the measure of how many a wave passes on a certain point in a certain time is
frequency
i think you should multiply them, the speed is 12 * 3 = 36 m/s
Answer:
<h3>The answer is 2122.73 g</h3>
Explanation:
The mass of a substance given it's molar mass and number of moles can be found by using the formula
mass = Molar mass × number of moles
From the question
molar mass = 283.03 g/mol
number of moles = 7.5 mol
So we have
mass = 283.03 × 7.5 = 2122.725
We have the final answer as
<h3>2122.73 g</h3>
Hope this helps you
<h2>Right answer: 2i + 2j and -2i − 2j </h2>
The coordinates of a resulting vector are calculated by <u>algebraically adding the respective components of the vectors</u>.
In other words: to sum two vectors we only have to sum, respectively, the components <em>i</em> and the components <em>j</em> of each vector.
For example, the pair of vectors 2i + 2j and -2i − 2j:
2i + (-2i) = 0i
and
2j + (-2j) = 0j
Then, the resultant is:
0i + 0j
Therefore, the correct option is c.
If we try with the other options, the resultant will<u> not</u> be 0i + 0j:
a. 0i + 0j and 2i − 2j:
2i-2j
b. 2i + 2j and 2i − 2j:
4i-0j
d. 2i + 0j and 0i + 2j:
2i+2j
D I think opposite is negative towards positive if I remember