first one, nerve cells are used to send messages from different parts of the body to the brain.
Answer
Ultraviolet
Explanation
The types of radiation and their wavelength are:
Gamma < 10⁻¹² m
X-rays 1 nm - 1 pm
Ultraviolet 400 nm - 1 nm
Visible 750 nm - 400 nm
Near-infrared 2.5 μm - 750 nm
Infrared 25 μm - 2.5 μm
Microwaves 1 mm - 25 μm
Radio waves > 1 mm
Hence, the given wavelength of 2.86 X 10⁻⁸ m corresponds to Ultraviolet.
What’s the question cuz I’m confused lol
Answer:
3.17mol
Explanation:
moles of Na = m/M ; Where M - molar mass of Na which is 23
moles of Na = 73/23 =3.17mol
but from the eqn n(Na) : n(NaOH) = 2:2 = 1:1
: . moles of NaOH is also 3.17mol
Burning wood
Burning<span> is a non-reversible </span>chemical change<span>. When you </span>burn wood<span>, the carbon in the </span>wood<span> reacts with oxygen in the air to create ash and smoke, and energy in the form of light and heat. This is a permanent </span>change<span> that cannot be undone – you cannot turn ashes back into </span>wood<span>.</span>