Which of the following statements about carbocation stability and aldol reactions is correct?

• 1 . A primary carbocation is more stable than a tertiary carbocation.
• 2. In an aldol reaction, a base abstracts a proton from the α-carbon, leading to an enolate ion.
• 3. The stability of carbocations decreases with resonance stabilization.
• 4. Aldol condensation occurs without the formation of an enolate ion.

A spring has tension 5N at x₁ extension and 7N at x₂ extension. Determine the tension in the spring when the extension is 5x₁ - 2x₂.

• 1. Eleven Newtons (11 N)
• 2. Thirty-Nine Newtons (39 N)
• 3. Twenty-Five Newtons (25 N)
• 4.Twelve Newtons (12 N)

A spring has tension 5N at x1 extension and 7N at x2 extension. Determine the tension in the spring when the extension is 5x1 - 2x2.

• 1. 11 N
• 2. 39 N
• 3. 99 N
• 4.16

A spring has tension 5N at x1 extension and 7N at x2 extension. Determine the tension in the spring when the extension is 5x1 - 2x2.

• 1. 111 N
• 2. 139 N
• 3.199 N
• 4.3316 N