An experimental variable is a variable that is being tested to answer a scientific question; while a control variable is a variable that is not being altered or changed during the experiement to serve as a constant. An example of an experimental variable is plant food solution A and whether it makes a kidney bean sprout faster than plant food solution B. An example of a control variable is water, because there is no plant food mixed in to create a solution; so it will serve as a natural constant.
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Answer: Light reflects when it hits a surface.</h2>
Explanation:
It is now clear that light behaves as a wave and as a particle. It should be noted that the first to propose the <u>corpuscular theory </u>of light was <u>Issac Newton</u>, while the <u>wave theory</u> was initially proposed by <u>Christian Huygens</u>, who was contemporaneous with Newton.
Now, focusing on the corpuscular theory, <u>Newton proposed that light is composed of tiny massless particles, traveling in a straight line and at high speed.</u> In addition, he used the reflection phenomenon of the of light to show that it behaved like particles that when hitting a mirror were reflected by a perfectly elastic collision.
Compressions are the areas of high pressure while rarefractions are low pressure area
Answer: a stone thrown into a lake
Explanation:
The option that exhibits parabolic motion is a stone that is thrown into a lake.
Projectile motion is a form of motion that is seen when a particular object is thrown towards the surface fo the Earth. Such objects are acted upon by gravity.