A rock sample is analyzed using the Carbon 14 method. If the D/P rario is 1/64, how old is the sample in years?

1. low risk for tissue damage

2. Non invasive

3. No Radiation

Explanation:

MRI: Magnetic Resonance Imaging. In this diagnostic technique, powerful magnetic field and radio waves are used to make detailed pictures of body parts and tissues.

Ultrasound: In this technique sound waves of frequency more than 20000 Hz are used for imaging.

Both of these technique are non invasive, pose a very little threat to tissue damage and use no radiation. But differs in:

1. Use of radio waves: Only MRI technique uses radiation waves while Ultrasound uses sound waves.

2. Tomographic Imaging: Tomography imaging involves imaging by sectioning. But only MRI uses tomography imaging process.