Calvin
Home Page
Homeworks
Lab Projects
Log Out
Help
Version 2.31i, Aug 15, 2004
Copyright © 2003-2004 Gradiance Corporation
Gradiance Online Accelerated Learning
Title:
General Science/Math
Positive points per question:
3.0
Negative points per question:
1.0
Number of questions:
4
Description:
A collection of questions from High-School/Early College analytic subjects. This assignment shows an ongoing homework, where students see the choice explanations every time they make an incorrect answer, but they do not get to see the full explanations.
1.
A projectile is fired with an initial velocity in the x (horizontal) direction of 1000 ft./sec. and an initial velocity in the y (vertical) direction of 500 ft./sec. Write the equation that gives y as a function of x. Demonstrate the correctness of your solution by selecting, from the list below, the (x,y) point that is on the trajectory of the projectile.
a) x = 2000; y = 936.
b) x = 4000; y = 1488.
c) x = 1000; y = 500.
d) x = 1000; y = 468.
2.
A farmer has 100 yards of fence, with which to create a rectangular cow pasture along a straight river. The side facing the river does not have to be fenced, but the other three sides do. Find, in feet, the sides and area of the pasture that has the largest possible area. Then identify the correct statement from the list below.
a) One side is 75 ft. long
b) The area is 5625 sq. ft.
c) One side is 100 ft. long
d) One side is 200 ft. long
3.
Suppose we try to estimate the area under the curve f(x) = x
^{2}
, from x=0 to x=1, using the trapezoidal rule. The error in the estimate decreases as we use more trapezoids. Suppose we use k trapezoids; i.e., we use the values of f(x) at x=0, x=1/k, x=2/k,...,x=(k-1)/k, x=1. Compute the error in the estimate for k=2, k=3, and k=4. Then, identify the correct statement below.
a) For k=4, the error is 1/96.
b) For k=3, the error is 0.
c) For k=2, the error is 5/12.
d) For k=2, the error is 3/8.
4.
Which of the following elements binds most strongly with Oxygen?
a) Aluminum
b) Silicon
c) Hydrogen
d) Nitrogen