Physics question of the week (1)

1.  A blender draws 0.25 A when connected to a 120 V outlet.
     a) What is the resistance of the blender?
     b) How much power does it use?
     c) How many electrons pass through the blender in 15 s?

Answer key for math question (1)

(a)

     (i) sin140⁰ = p

     (ii) cos70⁰ = −q

(b)

      Using sin²θ + cos²θ =1

      cos140⁰ = ±√1− p²

      cos140⁰ = − √1− p²

(c)

       tan140 ⁰ = sin140⁰/ cos140⁰

                         = -p / (√1− p²)

Math question of the week (1)

Let p=sin40⁰ and q=cos110⁰. Give your answers to the following in terms of p and/or q

(a) Write down an expression for 

      1. sin140⁰ 

      2. cos110⁰

(b) Find an expression for cos140⁰.

(c) Find an expression for tan140⁰.

Choosing The Right College

When choosing a college, make sure to look at size, location, and the types of

opportunities they offer, and then decide which college fits better with the student’s goals, personality, academic preparation, and financial ability.

What college that is right for the student is not about the rankings of colleges. It is about matching the student with a college that can enable the student to bloom while study there, and to graduate with an education that is a foundation for a fulfilling life in the years ahead.

I do believe that success in life has more to do with the experiences and opportunities obtained while in college, and less to do with the choice of brand-name college. Companies and graduate schools are looking for outstanding skills and experiences students have, not college pedigree.

College Admission

The followings  are some general notes to remember:

• Pay attention to deadlines and dates.
• Keep in mind that  most colleges require at least three, and often prefer four, years of studies in math, English, science, and social studies.
•  Most colleges require at least two years of the same foreign language.
• Your grades are important but the difficulty of your coursework can also be a significant factor in a college's decision to admit you. In general, most colleges prefer students with average grades in tougher courses than students who opt for an easy A.  (e.g., a B in an AP course is worth as much as an A in a non-AP course).
• College admission officers will pay the closest attention to your GPA, class rank, college credit, AP courses, and scores on SAT or ACT.
• Participation in extracurricular activities is also a good idea in high school.