First formula is derived by equating centripetal force and gravitational force. So if you vary the "r", what you're doing is varying the distance between the satellite and the centre of the Earth.
This lets you calculate the required orbital velocity at some distance from the centre of the...
For ECON1101, the course is very centred around the textbook and homework is assigned from it so you need to buy it.
For MATH1151, no need for the textbook.
For FINS1613, I didn't find the textbook useful and you really just need MyFinanceLab (if the lecturer is the same and homework is still...
Several reasons:
- Prioritising other things such as work, girlfriend/boyfriend, social activities.
- Ceebs.
- You know that you're able to effectively self-study and feel that you don't need to.
- etc.
Basically you find better things to do with your time and *hopefully* you know you'll do...
Sometimes lectures/tutorials don't end early (depends on your lecturer/tutor) and so it's unavoidable.
I had a lecture in Biomedical Theatre (very top of campus) which always ran till the end of the hour and then another lecture in Chemical Sciences (all the way at the bottom of campus).
I...