A 100-W driveway light bulb is on 10 hours per day. Assuming the power company charges 10 cents for each kilowatt-hour of electricity used, estimate the annual cost to operate the bulb
A) $3.65
B) $7.30
C) $21.40
D) $36.50
E) $73.00
D
Physics & Space Science
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In the periodic table, symbols for the elements are arranged according to _____
a. size b. charge c. mass number d. atomic number e. electronegativity gradient
Physics & Space Science
When white light disperses as it passes through a prism, which of the following colors moves at the lowest speed in the prism?
a. blue b. green c. yellow d. red
Physics & Space Science
A 340-g air track cart traveling at 1.25 m/s suddenly collides elastically with a stationary 300-g cart. What is the speed of the 300-g cart just after the collision?
A) 0.0781 m/s B) 1.33 m/s C) 0.625 m/s D) 1.25 m/s E) 0.664 m/s
Physics & Space Science
The process in which atoms lose or gain electrons is referred to as _____
A) ionization B) the Doppler effect C) a redshift D) collimation
Physics & Space Science