The correct answer is “C” ultrasound. Hope this helps!
The frequency of the wave is 4 Hz
You can estimate one more digit past the smallest division on the measuring device. If you look at a 10mL graduated cylinder, for example, the smallest graduation is tenth of a milliliter (0.1mL). That means when you read the volume, you can estimate to the hundredths place (0.01mL).
<span>B. because they cannot make light rays converge</span>
