It usually takes under a minute for an ultrasonography tool to assess whether a critically injured patient has time for a CT scan or needs to be rushed directly to the operating room. As the ...

This explains why a dog can hear the ultrasound produced by a dog whistle, but humans cannot. A builder uses an ultrasonic device to measure the length of a room. The device shows that the ...

This explains why a dog can hear the ultrasound produced by a dog whistle, but humans cannot. A builder uses an ultrasonic device to measure the length of a room. The device shows that the ...