Answer:
Explanation:
From the given information, the rise in a capillary tube h =
where:
For the height of water:
Surface Tension T = 66.2 mN/m = 66.2 N/m
θ = 10⁰
Cos θ = cos 10 = 0.985
radius r = 0,257 mm = 0.275 × 10⁻³ m
density of water = 1000 kg/m³
g = 9.8 m/s²
∴
replacing our values:
h =
h =
h = 0.0484 meteres
h = 48.3 mm
Since the height h =
r = 0.275 mm = 0.275 × 10⁻³ m
the density of mecury now
= 13593 kg/m³
the surface tension of the mercury
θ = 130⁰
Cos θ = cos 130 = -0.6428
Using the same above equation:
h =
h = -0.016494 m
h = 16.49 mm
Answer:
Vertebrae are the 33 individual bones that interlock with each other to form the spinal column.
Nitrogen is a diatomic molecule in the VA family on the periodic table. Nitrogen has five valence electrons, so it needs three more valence electrons to complete its octet. A nitrogen atom can fill its octet by sharing three electrons with another nitrogen atom, forming three covalent bonds, a so-called triple bond.
A chemical reaction (signs)
- rusting
- change in base of chemical
- for example lets say u mix two chemicals, and then it becomes a different new chemical (it changed from the inside)
a physical
- a physical reaction is outer looks not inside.
- it changes on the outside, like changing a color