Yes and that it’s more properly ΣF = ma. A lot of students forget that it’s the sum of the force vectors, not just a single force, when they’re first learning physics.
My teachers were terrible at explaining that concept. In retrospect they did more damage than good with their explanation. It also doesn't help that vectors are introduced much later in math than mechanics in physics(at least where I live).
I had a red JVC PC-30 single deck that took something like 8 D-cell batteries... it had touchy volume controls that needed cleaning all the time because any dust or oxidation would sound like white noise mixed with nails on a chalkboard when changing the volume. It was kinda cool because the speakers detached. I often plugged in a $300 Sony Discman with crazy skip buffering and anti-skip tech (D-828K).
I was lucky.. there was a Tower Records 1/2 mile (1 km) from my house, the one where Metallica played that concert in the parking lot. And somehow I acquired a 1990 West German The Doors - The Doors CD.
Actually, the most important part is clinker manufacturing which then leads to Portland cement that leads to concrete. If manufacturing occurred in a sealed chamber and adding a step that consumes or captures carbon emissions would be a logical improvement considering it is a nontrivial amount of GHG emissions.
Lime is a close second, but not as important when compared to the energy needs and chemical processes involved in clinker manufacturing.
I remember this in one of the three Yes Men feature film documentaries. They went to Bhopal and residents were happy about The Yes Men trolling the media, if only to bring more attention to how horribly they were treated before, during and after the incident.
When I was younger, I didn't have to do anything particularly special to get job/intern interviews at IBM Almaden, MIT Lincoln Labs or Trimble Navigation. Master your craft to an obsessional level, follow-up with any expressed interest or requests for data/CV and show curiosity by asking good questions.
I have, back in the day.. both floppy-controller and IDE based... with a whopping range of storage from 220 MiB to 4 GiB.
Since I don't have enough karma to write another comment anonymously:
Restoring from backups is a last resort for very important files deleted more than a few days ago (beyond what hourly/daily snapshots contain) or for business continuity (BCP) / disaster recovery (DR) of an entire system that cannot be recovered via automated configuration management rebuild. Snapshots to nearline storage reduce RTO for most common use-cases, and most users and systems don't generate much churn of data in a day. For recovery of important files, sending a courier out to retrieve a backup tape set from the vaulting provider implies the RTO would accept in a matter of several hours. An RTO of under an hour would imply backups would need to be stored on nearline media (commodity spinning rust) or at a backup cloud vendor like AWS Glacier or Tarsnap, which is more expensive than tape.
The deciding factor of how much to rationally spend on DR/BCP solutions follows from a Business Impact Analysis (BIA) to quantify the loss of a service over a certain time, which drives RTO and RPO goals. (A common factoid of DR/BCP is "about half of businesses who lose their data go out of business within six months.")
RTO - Recovery Time Objective - desire/need to recover within a certain time window
RPO - Recovery Point Objective - how close to the original is the recovery
I worked at IT for a large university. We had an HP/Compaq SSL2020 with dual AIT drives made by Sony. The issue was never determined (perhaps micro debris in the air), but the drives has to be replaced nine (9) times due to failure. Furthermore, backup and verification is a tedious process, and combined with local and offsite vaulting and tape management, having proper backups is a royal PITA but there's no substitute. Replication isn't a backup because it propagates errors and you can't do disaster recovery without proper software, offsite vaulting and practice.
