A +2.0-nC point charge is placed at one corner of a square (1.5 m on a side), and a -3.0-nC charge is placed on a corner diagonally away from the first charge. What is the magnitude of the electric field at either of the two unoccupied corners?
a. 20 N/C
b. 14 N/C
c. 4.0 N/C
d. 12 N/C
e. 8.0 N/C
B
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A critical aircraft part made from 7075-T651 aluminum will be prooftested to 90% of the yield strength of 496 MPa, to ensure that no large internal defects are present in the part. If the part passes the proof test, what can we assume is the largest internal crack in the part?
What will be an ideal response?
An object 4 cm high is placed 15 cm in front of a convex mirror with a focal length of ?10 cm. What is the image position (in cm)?
a. ?8 b. ?4 c. ?2 d. ?6 e. 30
Constant Acceleration Kinematics: A cart with an initial velocity of 5.0 m/s to the right experiences a constant acceleration of 2.0 m/s2 to the right. What is the cart's displacement during the first 6.0 s of this motion?
A. 10 m B. 55 m C. 66 m D. 80 m
When considering light as made up of individual "pieces," each characterized by a particular amount of energy, the pieces are called
A) photons. B) wavicles. C) gamma rays. D) frequencies.