Using a resistor and two different value capacitors, which of the following combinations in an RC circuit would give the greatest time constant?
a. the resistor in series with both capacitors in series with each other
b. the resistor in series with the lower value capacitor
c. the resistor in series with the larger value capacitor
d. the resistor in series with both capacitors in parallel with each other
D
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A gold-plated (gold-covered) piece of jewelery, such as a bracelet, is
a. a compound. b. a heterogeneous mixture. c. a homogeneous mixture. d. an element.
Limestone may be made up of
A) fragments of granitic and andesitic rocks. B) animal bones. C) shell fragments from marine animals. D) plant debris.
A protostar develops a bipolar flow of gas when it is still surrounded by an equatorial disk of ________
Fill in the blank(s) with correct word
What best describes what happens when an acid such as HCl is mixed with water?
A) The proton chemically bonded to the chlorine is transferred to a water molecule and forms a chloride ion and a hydronium ion. B) A proton from the chlorine nucleus is ejected and captured by a water molecule to form a negatively charged HCl and a new hydronium ion. C) A hydroxide ion from the water is transferred to the HCl molecule to form a proton and hydronium ion. D) HCl is not an acid. E) none of the above