Which of the following is not a vector quantity?
a. mass
b. acceleration
c. displacement
d. velocity
a
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A current element (length = 1.0 cm) lies along the x axis with its center at x = 0 and carries a 20-A current in the positive x direction. Consider only the field of this current element and decide which combination of the following statements is correct. 1. The field at (0, 0, 1.0 m) is in the positive z direction. 2. The field at (0, 1.0 m, 0) is in the negative y direction. 3. The field at
(1.0 m, 0, 0) is zero. 4. The field at (0, 0, 1.0 m) is in the negative y direction. a. 3 and 4 b. 1 and 3 c. 2 and 4 d. 1 and 2 e. None of these
A laser emits monochromatic and coherent light
a. True b. False Indicate whether the statement is true or false
A spacecraft in space keeps going at the same velocity, even without firing its rockets, in accordance with the _______________ law of motion
a. fourth b. first c. second d. third
In addition to revolving around the Sun counterclockwise, most planets also rotate on their axis counterclockwise
Indicate whether the statement is true or false