Of the following, pH ____ is the most acidic
a. 1
b. 3
c. 6
d. 7
e. 8
a
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A cat leaps to try to catch a bird. If the cat's jump was at 60° off the ground and its initial velocity was 2.74m/s what is the highest point of its trajectory, neglecting air resistance?
A) 0.29 m B) 0.58 m C) 10.96 m D) 0.19 m
A heat engine ________
a. converts work into heat energy b. needs a temperature difference to be able to work c. can be 100% efficient in the absence of friction d. needs electricity to be able to run
A tooth polisher on a dentist's drill reaches a speed of 1800 rpm in 8.0 s. What is its average angular acceleration?
What will be an ideal response?
Spectral Series: The Balmer series is formed by electron transitions in hydrogen that
A. end on the n = 1 shell. B. begin on the n = 1 shell. C. end on the n = 2 shell. D. begin on the n = 2 shell. E. are between the n = 1 and n = 3 shells.