When adding two numbers, the number of significant figures in the sum is equal to the number of significant figures in the least accurate of the numbers being added
A) True
B) False
Answer: B
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A projectile is fired from ground level with an initial speed of 55.6 m/s at an angle of 41.2° above the horizontal. Neglect air, take upward as the positive direction, and use g = 9.8 m/s2
(a) Determine the time necessary for the projectile to reach its maximum height. (b) Determine the maximum height reached by the projectile. (c) Determine the horizontal and vertical components of the velocity vector at the maximum height. (d) Determine the horizontal and vertical components of the acceleration vector at the maximum height.
Magnetic Field of a Long Wire: A very long thin wire produces a magnetic field of 0.0020 × 10-4 T at a distance of 1.0 mm from the wire. What is the magnitude of the current? (?0 = 4? × 10-7 T ? m/A)
A. 1.0 mA B. 2.0 mA C. 4000 mA D. 3100 mA
Water must be pumped out of water-table wells but not out of ______________ wells
Fill in the blank(s) with correct word
When a beam of light in air is incident at an angle of incidence ?i < 90° on a piece of glass, the angle of refraction is larger than the angle of incidence
Indicate whether the statement is true or false