The magnitude of an earthquake, measured on the richter scale, is m log1o t where / is the amplitude registered on a seismograph 100km away from the seismic center, and lo is a certain very small amplitude. using the richter scale, find the magnitude rating for an earthquake causing an amplitude of 10,000,000 times lo

Agroup of students is studying convection currents. they fill two identical balloons with the same amount of helium. one balloon is placed in a freezer and the other in an area with warm air. after 10 minutes, the balloons are released from a height of 1 meter. which of the following do the students most likely observe? a. the balloons both rise. the cold balloon is larger than the warm balloon. b. the balloons rise at the same rate. both balloons are the same size. c. the warm balloon expands and rises. the cold balloon shrinks and sinks. d. the cold balloon expands and rises. the warm balloon shrinks and sinks.

What is the mass of 8 moles of sodium atoms

Citric acid has a ph between 1 and 3.  it is considered to be aa. weak acidb. weak basec. strong based. strong acid