Wind speed bc The faster the wind, the longer it blows, or the farther it can blow uninterrupted, the bigger the waves.
1st half-life: 100%/2 = 50%
2nd half-life: 50%/2 = 25% + 50% (from first half-life)
3rd half-life: 25%/2 = 12.5% + 75% (from first and second half-lives
I looked it up...
"A machine can decrease either the input force or the input distance needed to do a given amount of work" is the best statement that describes why a machine is useful.
Answer: Option D
<u>Explanation
:</u>
A machine is simply defined as a device that helps humans, helping them to transfer the required amount of force to compete any task, changing the direction of motion, increasing the magnitude of force to complete any task, reduce the time or distance needed to cover while performing any task.
Machines can be simple mechanical device or a combination of multiple mechanical or technical devices to reduce the amount of input force or increase the output.
Answer:
La cantidad de Ca3 (P04) 2 equivalente a 15, 4 moles es de 4774 gramos.
Explanation:
We need the weights of the elementos Ca, P and O, for calculate the weight of 1 mol:
Weight Ca=40 g
Weight P=31 g
Weight 0 = 16 g
Weight Ca3(PO4)2 = 3 x 40 g + 2 x (31 g + 4 x 16 g)
Weight Ca3(PO4)2 =310 g
1 molCa3(PO4)2---- 310 g
15, 4 mol Ca3(PO4)2-----x=(15, 4 molx 310 g)/1 mol = 4774 g
The compound sodium sulfate is made of sodium ion and sulfate ion.
The formula can be written as Na₂SO₄.
The cation present in this compound is Na⁺ and the anion is SO₄²⁻.
The compound barium sulfate is made of barium ion and sulfate ion.
The formula can be written as BaSO₄.
This compound contains the cation Ba²⁺ and anion SO₄²⁻.
From the above , we can see that both the compounds have common anion which SO₄²⁻
So, the sulfate, SO₄²⁻ is the common ion when sodium sulfate is added to a solution of barium sulfate
