Yes, the data from mass spectrometry has helped modern scientists to make modifications to Dalton's model.
Dalton's model consisted of a single atom and that basically the atom is the smallest object. At the time, no discovered what are inside of atoms.
Atoms are made up of small particles, protons, neutrons and electrons. A mass spectrometer is an instrument that is able to see what is inside an atom. With this item, scientists have proved that atoms are not the smallest in the world cause the objects in them are smaller.
Answer:
Explanation: Description - The person is sitting with other students in psychology class holding a pen and writing some notes on his paper. He is also listening attentively as he is leaning forward and nodding as the professor is presenting a fact or concept.
Explanation - You are sitting in the psychology class amidst many other things you could be doing because of multiple reasons. It could be that you are in pursuit of understanding human behavior, being a psychologist is your childhood dream or you want to follow the footsteps of your parents who are also psychologists. Again, there are numerous reasons that a person may have to sit inside the class in psychology.
Prediction - It can be predicted that given a class of 30 students, at least a number might have a failing mark if those few are continuously not attending class, or showing no interest in the subject. Psychology might be hard for some especially those who are not studying.
Influence - To influence people who might be interested in sitting in the psychology class might to show how interesting psychology is by providing practical applications for the subjects that may include, understanding mental disorders, determining if the person is telling the truth or predicting human behavior in a poker game.
Identity process<span> theory proposes that adjustment to aging can be conceptualized as involving the three </span>processes<span> of identity assimilation (maintaining </span>self<span>-consistency), identity accommodation (making changes in the </span>self<span>), and identity balance (maintaining a sense of </span>self<span> but changing when needed.)</span>
Answer:
79 1/6 m
Explanation:
Perimeter of a rectangle = 2(length + width)
Length = 73/3 ; width = 61/4
Therefore.
Perimeter = 2(73/3 + 61/4)
Perimeter = 2(292 + 183) / 12
Perimeter = 2(475/12)
Perimeter = 950/12
Perimeter = 79 2/12
Perimeter = 79 1/6 m
Protective systems are methods of protecting workers from cave-ins of material that can fall or roll into an excavation, or from the collapse of nearby structures. As mentioned in earlier chapters, if an excavation is less than 5 feet deep, OSHA does not require a protective systems unless the competent person sees signs of a potential cave-in. (It is important to remember that a wall collapse in a trench four and 1/2 feet deep can still have serious results!) For trenches between 5 feet and 20 feet deep, shoring and sheeting, shielding, sloping and benching are all acceptable protective measures. It is up to the planners of the construction project and the competent person on site to determine which systems will work best. If an excavation is greater than 20 feet deep, a registered professional engineer must design the protective system.
Shoring systems are structures of timber, mechanical, or hydraulic systems that support the sides of an excavation and which are designed to prevent cave-ins.Sheeting is a type of shoring system that keeps the earth in position. It can be driven into the ground or work in conjunction with a shoring system. Driven sheeting is most frequently used for excavations open for long periods of time. Another type of sheeting, in which plates or shoring grade plywood (sometimes called Finland form) is used in conjunction with strutted systems such as hydraulic or timber shoring. These strutted systems are also referred to as active systems. The most frequently used strutted system involves aluminum hydraulic shoreswhich are lightweight, re-usable and installed and removed completely from above
