A 500-W heater carries a current of 4.0 A. How much does it cost to operate the heater for 30 min if electrical energy costs 6.0 cents per kWh?
a. 1.5 cents
b. 9 cents
c. 6.0 cents
d. 0.042 cents
e. 30 cents
a
Physics & Space Science
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A(n) ____________________ supernova is caused by the collapse of a massive star that has lost its outer envelope of hydrogen
Fill in the blank(s) with correct word
Physics & Space Science
The astronomical object in our sky which plays the most fundamental role in our lives is the
A) Sun B) Moon C) nearest star D) most massive planet in our solar system, Jupiter
Physics & Space Science
Heavy atoms are not appreciably larger in size than light atoms because the nuclei of heavy atoms have more
A) mass. B) electric charge. C) nucleons. D) all of the above E) none of the above
Physics & Space Science
Epidemiology is used to perform what function of public health?
What will be an ideal response?
Physics & Space Science