If a star appears to move back and forth relative to other stars over a six-month period, this motion is due to the star's
A) transverse motion.
B) radial motion.
C) parallax shift.
D) Doppler shift.
E) true space motion.
C
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When a nucleus undergoes alpha decay, the daughter element always has
A. more electrons than the parent. B. less charge than the parent. C. more neutrons than the parent. D. the same atomic number as the parent.
Write the number 0.00056 in power of ten notation
A) 5.6 × 10-5 B) 5.6 × 10-4 C) 5.6 × 10-3 D) 5.6 × 10-2 E) 5.6 × 10-1
The objective and the eyepiece of a microscope have focal lengths of 4.00 mm and 25.0 mm, respectively
The objective produces a real image 30 times the size of the object. The final image is viewed at infinity, and the near point of the microscope user is at 25.0 cm. What is the distance between the object and the focal point of the objective? A) 0.13 mm B) 0.18 mm C) 0.23 mm D) 0.28 mm E) 0.33 mm
An ideal gas is confined to a container with constant volume. The number of moles is constant. By what factor will the pressure change if the absolute temperature triples?
a. 1/9 b. 1/3 c. 3 d. 9