Answer:
It might the nucleus
Explanation:
Because proton and neutron are both in the nucleus of an atom.
I believe it’s D because phosphorus has the mass of 30.9.
Answer:
8 liters of the first salt solution and 12 liters of the second salt solution is needed to get 20L of a solution that is 30% salt
Explanation:
Let x represent the liters of the first salt solution
Let y represent the liters of the second salt solution
x + y= 20......equation 1
x= 20-y
The first solution is 20% salt and the second solution is 45% salt
20/100x + 45/100 y= 30/100 × 20
0.2x + 0.45y= 0.3×20
0.2x + 0.45y= 6............equation 2
Substitute 20-y for x in equation 2
0.2(20-y) + 0.45y= 6
4-0.2y+ 0.45y= 6
4 + 0.25y= 6
0.25y= 6-4
0.25y= 2
y= 2/0.25
y= 8
Substitute y for 8 in equation 1
x + y= 20
x + 8=20
x= 20-8
x= 12
Hence 8 liters of the first salt solution and 12 liters of the second salt solution is needed to get 20L of a solution that is 30% salt.
Need the image to determine the strength and polarity of the charges in the corners.
using kqq/r^2 and basic geometry to figure out magnitude of electric field at point O
Speed = frequency x wavelength
So rearrange the formula: wavelength= speed/ frequency
wavelength = (2.998 x 108) ÷ (5.10 x 1014)
