How are igneous rocks formed?
They are formed from cooled magma.
They are hot magma the...
Answers: 1
Physics, 21.06.2019 20:00
Which sentences describe disadvantages of burning fossil fuels instead of using hydrogen fuel cells? burning fossil fuels contributes to climate change. burning fossil fuels takes place inside expensive fuel cells. fossil fuels aren't widely available, but pure hydrogen is. fossil fuels are nonrenewable.
Answers: 1
Physics, 21.06.2019 20:00
The chemical effect of the endocrine system is longer lasting than the chemical effect of the nervous system. select the best answer from the choices provided t f
Answers: 3
Physics, 22.06.2019 10:10
Which branches of natural science include the study of an organism that lived 10 million years ago
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Physics, 22.06.2019 10:50
Asheet of steel 1.5 mm thick has nitrogen atmospheres on both sides at 1200oc and is permitted to achieve a steady-state diffusion condition. the diffusion coefficient for nitrogen in steel at this temperature is 6 x 10- 11 m2 /s, and the diffusion flux is found to be 1.2 x 10-7 kg/m2 -s. also, it is known that the concentration of nitrogen in the steel at the high-pressure surface is 4 kg/m3 . how far into the sheet from this high-pressure side will the concentration be 2.0 kg/m3 ? assume a linear concentration profile.
Answers: 3
English, 30.09.2020 04:01
English, 30.09.2020 04:01
Mathematics, 30.09.2020 04:01
Mathematics, 30.09.2020 04:01
Mathematics, 30.09.2020 04:01
Mathematics, 30.09.2020 04:01
English, 30.09.2020 04:01
Mathematics, 30.09.2020 04:01