I want to examine the surface of a planet that is covered by a thick atmosphere (which includes oxygen and contains a very thick layer of water clouds that never clears). What wavelength of electromagnetic radiation would I be smartest to use: radar waves.
Radars send out electromagnetic waves much like wireless computer networks and cell phones. The signals are despatched out as short pulses which can be reflected by objects of their route, in part reflecting returned to the radar.
The radio waves travel outward from the antenna at the velocity of light (186,000 miles or three hundred,000 km in keeping with the second) and keep going until they hit something.
Then some of them bounce back in the direction of the antenna in a beam of contemplated radio waves also visiting at the speed of light. the speed of the waves is crucially vital.
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An object becomes negatively charged when It gains electrons. Option A is correct.
<h3>What is an atom?</h3>
The atom consists of matter that may be split without releasing electrical charges.
It's also the smallest unit of matter with chemical element features. As a result, the atom is the fundamental unit of science.
In the nucleus proton and the neutron is exists. The condition of the atom to be electrically neutral is that the number of the proton and electron should be the same.
An object becomes negatively charged when It gains electrons. Because the electron is a negative cahrge particle.
Hence, option A is correct.
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<h3><u>Answer;</u></h3>
They are anions.
<h3><u>Explanation</u>;</h3>
- Polyatomic ions are the ions that contain 2 or more different atoms that are covalently bonded to each other.
- Examples include; Nitrate : NO₃⁻, Sulfate : SO₄²⁻,Hydroxide : OH⁻, and Phosphate : PO₄³⁻, etc.
- Polyatomic ions are tightly bound group of atoms that has a positive or negative charge and behaves as a unit.
What surprises me about ancient beliefs systems is how they different point of views
Using the kinematics equation vf = vi + at we plug in all known values 15 = 5 + a*1 solving for a we get 10m/s^2