Answer:
The atomic weight of an atom is the sum of its protons and neutrons
Explanation:
The weight of an atom is dominated by the amount of matter contained in the dense and tiny nucleus of an atom. In the nucleus, protons and neutrons are found. Protons are massive nuclear particles that are positively charge. Neutrons are also massive and they carry no charges.
The atomic weight is given as the sum of the protons and neutrons. Electrons have little to no weight.
The focus is the place inside Earth's crust where an earthquake originates. The point on the Earth's surface directly above the focus is the epicenter. When energy is released at the focus, seismic waves travel outward from that point in all directions.
Answer:
The oil sands are a strategic resource that contributes to economic opportunity and energy security for Canada, North America and the global market. The oil sands comprise 167.2 billion barrels of crude oil – 97 percent of Canada’s 172.5 billion barrels of proven oil reserves – and are a vital part of the Canadian economy.
Source: nrcan.gc.ca
Electromagntic wave, such as an X-ray.
Explanation:
- Electromagnetic wave does not require any medium to travel. These waves propagate outwards from the source.
- They can travel even through the vacuum of outer space.
- The major source is the sun which emits radiation in the form of the Electromagnetic spectrum.
- These waves travel through oscillating electrical and magnetic fields generated by the oscillating charged particles.
- These waves oscillate in the perpendicular direction of planes concerning each other and are in form.
- Electromagnetic waves travel at speed of light.
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