physics...

Test Preparation AP Test Preparation
1

<p>hey guys this is probably not the right time to ask this but can somebody please answer these 2 physics questions so I can check my answers? (these are 2 easy questions but I don't have an answer key so I just like to double check my answers...)</p>

<p>A service station charges a battery using a current of 6.7 A for 5.0 h. How much charge passes through the battery?</p>

<p>What is the resistance of a toaster if 120 V produces a current of 4.2 A?</p>

<p>A hair dryer draws 7.5 A when plugged into a 120-V line. (a) What is its resistance? (b) How much charge passes through it in 15 min? (Assume direct current.)</p>

<p>Thanks so much! Good luck studying for AP's everybody!</p>

2

<p>how are you planning to study for the ap physics exam? i haven’t started reviewing yet</p>

3

<ol>
<li>120600 C</li>
<li>28.57 Ohms</li>
<li>16 ohms, 6750 C</li>
</ol>

4

<p>6.7 A x (5.0h)(3600s/h) = 1.2X10^5 C</p>

<p>120V/4.2A=29 Ohm</p>

<p>a. 120V/7.5A=16 Ohm. b. 7.5A x (15min)(60s/min)=6.8x10^3 C</p>

5

<p>thanks so much again! :)</p>