What is the hardness of talc on the Mohs scale?
a. 1
b. 4
c. 7
d. 10
a
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The geocentric model of the solar system is attributed to
a. Kepler. b. Brahe. c. Copernicus. d. Aristotle.
A 50-kg air conditioner is placed on top of a concrete pad that is 20 cm thick and has a cross-sectional area of 3.0 m2. What is the change in thickness of the pad caused by the air conditioner? Young's modulus for concrete is 2.3 × 1010 N/m2
A) 1.4 × 10-9 m B) 2.8 × 10-9 m C) 1.4 × 10-8 m D) 1.4 × 10-7 m E) 2.8 × 10-8 m
An astronaut leaves Earth in a spaceship at a speed of 0.960c relative to an observer on Earth
The astronaut's destination is a star system 14.4 light-years away (one light-year is the distance light travels in one year.) According to the astronaut, how long does the trip take? A) 14.4 y B) 15.0 y C) 9.34 y D) 4.20 y E) 22.7 y
Describe the process of storing electrical energy in a capacitor
What will be an ideal response?