Answer:20 minutes
Explanation:
06:58am - 06:38am =20 minutes
A magnetic field is a force field, invisibly pushing electrically charged objects just as a gravitational field pulls objects with mass. Whereas all objects with mass exert a gravitational field, however, not all objects have a magnetic field. Magnetic fields are created by electrical charges. Thanks to their structure at the atomic level, some substances -- like the iron in magnets -- have a permanent magnetic field.
Answer:
The loudness of sound is determined by<u> </u><u>Amplitude</u> of Vibration.
Explanation:
Louder Sound waves have higher amplitude(more energy and reach at far distances),Softer Sound have less amplitude.
Amplitude : The maximum disturbance of vibrating particle from their mean position.(/the height of peak)