/sci/ - Science & Math

>>6389789
>No. Would have to be so fucking deep.

But that's wrong. It only needs to be deeper than 200 feet to be 100% insulated from surface influence. This is an old idea that has been extensively studied.

>>4285859

250 feet. Needs to be 200 below minimum in ordeer to fully escape the most violent storms. No sense in putting it deeper as that only needlessly increases the pressure resistance requirements.

It would be most economical to simply build it from concrete. The materials needn't flex so long as the joints between sections can flex very slightly and not break the dry seal. One joint isn't much, but it adds up, once you have a tunnel comprised of thousands of sections it will be able to flex and undulate to accomodate currents without issue.

>>4270327

Transatlantic maglev. Not economical now, but it will be when oil rises in price sufficiently.

>>4101909
>train from New York to London

Holy shit, they built it already?

http://current.com/technology/89042567_plans-for-a-4-000mph-underwater-train-from-new-york-to-london
.htm

>>4055211
Not that guy, but:
http://en.wikipedia.org/wiki/Submerged_floating_tunnel
http://current.com/technology/89042567_plans-for-a-4-000mph-underwater-train-from-new-york-to-london
.htm

Which type of student are you /sci/?

http://oic.id.ucsb.edu/international-ta-handbook/teaching-undergraduates/student-expectations-tas

ANXIOUS-DEPENDENT STUDENTS:
The greatest number of students are of this type. They have little self-confidence and are very dependent on the teacher for knowledge and support. Their feelings of incompetence and the outside pressures from others (especially parents) lead them to be overly concerned about grades. They may take notes on everything the TA says and will often ask "Will this be on the test?". They become more involved in the class and less concerned with grades when they feel that the instructor cares about them. With encouragement and patience on the part of the TA, the student has the potential to become a productive and satisfied class member.

SILENT STUDENTS:
These students are quiet out of a feeling of personal insecurity; they judge their own personal worth on the quality of their intellectual ability. Silent students speak only when they are sure that the TA will approve. Although they want a personal relationship with the TA, they are too shy to promote it. A TA who shows interest, encourages the silent students to participate in class, and is supportive of their comments can promote self- confidence in these students and enhance their learning.