<span> 4. 1 and 2 only.
1. the downward force is the force of gravity.
2. The upward force exerted is the Normal reaction from the floor.
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Answer: Maryam is driving her car when she glances at the temperature displayed on her dashboard. It says that the temperature is currently 78 degrees outside. This temperature is called a Sensation.
Explanation: To find the answer, we need to know more about the Sensation, perception and psychophysics.
<h3>What is sensation, perception and psychophysics?</h3>
- Sensation can be defined as the process by which the physical energy from objects in the world stimulates the sense organs.
- The process in which the brain interprets and organizes this sense of information is called, Perception.
- The branch of physics that deals with the study of how physical properties of stimuli connected with the people's experience of stimuli is called the Psychophysics.
Thus, we can conclude that, the process of sensation happens here.
Learn more about the Sensation, perception and psychophysics here:
brainly.com/question/28044944
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Answer:
A star's brightness also depends on its proximity to us. The more distant an object is, the dimmer it appears. Therefore, if two stars have the same level of brightness, but one is farther away, the closer star will appear brighter than the more distant star - even though they are equally bright!
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