Category: Physics

What is an example of behavioral adaptation? Behavioral Adaptation: Actions animals take to survive in their environments. Examples are hibernation, migration, and instincts. Example: Birds fly south in the winter because they can find more food. Structural Adaptation: A characteristic in a plant or in an animal’s body that helps it to survive in its […]

Is a technique used to gain unauthorized access to computers? ( -p spoof ing) (n.) A technique used to gain unauthorized access to computers, whereby the intruder sends messages to a computer with an IP address indicating that the message is coming from a trusted host. Are software programs that hide their true nature using […]

Which type of mutation is the most dangerous? Frameshift mutations are generally much more serious and often more deadly than point mutations. Even though only a single nitrogen base is affected, as with point mutations, in this instance, the single base is either completely deleted or an extra one is inserted into the middle of […]

How do joints work in the body? Joints allow our bodies to move in many ways. Some joints open and close like a hinge (such as knees and elbows), whereas others allow for more complicated movement — a shoulder or hip joint, for example, allows for backward, forward, sideways, and rotating movement. Which type of […]

What happens when vinegar and baking soda is combined? When baking soda is mixed with vinegar, something new is formed. The mixture quickly foams up with carbon dioxide gas. If enough vinegar is used, all of the baking soda can be made to react and disappear into the vinegar solution. Sodium bicarbonate and acetic acid […]

Which ocean has lowest salinity? The Arctic Ocean’s Can you get salt from the ocean? From the Ocean to the Kitchen One gallon of water yields anywhere from half a cup to a full cup of salt, depending on its salinity. Almost any container will do, including plastic jugs, glass bottles and coolers. Why the […]

What is the formula for tension force? The tension on an object is equal to the mass of the object x gravitational force plus/minus the mass x acceleration. What does negative stress indicate? Compressive stress has stress units (force per unit area), usually with negative values to indicate the compaction. However, in geotechnical engineering, compressive […]

How does the human eye use refraction? Light entering the eye is first bent, or refracted, by the cornea — the clear window on the outer front surface of the eyeball. The lens focuses the light on the retina. This is achieved by the ciliary muscles in the eye changing the shape of the lens, […]

What is an example of content validity? For example, you might have a ten-question customer satisfaction survey with three questions that test for “overall satisfaction with phone service.” Testing those three questions for satisfaction with phone service is an example of checking for internal consistency; taking the whole survey and making sure it measures … […]

What does the bottom of a swimming pool or tank of water appear to be raised? This is due to the refraction. This is because as the light rays transition and pass through the air-water interface, they get bent due to refraction. The light rays are bent away from the normal making us perceive the […]