The radius of Earth is about __________ mi
a. 6000
b. 8000
c. 4000
d. 2000
c
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Thermal Expansion: The coefficient of linear expansion of copper is 17 × 10-6 K-1. A block of copper 30 cm wide, 45 cm long, and 10 cm thick is heated from 0°C to 100°C What is the change in the volume of the block?
A. 2.3 × 10-5 m3 B. 4.6 × 10-5 m3 C. 5.2 × 10-5 m3 D. 6.9 × 10-5 m3 E. 14 × 10-5 m3
The study of rocks is called
a. petrology. b. mineralogy. c. paleontology. d. geology.
Time Dilation: Astronaut Rachel leaves Earth in a spaceship at a speed of 0.960c relative to an observer on Earth. Rachel's destination is a star system 14.4 light-years away (one light-year is the distance light travels in one year). According to Rachel, how long does the trip take?
A. 14 years B. 15 years C. 11 years D. 4.2 years E. 23 years
Electromagnetic radiation of wavelength 200. nanometers is which type?
A) X-rays B) ultraviolet C) microwaves D) AM radio E) visible