Choose the correct word(s) that make the statement true. Say you live in the southern hemisphere and the date is March 20 . For you, summer is ending. Therefore, the March 20th date is the first day of (spring, summer, fall, winter), an event called the (vernal equinox, summer solstice, autumnal equinox, winter solstice)
What will be an ideal response?
fall, vernal equinox
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What is an inertial reference frame? It is one
a. that does not accelerate. c. that accelerates at a constant rate. b. that accelerates at a varying rate. d. in which velocities are all constant.
Camera Exposure: The focal length of a camera lens is 40 mm and its aperture diameter is 10 mm. What is the f-number of this lens?
A. 4.0 B. 2.0 C. 5.6 D. 0.25 E. 0.40
A 1000-turn toroidal solenoid has a central radius of 4.2 cm and is carrying a current of 1.7 A. What is the magnitude of the magnetic field inside the solenoid at the central radius? (?0 = 4? × 10-7 T • m/
A) A) 8.1 mT B) 51 mT C) 16 mT D) 81 mT E) zero
In the typical household AC voltage of 311 V, what is the peak voltage?
a. 622 V b. 440 V c. 311 V d. 220 V e. 156 V