Explain the cause of the differences in structure of LDPE, HDPE, and LLDPE
What will be an ideal response?
The structures are dependent on the amount of branching in the molecules. When the branches are long and frequent, the molecules cannot pack tightly together thus preventing crystallization. This is LDPE. When the branches are short and infrequent, the molecules can pack together and crystals can form. This is HDPE. When the structure is similar to HDPE but with slightly longer and more frequent branches, the polymers cannot pack together and the density is low like LDPE, but other properties are like HDPE, this arrangement gives LLDPE.
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Search the Internet for an animation of an electrocardiogram (EKG) being generated as a heart is beating. Draw a picture of an EKG, labeling the peaks and valleys as they correspond to the diff erent parts of the heart muscle as it contracts. Explain how you think an EKG is used to determine what part of a heart muscle has been damaged as a result of a heart attack.
What will be an ideal response?
Brakes stop the vehicle by absorbing _______ from the car
A) Moisture B) Friction C) Energy D) Vacuum
According to Pascal?s law, _____
a. pressure produced in a liquid transmits force equally in all directions b. liquids compress in the same manner as gases c. a confined liquid does not transmit pressure d. hydraulic fluid does not expand
An AND gate with inverters on each of its inputs is equivalent to a ________ gate
Fill in the blank(s) with correct word