Mass of a proton: 1.007825 units

Mathematics

1 answer:

Ket [755]3 years ago

4 0

Answer:

11.98661

Step-by-step explanation:

1. add up the masses of each proton and of each neutron that make up the nucleus,

2. subtract the actual mass of the nucleus from the combined mass of the components to obtain the mass defect.

1.007825 + 1.008665 = 2.01649

14.0031 - 2.01649 = 11.98661

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coffee is 7 times as old as his daughter in five years time he will be four times as old as his daughter what will be the ages I

ANEK [815]

Answer: CURRENT AGES: C = 35, D = 5 AGES IN 5 YEARS TIME: C = 40, D = 10

Step-by-step explanation:

We need to use algebra here.

Let C = Coffee's age

Let D = Daughter's age

C = 7 x D

C + 5 = 4 x (D + 5)

C + 5 = 20 + 4D

C = 15 + 4D

7D = 15 + 4D

D = 5

C = 7 x 5

C = 35

5 0

3 years ago

Vertex (0,1) x intercepts is - 1 and 1 what is the equation of the parabola?

MrRa [10]

$\bf y=a(x-{{ h}})^2+{{ k}}\\
x=a(y-{{ k}})^2+{{ h}}\qquad\qquad vertex\ ({{ h}},{{ k}})$

those are the vertex form of a parabola... so hmmm
the vertex of this one is at 0,1 and intercepts or "solutions" are at -1 and 1, so is opening downwards, notice the picture below

that means, the squared variable is the "x", thus the form is $\bf y=a(x-{{ h}})^2+{{ k}}$

now, we know the vertex is at 0,1, and two x-intercepts of $\pm 1,0$

thus $\bf y=a(x-{{ h}})^2+{{ k}}\qquad 
\begin{cases}
h=0\\
k=1\\
when
\\
x=\pm 1\\
y=0
\end{cases}
\\\\\\
\textit{so.. hmmm let us use the point ... say hmmm 1,0}
\\\\
y=a(x-{{ h}})^2+{{ k}}\implies 0=a(1-0)^2+1$

solve for "a", to see what that coefficient is, then plug it back in the vertex form equation