A child is riding a merry-go-round, which has an instantaneous angular speed of 1.25 rad/s and an angular acceleration of 0.745 rad/s2
The child is standing 4.65 m from the center of the merry-go-round. (a) What is the magnitude of the acceleration of the child?
(b) What angle does the acceleration of the child make with the tangential direction?
(a) 8.05 m/s2
(b) 64.5°
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What is the angular separation of the two second-order spectral lines having wavelengths 417 nm and 388 nm using a diffraction grating having 456 lines/mm?
A) 1.63° B) 1.52° C) 0.815° D) 3.26°
Kirchhoff's Rules: In the circuit shown in the figure, R1 = R2 = 90.0 ?, R3 = R4 = 20.0 ?, V1 = 7.0 V, V2 = 8.0 V, and the batteries are both ideal. What current does the ammeter read?
A. 0.40 A B. 0.050 A C. 0.83 A D. 0.056 A
The Sun's average surface (photosphere) temperature is about
A) 1,000,000 K. B) 5,800 K. C) 1,000 K. D) 37,000 K.
On each given day and location, tides rise and fall at
A) about the same time. B) exactly the same time. C) different times. D) ever increasing rates daily.