Tuesday 15 Sep:

Key concept: Density & Lab Format

(Go over Quiz

Retakes in Morning this week)

Journal:

 1. Assume that the tip of your little finger (.008m wide) can just cover the sun when it is placed 0.86m away from your eye. If the sun is 149,600,000 kilometers away from the earth, what the sun's diameter? 

   a.   1,390,000 km

   b.   695,800 km

   c. 14,080,000 km

   d.   1,100,000 km

2.  Note the expression: y = x². Which statement is most consistent with this expression?

            a. if y doubles, then x quadruples

            b. y is greater than x

            c. if x doubles, then y doubles

            d. if x doubles, then y quadruples

3.  In mechanics, physicists use three basic quantities to derive additional quantities. Mass is one of the three quantities. What are the other two?

            a. length and force

            b. power and force

            c. length and time

            d. force and time

4. A furlong is a distance of 220 yards. A fortnight is a time period of 2 weeks. A race horse is running at a speed of 5 yards per second. What is his speed in furlongs per fortnight?

    a. 27,491 furlongs/fortnight

    b. 13,674 furlongs/fortnight

    c. 6,221 furlongs/fortnight

    d. 2,749 furlongs/fortnight

1. A     2. D           3. C           4. A

5yds(1 F.L./220yds)(3600sec/1 hr)(24hrs/1 day)(14Day/1 F.N.)  = 27,491FL/FN

Thurs 19 Sep Lab: Mass, Weight & Density

  L#4:  1-15, 18, 22   Due Wed 15 Sep (Mass, Wt, Speed, Vel)

 L#5:  1-15   Due Fri 17 Sep

(More Vectors, Equilibrium)