Symbols on a weather map are called
A) isobars.
B) data.
C) weather elements.
D) weather codes.
Answer: D
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Energy Levels: What is the energy (in electron-volts) of the n = 3 state of atomic hydrogen?
Fill in the blank(s) with the appropriate word(s).
Equilibrium: A 5.00-m-long uniform ladder, weighing 200 N, rests against a smooth vertical wall with its base on a horizontal rough floor, a distance of 1.20 m away from the wall. The coefficient of static friction between the ladder and the floor is 0.200. How far up the ladder, measured along the ladder, can a 600-N person climb before the ladder begins to slip?
A. 1.50 m B. 1.26 m C. 1.05 m D. 3.95 m E. 4.56 m
A series LC circuit in a radio is in resonance with AM 1200 kHz. If the radio station is changed to AM 600 kHz, by what factor must the capacitance be multiplied to again achieve resonance?
a. 4 c. 1/2 b. 2 d. 1/4
A car travels in a flat circle of radius R. At a certain instant the velocity of the car is 24 m/s west, and the acceleration of the car has components of 2.4 m/s2 east and 1.8 m/s2 south. What is the radius of the circle?
a. 0.24 km b. 0.19 km c. 0.32 km d. 0.14 km e. 0.27 km