An electric device delivers a current of [tex]$15.0 A$[/tex] for 30 seconds. How many electrons flow through it?
Answer (2)
The device delivers a total charge of 450 coulombs when a current of 15.0 A flows for 30 seconds. This results in approximately 2.81 x 10^21 electrons flowing through the device. To find this, the formula relating current, time, and charge is used, alongside the charge of a single electron.
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a. Choose the correct answer.
i. What kind of cookies did Lily bake?
The correct answer is 'chocolate chip'. In the passage, it says that Lily baked a batch of delicious chocolate chip cookies.
ii. Where did Lily look for the missing cookie?
The correct answer is 'under the table, behind the couch and in the fridge'. In the story, when Lily noticed a cookie was missing, she searched these places to find it.
iii. Who did John think took the cookie?
The correct answer is 'the family dog'. John giggled and pointed at the family dog, Max, suggesting that Max might have been the one who took the cookie.
iv. Who was the real culprit?
The correct answer is 'a bird'. The passage concludes that a bird was seen on the windowsill enjoying the last bite of the stolen cookie, indicating that the bird was the real culprit.
To summarize: Lily, a curious little girl, baked chocolate chip cookies and discovered one was missing. She searched under the table, behind the couch, and in the fridge for the missing cookie. Initially, her brother John thought their family dog, Max, took it. However, the real culprit turned out to be a bird that was caught enjoying the last bite of the cookie.
