If you add two vectors with magnitudes of 200 and 40, which of the following is the only possible resultant?
A. 100
B. 260
C. 0
D. 200
E. 40
D. 200
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The curved section of a speedway is a circular arc having a radius of 190 m. This curve is properly banked for racecars moving at 34 m/s. At what angle with the horizontal is the curved part of the speedway banked?
A) 34° B) 30° C) 28° D) 32° E) 26°
If you run a 3000-watt hair dryer for 30 minutes, how much electric energy do you consume?
A) 100 kW ? h B) 6 kW ? h C) 1.5 kW ? h D) 90,000 kW ? h E) None of the above.
In the HCl molecule, the bonding electrons spend
a. equal time around both atoms. b. all their time around only one of the atoms. c. more time around the H atom. d. more time around the Cl atom.
You have a piece of clay and a rubber ball, both of the same mass. You want to close a door on the other side of the room by throwing either the clay or the rubber ball at the door. Assume that both would be thrown with the same speed and would impact the door at the same point on the door. With which would you be more likely to cause the door to close further?
1.the rubber ball 2.the clay ball 3.Both would cause the door to close the same distance. 4.It is impossible to tell.