Prove that if u is a least upper bound for a subset 5 of JR, then 2u is a least upper

Introductory Chemistry 5
A 45-kg sample of water absorbs 345 kJ of heat. If the water was initially at \(22.1\ ^{\circ}\mathrm{C}\), what is its final temperature? Equation Transcription: Text Transcription: 22.1 deg C

College Physics 1
Problem 6CQ Suppose you take two steps A and B (that is, two nonzero displacements). Under what circumstances can you end up at your starting point? More generally, under what circumstances can two nonzero vectors add to give zero? Is the maximum distance you can end up from the starting point A +

Anatomy & Physiology 1
Athletes may take synthetic EPO to boost their ________. a. blood calcium levels b. secretion of growth hormone c. blood oxygen levels d. muscle mass

Campbell Biology 10
Patients with damage to Wernickes area have difficulty a. coordinating limb movement. b. generating speech. c. recognizing faces. d. understanding language

Principles of Economics 6
What is the main advantage of using the midpoint method for calculating elasticity?

Psychology 12
What are some newborn abilities, and how do researchers explore infants mental abilities?

Principles of Economics 9
In a market with a binding price ceiling, increasing the ceiling price will a. increase the surplus. b. increase the shortage. c. decrease the surplus. d. decrease the shortage.

Chemistry for today : general, organic, and biochemistry 9
Explain why the rate of chemical reactions is generally slow for organic compounds and usually fast for inorganic compounds.