Element A, mass 9.00 g, reacts exactly with 5.00 g of element B to form 14.00 g of compound AB. If 36.00 g of element A is reacted with 41.00 g of element B to form the same compound, what mass of compound AB will be formed?
a. 9.00 g
b. 56.00 g
c. 9.00 g
d. 30.00 g
b
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Two parallel conductors each of 0.34 m length, separated by 6.4 × 10^?3 m and carrying 4.8 A in opposite directions, will experience what type and magnitude of mutual force? (magnetic permeability in empty space µ0 = 4? × 10^?7 T?m/A)
a. attractive, 2.1E–3 N b. repulsive, 2.1E–3 N c. attractive, 2.4E–4 N d. repulsive, 2.4E–4 N e. zero
A positive point charge q is placed at the center of an uncharged metal sphere insulated from the ground. The outside of the sphere is then grounded as shown. Then the ground wire is removed. A is the inner surface and B is the outer surface. Which statement is correct?
a.
The charge on A is ?q; that on B is +q.
b.
The charge on B is ?q; that on A is +q.
c.
The charge is 
on A and on B.
d.
There is no charge on either A or B.
e.
The charge on A is ?q; there is no charge on B.
Glaciers will retreat when the amount of accumulation
A) is less than the amount of ablation each year. B) exceeds the amount of ablation each year. C) is equal to the amount of ablation.
For a galaxy 200 Mpc away, a useful standard candle would be the ________
Fill in the blank(s) with correct word