Answer:
b) 16 cm
Magnification, m = v/u
3 = v/u
⇒ v = 3u
Lens formula : 1/v – 1/u = 1/f
1/3u = 1/u = 1/12
-2/3u = 1/12
⇒ u = -8 cm
V = 3 × (-8) = -24
Distance between object and image = u – v = -8 – (-24) = -8 + 24 = 16 cm
Explanation:
Speed of a radio wave in vacuum/air is 3x10^8 m/s. so, if speed is also distance/time, then time = distance/speed = 400,000/300,000,000 = ????
Darker colors absorb heat, While lighter colors don't. If a house is painted black in Arizona, The black color will absorb the heat making the temperature inside the house very hot even with the AC on. If a house in Arizona is painted White, The heat will bounce off the White color, making the temperature inside the house cooler.
Hope this helps!
Answer:
0.51 m
Explanation:
from the question we are given the following
weight of the crate = 36 N
weight of the plank = 21 N
distance of of the balance from the left end = 0.3 m
from the diagram attached, CG is the center of gravity ( the point near or within a body through which its weight can be assumed to act ), taking the CG as where the weight of the plank acts and it being at a distance L from the support
we can find the distance of the center of gravity just as we would find the moment about the support balance
therefore
36 x 0.3 = 21 x L
10.8 = 21L
L = 0.51 m
The center of gravity is 0.51 m to the right of the support.
The equation of the last question which is 3CO2 + 4H2O has a total of 21 atoms with the following number of atoms of each element:
C= 3
C= 3H = 8
C= 3H = 8O = 10.
<h3>What is a chemical formula?</h3>
A chemical formula is defined as the expression that is used to show the chemical symbol of and element in a chemical compound and the number of atoms of those elements.
There are three main type of formula that include the following:
- Empirical formula : This is the type of chemical formula that shows the simplest whole-number ratio of atoms in a compound.
- Molecular formula: This is the type of chemical formula that shows the number of each type of atom in a molecule.
- Structural formula: This is the type of chemical formula that shows how this atoms of each element are bonded together.
The given chemical formula above is a molecular formula that contains the following number of atoms per elements:
C= 3
C= 3H = 8
C= 3H = 8O = 10. Which is a total of 21 ( green)
Learn more about chemical formula here:
brainly.com/question/26388921
#SPJ1
