If the speed of sound is 1100 feet per second and a tuning fork oscillates at 440 cycles per second, what is the wavelength ? of the sound produced?
A. 2.5 feet
B. 4.4 feet
C. 0.4 foot
D. 11 feet
Answer: A
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What part of the eye creates the most refraction as light passes through it?
A. Cornea B. Aqueous humor C. Iris D. Lens
A long solenoid (n = 1 200 turns/m, radius = 2.0 cm) has a current of a 0.30 A in its winding. A long wire carrying a current of 20 A is parallel to and 1.0 cm from the axis of the solenoid. What is the magnitude of the resulting magnetic field at a point on the axis of the solenoid?
a. 0.60 mT b. 0.85 mT c. 52 mT d. 0.40 mT e. 0.75 mT
On average, elliptical galaxies are much older than large spiral galaxies
Indicate whether the statement is true or false
When the alignment of the Sun, the Moon, and Earth produce a solar eclipse, the body between the other two is the
A) Sun. B) Moon. C) Earth.