How many atoms are in one molecule of Na2SO4?
A) 7
B) 2
C) 4
D) 3
E) 24
Answer: A
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If the first maximum of one circular diffraction pattern passes through the center of a second diffraction pattern, the two sources responsible for the pattern will appear to be a single source
Indicate whether the statement is true or false
The four fundamental forces in nature are the __________, __________, __________, and __________
Fill in the blank(s) with correct word
During the volcanic eruption of Mt. Pelee in 1902, an incredibly hot "burning cloud" rolled down the mountain and incinerated the town of Saint-Pierre. From the damage done, the temperature in the cloud was estimated at 700°C. If the air temperature
was 20°C and a mole of air is 29 grams, estimate the molecular weight of the gas in the "burning cloud" that made it heavier than the surrounding air. (As a follow-on, estimate the most probable composition of the cloud. Some typical volcanic gases are H2S, SO2, H2SO4, CO2, NO.)
Mass on a Spring: In a supermarket, you place a 22.3-N (around 5 lb) bag of oranges on a scale, and the scale starts to oscillate at 2.7 Hz. What is the force constant (spring constant) of the spring of the scale?
A. 650 N/m B. 600 N/m C. 330 N/m D. 820 N/m E. 410 N/m