Which of the following statements about electrical charge is true?
A) Two negative charges will attract each other.
B) Two positive charges will attract each other.
C) A positive charge and a negative charge will repel each other.
D) A positive charge and a negative charge will attract each other.
D) A positive charge and a negative charge will attract each other.
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A 4.00 kg object is moving at 5.00 m/s NORTHWEST. It strikes a 6.00 kg that is moving SOUTHWEST at 2.00 m/s. The objects have a completely inelastic (stick together) collision. The velocity of the 6.00 kg object after the collision is
A. 2.33 m/s at an angle of 45.0 degrees NORTH of WEST. B. 3.89 m/s at an angle of 35.0 degrees NORTH of WEST. C. 3.89 m/s at an angle of 14.0 degrees NORTH of WEST. D. 2.33 m/s at an angle of 14.0 degrees NORTH of WEST. E. 2.33 m/s at an angle of 35.0 degrees NORTH of WEST.
A tightrope walker walks across a 30-m long wire tied between two poles. The center of the wire is displaced vertically downward by 1.0 m when he is halfway across
If the tension in both halves of the wire at this point is what is the mass of the tightrope walker? Neglect the mass of the wire. A) 85 kg B) 43 kg C) 74 kg D) 91 kg
A starship is constructed to be 100 m long in the factory. It is launched and as it coasts by Earth, it is measured to be shortened to 5.48 m long
(a) How fast, in terms of the speed of light, is it moving past Earth? (b) What length does the ship's crew measure for the ship?
Layered sedimentary rocks and foliated metamorphic rocks share similarities because
A) most foliated metamorphic rocks are derived from layered sedimentary rocks. B) they both are formed layer upon layer. C) the minerals in these two types of rocks form in parallel planes. D) both rock types are subjected to compressive forces.