Solve Applied Problems Involving Vectors
-The Magnitude and Direction of Two

question 175

Multiple Choice

Solve Applied Problems Involving Vectors
-The magnitude and direction of two forces acting on an object are 35 pounds, $\mathrm { N } 45 ^ { \circ } \mathrm { E }$ , and 55 pounds, $\mathrm { S } 30 ^ { \circ } \mathrm { E }$ , respectively. Find the magnitude, to the nearest hundredth of a pound, and the direction angle, to the nearest tenth of a degree, of the resultant force.

• A) \(\mid \mathbf { F } \| = 57.04 ; \quad \theta = - 23.6 ^ { \circ }\)
• B) \(\| \mathbf { F } \| = 65.19 ; \theta = - 7.5 ^ { \circ }\)
• C) \(\mid \mathbf { F } \| = 43.30 ; \theta = 2.7 ^ { \circ }\)
• D) \(| \mathbf { F } | = 49.17 ; \theta = - 11.3 ^ { \circ }\)

Describe the capacity and duration of memory storage at different levels.

Explain the experimental methods and findings of key memory studies, including those by Ebbinghaus and Sperling.

Understand the concept and techniques of memory improvement, including chunking and rehearsal.

Recognize the role of attention in the process of memory.