An Olympic skier moving at 22.0 m/s down a 30.0° slope encounters a region of wet snow, of coefficient of friction µk = 0.740 . How far down the slope does she go before stopping?
a. 119 m
c. 175 m
b. 145 m
d. 199 m
C
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Electric Field of Point-Charges: The electric field at a point 2.8 cm from a small object points toward the object with a strength of 180,000 N/C. What is the object's charge q? (k = 1/4??0 = 8.99 × 109 N ? m2/C2)
A. -16 nC B. +16 nC C. -17 nC D. +17 nC
Answer the following statement(s) true (T) or false (F)
1. Consider an infinite solenoid. Imagine placing a mirror so that mirror’s plane contains the solenoid’s central axis. Such a mirror would satisfy the conditions of the mirror rule. 2. An infinite solenoid’s magnetic field is uniform everywhere in the solenoid’s hollow interior.
What kind of waves are produced by the alternating current in standard electric power lines?
A) 60 Hz electromagnetic waves. B) 60 Hz electro-chemical waves. C) 100 MHz [mega-hertz] electromagnetic waves, in the FM radio region of the spectrum. D) Standard AC is simply a vibration of electrons that doesn't produce any kind of waves at all. E) 100 MHz sound waves.
When an acid reacts with a carbonate or hydrogen carbonate, the products are water, carbon dioxide, and ______________
Fill in the blank(s) with correct word