An electric device delivers a current of [tex]$15.0 A$[/tex] for 30 seconds. How many electrons flow through it?
Answer (2)
A. Plural Forms of Nouns:
fairy - fairies
thief - thieves
knife - knives
loaf - loaves
watch - watches
butterfly - butterflies
shelf - shelves
lady - ladies
mango - mangoes
church - churches
puppy - puppies
roof - roofs
B. Fill in the blanks with plural forms:
The ox pulled the cart. The oxen pulled the carts .
The child is playing with a ball. The children are playing with some balls .
There is a mouse in the house. There are some mice in the houses .
The goose is swimming in the pond. The geese are swimming in the ponds .
The wolf attacked the sheep. The wolves attacked the sheep .
Note: "Sheep" remains the same in singular and plural form.
There was a puppy in the kennel. There were many puppies in the kennels .
The fisherman cast their net in the sea to catch fish. The fishermen cast their nets in the sea to catch fish .
Note: "Fish" can be both singular or plural without change.
A current of 15.0 A for 30 seconds results in a total charge of 450 Coulombs. This charge corresponds to approximately 2.81 × 1 0 21 electrons flowing through the device. To find this, we related the current to charge and used the charge of a single electron for the calculation.
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