Is there any rule of thumb to decide the indentation hardness test?
Earth ScienceAsked by: Becky Rabe How do you calculate indent hardness? In microindentation testing, the hardness number is based on measurements made of the indent formed in the surface of the test specimen. The hardness number is based on the applied force divided by the surface area of the indent itself, giving hardness units in kgf/mm².
If Earth had rings would gravity exerted by Earth decrease?
Earth ScienceAsked by: Janet Dunn Rings wouldn’t decrease the gravity much, but the exact amount would depend on the exact geometry of the rings. One reason is that the gravity of one side of the ring would partially cancel the attraction of the other side. What would happen to Earth if it had rings? At the
Can airplanes trigger rain?
Earth ScienceAsked by: Janet Dunn Planes flying through clouds can increase rain or snowfall by as much as a factor of ten, scientists in Finland have discovered. This intensification of precipitation is not caused by emissions, say the researchers, but by ice crystals created as the aircraft’s wings pass though cloud layers above active rain or
Is Antarctic sea ice at record levels?
Earth ScienceAsked by: Thao Adams Sea ice around Antarctica has reached a record low in four decades of observations, a new analysis of satellite images shows. Is Antarctic sea ice increasing? From the start of satellite observations in , total Antarctic sea ice increased by about 1 percent per decade. Whether the increase was a sign
Where does all the earth from surface mining go?
Earth ScienceAsked by: Thao Adams How does surface mining affect the Earth? Surface mining (another name for “strip mining”) can severely erode the soil or reduce its fertility; pollute waters or drain underground water reserves; scar or altar the landscape; damage roads, homes, and other structures; and destroy wildlife. Where does surface mining happen? There are
What role does the hydrosphere play in tectonic plate convection?
Earth ScienceAsked by: Melissa Craven Large convection currents in the aesthenosphere transfer heat to the surface, where plumes of less dense magma break apart the plates at the spreading centers, creating divergent plate boundaries. What role does water play in plate tectonics? On the Earth, water plays a necessary role in shaping plate tectonic activity, as