A cable is 100 m long, has a cross-sectional area of 1.0 mm2, and is made of a material having a Young's modulus of 1.0 × 1011 N/m2. If a 1000-N force is applied to stretch the cable, how far does it stretch?
A) 0.0010 m
B) 0.010 m
C) 0.10 m
D) 1.0 m
E) 10 m
D
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Mass is transferred from a normal star in a close binary system toward a white dwarf. The material that is transferred to the white dwarf forms a rapidly growing whirlpool of material known around the white dwarf known as a(n)
a. accretion disk. b. Lagrangian point. c. Algol paradox. d. planetary nebula. e. supernova remnant.
Under what circumstances can differentiation occur in a planet?
A) The planet must have a rocky surface. B) The planet must be made of both metal and rock. C) The planet must have an atmosphere. D) The planet must be geologically active, that is, have volcanoes, planetquakes, and erosion from weather. E) The planet must have a molten interior.
The stars found in nebulae like the Orion Nebula probably formed
A) within the last few million years. B) about 10 million years ago. C) hundreds of millions of years ago. D) billions of years ago. E) at the beginning of the universe.
An airplane in a wide sweeping "outside" loop can create 0-g inside the aircraft cabin. What must be the radius of curvature of the flight path for an aircraft moving at 180 m/s to create a condition of "weightlessness" inside the aircraft?
a. 1150 m c. 2300 m b. 1800 m d. 3300 m