Brandon is trying to identify the type of metal that makes up four rectangular metal cubes. He has a cube of iron that has a mass of 15.6 g and a volume of 2.0 cm3. He determines the mass and volume of each unknown. Which unknown is most likely to be iron?
A. Unknown A
B. Unknown B
C. Unknown C
D. Unknown D

When applying kirchhoff's rules, one of the essential steps is to mark each resistor with plus and minus signs to label how the electric potential changes from one end of the resistor to the other. the circuit in the drawing contains four resistors, each marked with the associated plus and minus signs. however, one resistor is marked incorrectly. which one is it?

Which of the following is an example of motion in two dimensions?

Hydrogen atoms are excited by a laser to the =4n=4 state and then allowed to emit. what is the maximum number of distinct emission spectral lines (lines of different wavelengths) that can be observed from this system? 8 6 2 7 4 5 1 3 calculate the wavelength of the 4⟶14⟶1 transition. =λ=