The ionic compound made of Fe3+ and CO32- ions would have the formula
a. Fe3(CO3)2.
b. FeCO3.
c. Fe2(CO3)3.
d. none of these
c
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The surface of Venus is dominated by ________.
A. recent lava flows B. scarps C. large canyons D. impact craters E. oceans of sulfuric acid
During a snowball fight two balls with masses of 0.30 and 0.70 kg, respectively, are thrown in such a manner that they meet head-on and combine to form a single mass. The magnitude of initial velocity for each is 12.0 m/s. What is the speed of the 1.0-kg mass immediately after collision?
a. zero b. 4.8 m/s c. 12 m/s d. 8.4 m/s e. 3.6 m/s
The primary difference between infrared and visible light is that
A. infrared travels faster than visible light. B. they have different wavelengths. C. they have different amplitudes. D. no materials currently known have the ability to reflect infrared. E. infrared does not have a magnetic field associated with its electric field.
A light ray reflects from a surface. If the angle of incidence is 
what is the angle between the reflected ray and the incident ray at the surface?
a. 
b. 
c. 
d. 
e. 