Answer:
D.
Explanation:
According to the law of reflection, angle of incidence is equal to the angle of reflection when a ray of light falls at a smooth surface and reflected. This law of reflection is also followed by waves of water as well.
If a beam of flashlight is allowed to reflect from a mirror and waves of water being reflected off the side of a swimming pool, both will follow the above law of reflection,<em> it means the angle at which wave and light will strike (angle of incidence) will be equal to the angle at which wave and light will reflect (angle of reflection).</em>
It can be concluded that angle of strike (angle of incidence) is the angle of reflection (angle of reflection).
Hence, the correct answer is D.
I'm strongly going with A on this one. I am 95% sure.
Hope it helped!
Answer:a. A timer to signal how long to brush teeth
Explanation:
Stimulus control of behavior occurs when the performance of a particular behavior is controlled by the presence or absence of a discriminative stimulus. For example, the presence of a stop sign (a discriminative stimulus) at a traffic intersection increases the probability that "braking" behavior will occur.
The chemicals, neurotransmitters are released to carry a nerve impulse which is an electric signal transmitted by the nervous system. This impulse transmitted from one neuron to another. Examples of neurotransmitters are serotonin in which scientists thinks that a low level of this is one of the causes of depression.
The difference in air pressure.