A person would like to pull a car out of a ditch. This person ties one end of a chain to the car’s bumper and wraps the other end around a tree so that the chain is taut. The person then pulls on the chain perpendicular to its length, as shown in the picture. The magnitude of the force that the chain exerts on the car in this situation is
A. Much smaller than the force the person exerts on the chain.
B. About equal to the force the person exerts on the chain.
C. Much bigger than the force the person exerts on the chain.
C. Much bigger than the force the person exerts on the chain.
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What is in the box shown below? 
A. Positive charge B. Negative charge C. Zero charge D. One cannot determine the charge’s sign from this diagram.
A conductor is distinguished from an insulator with the same number of atoms by the number of:
A) nearly free atoms B) electrons C) nearly free electrons D) protons E) molecules
Which of these does NOT exist?
A) a million solar mass black hole B) a 6 solar mass black hole C) a 6.8 solar mass neutron star D) a 1.0 solar mass white dwarf E) a 0.06 solar mass brown dwarf
Energy Conservation With Conservative Forces: What is the minimum energy needed to lift a 1.0-kg rocket to a height of 200 km and to give it a speed of 8.0 km/s at that height? (Neglect air resistance and the small decrease in g over that distance.)
A. 34 TJ B. 34 kJ C. 34 MJ D. 34 GJ E. 34 J