Answer: Black holes, sun, stars, neutron stars
Explanation:
Answer:
X - Rays
Explanation:
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Sound waves, water waves, and light waves all spread out from a source and can transfer energy without transporting matter. They obey the principle of superposition and can be reflected, refracted, and diffracted. Examples also in many practical scenarios support the concept.
All sound waves, water waves, and light waves share some common properties as they are all types of wave motion. These waves all spread out from a source and can transfer energy without transporting matter. They also follow the principle of superposition, where the resultant wave amplitude is the sum of the individual wave amplitudes. Additionally, they can be reflected, refracted, and diffracted.
For example, when throwing a pebble into a pond, the water waves spread out in rings from where the pebble was dropped (the source). The waves transfer the energy of the impact through the water, yet the water molecules themselves don't travel in the direction of the wave's motion—they merely move up and down.
The same principles apply to sound waves and light waves, though the type of energy transferred and the manner in which they're affected by the medium they're passing through can differ.
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Answer:
The definition of a regular shape is that all the sides are equal and all the inside angles are equal. An irregular shape doesn't have equal sides or equal angles.
Explanation:
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B. where gas molecules can be exchanged between Earth's atmosphere and outer space.
C. where air temperature stops increasing with altitude and starts decreasing.
D. closest to the Earth's surface.
B. Direct current always moves from the positively charged terminal to the negatively charged terminal.
C. Alternating current always moves from the positively charged terminal to the negatively charged terminal.
D. The flow of an alternating current switches direction when a generator's terminals change its charge.
Answer: D. The flow of an alternating current switches direction when a generator's terminals change its charge.
Explanation: I JUST TOOK THE PF EXAM AND GOT IT CORRECT!!!