cliff suddenly falls to 0°C, reducing the speed of sound to 331 m/s, what would the initial speed of the rock have to be (in m/s) for the soccer player to hear the sound of the splash 2.64 s after kicking the rock?

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Density of Solids

The density of a substance refers to how much matter is present in a given amount of space. It is expressed as the ratio of the mass of the substance to its volume.