The Earth is like our mother.She gives live to all the living things on the Earth.And she provice us with air、food、water and other things we need for living.Once she was beautiful ahd rich.But mow she is crying, becacuse she is becoming dirtier and dirtier, poorer and poorer. It'...
(a) What are isotopes? (b) What is the percent natural abundance of isotopes? Which of the following isotopes is most likely to be stable and why? a. 72Rb b. 57Cr c. 38Ar d. 42Sc e. 23Mg Which of the following isotopes of oxygen has nine neutrons? a. 16O b. 17O...
The average atomic mass of the element is the average of the atomic masses of its isotopes, which takes into account the percentage of occurrence of each isotope (percent abundance) and is defined as the percentage of a given isotope of an element compared to the total abundance (100%) of ...
Answer to: Rhenium (75Re) has two naturally occurring isotopes with atomic weights 184.9530 and 186.9560. What is the percent abundance of the...
Permaculture is built on three straightforward core ethics. Caring for the earth, caring for people, and fair sharing of the earth’s resources and abundance. As listed in Roth, (2011) these core ethics support 12 design principles defined byDavid Holmgren, a founder of permaculture. These desi...
What’s more, layoffs don’t necessarily save as much as other cost reduction methods.Two years of researchwith major manufacturing businesses across a range of sectors show that traditional cost reduction methods (such as layoffs) save only about 2 percent in costs, while using digital and anal...
About 50 percent of the species on Earth became extinct, including many other large reptiles, like pterosaurs and plesiosaurus, as well as lots of plant species and marine animals. Other life forms, such as ferns, flourished by taking advantage of the sudden abundance of natural resources. ...
Increased productivity is needed if we are to meet the dual existential challenges of the 21st century: closing the empowerment gap and achieving net zero. According to McKinsey Global Institute research, closing these gaps will require the equivalent of 8 percent of global GDP annually, which ...
With an Arab population of ten million, Ahwaz is among the most resource-rich territories occupied by Iran, holding more than 80 percent of the country’s oil and gas resources. The region has three major rivers, the Karoon, Jarrahi and Karkheh, which play a vital role in the lives of ...
by 100’s of percent, by simple assertion, no supporting phsyics attempted. Environmentalist models are contrived frauds, built on erroneous and cherry picked assertions and given wholly unrealistic powers by their modellers, AKA “sensitivities”, which border on “Superpowers” in hmasn as regar...