<p>Sound travels \(330\) metres in \(1\) second.</p>
<ol class="abc-list"><li data-list-item-id="item-a" data-list-item-path="item-a"><div class="list-item-paragraph">Express the speed of sound in kilometres per second, giving your answer in standard form.<span class="inline-marks">[1]</span></div></li><li data-list-item-id="item-b" data-list-item-path="item-b"><div class="list-item-paragraph">A ship wanted to use ultrasonic sound wave to detect the depth of the sea from the sea level. It sent out a sound wave and received its echo in \(9.5 \times 10^6\) microseconds. Find the depth of the sea from the sea level, give your answer in standard form.<br>(\(1\text{ microsecond} = 1 \times 10^{-6}\text{ second}\))<span class="inline-marks">[2]</span></div></li></ol>

Sound travels \(330\) metres in \(1\) second.

Express the speed of sound in kilometres per second, giving your answer in standard form.

A ship wanted to use ultrasonic sound wave to detect the depth of the sea from the sea level. It sent out a sound wave and received its echo in \(9.5 \times 10^6\) microseconds. Find the depth of the sea from the sea level, give your answer in standard form.
(\(1\text{ microsecond} = 1 \times 10^{-6}\text{ second}\))

Standard Form and Compound Interest

Standard Form and Compound Interest