An individual oxygen atom has 16 times the weight of an individual hydrogen atom. What is the weight ratio of oxygen to hydrogen in water?
A) 1 part oxygen to 16 parts hydrogen
B) 1 part oxygen to 2 parts hydrogen
C) 1 part oxygen to 8 parts hydrogen
D) 8 parts oxygen to 1 part hydrogen
E) 16 parts oxygen to 1 part hydrogen
D
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A rectangular loop of wire of width 10 cm and length 20 cm has a current of 2.5 A flowing through it. Two sides of the loop are oriented parallel to a uniform magnetic field of strength 0.037 T,
the other two sides being perpendicular to the magnetic field. The magnitude of the torque on the loop is A) 0.0093 m?N. B) 0.025 m?N. C) 0.050 m?N. D) 0.0019 m?N. E) 0.038 m?N.
An ultraviolet light wave has a wavelength of 300 nm and speed of 1.8 × 10^8 m/s through a transparent medium. What is the frequency of this wave in the medium? (1 nm = 10-9 m and c = 3.00 × 10^8 m/s)
a. 7.0 × 10^14 Hz c. 6.3 × 10^2 Hz b. 6.0 × 10^14 Hz d. 10 × 10^14 Hz
The figure shows a distance vs. time graph of an object with three distinct regions, I, II, and III
?
The object’s velocity is zero in region(s)
a.
I.
b.
II.
c.
III.
d.
no regions
The fusion of Li and N results in creation of
A) O and no energy transformed to other forms. B) He and energy transformed to other forms. C) He and no energy transformed to other forms. D) salami and cheese sandwiches. E) O and energy transformed to other forms.