The plasma membrane of a cell is a network of lipids and proteins that forms the boundary between a cell’s contents and the outside of the cell. It is also simply called the cell membrane. The main function of the plasma membrane is to protect the cell from its surrounding environment. It is semi-permeable and regulates the materials that enter and exit the cell. The cells of all living things have plasma membranes.

Stars form from an accumulation of gas and dust, which collapses due to gravity and starts to form stars. The process of star formation takes around a million years from the time the initial gas cloud starts to collapse until the star is created and shines like the Sun. Stars form inside relatively dense concentrations of interstellar gas and dust known as molecular clouds. ... Star formation begins when the denser parts of the cloud core collapse under their own weight/gravity. These cores typically have masses around 104 solar masses in the form of gas and dust.

1. Assets and expenses are very different elements of the financial statements of an entity. Assets are any resource that is owned or controlled by an entity and gives value to the entity either by aiding production of goods/services or by having a fixed monetary realization . Also most assets appear in the Balance sheets for a comparatively longer period.They also suffer diminution in value (except certain assets) Eg. Building, Debtors.
2. Expenses on the other hand are usually outflows of cash of an enterprise in order to obtain an asset or settle a liability. Expenses mostly appear in the Financial Statements in the year they're incurred (except capital expenditure and deferred revenue expenditure).It can also be defined as the cost of doing business.

Human geography consists of a number of sub-disciplinary fields that focus on different elements of human activity and organization, for example, cultural geography, economic geography, health geography, historical geography, political geography, population geography, rural geography, social geography. Human geography is a wide-ranging discipline that draws together many of the strands important for understanding the world today. It examines human societies and how they develop, their culture, economy and politics, all within the context of their environment.

The Roman style of history was based on the way that the Annals of the Pontifex Maximus, or the Annales Maximi, were recorded. The Annales Maximi include a wide array of information, including religious documents, names of consuls, deaths of priests, and various disasters throughout history. Titus Livius, commonly known as Livy, was a Roman historian best known for his work entitled Ab Urbe Condita, which is a history of Rome "from the founding of the city". He was born in Patavium, which is modern day Padua, in 59 BC and he died there in 17 AD. The Lasting Contributions of Rome. During the early years, Rome was a republic where Roman citizens elected their leaders and created a senate. Branches of the government were balanced in power. This was one of Rome's first attempts at democracy.

Dimensional analysis for formula of frequency of oscillating liquid drop.
r= radius = [L].
d= p= density = [M ][L^-3]
S = Surface Tension = [M T^-2]
n = frequency = k* r^a * p^b * S^c.
So [T^-1] = [M^b+c] [L^a-3b] [T^-2c]
Equating powers: a = -3/2. b= -1/2. c=1/2.
Answer: n = k* sqrt(S/(p*r^3))
Or n = k* sqrt (S/m).
m = mass of the drop.

Inventory (American English) or stock (British English) is the goods and materials that a business holds for the ultimate goal of resale (or repair).  In the context of services, inventory refers to all work done prior to sale, including partially process information. Inventory is the collection of unsold products waiting to be sold. Inventory is listed as a current asset on a company's balance sheet. 

In essence, a nebula is formed when portions of the interstellar medium undergo gravitational collapse. ... From this, stars may form in the center of the collapsing material, who's ultraviolet ionizing radiation causes the surrounding gas to become visible at optical wavelengths. A nebula is a giant cloud of dust and gas in space. Some nebulae (more than one nebula) come from the gas and dust thrown out by the explosion of a dying star, such as a supernova. Other nebulae are regions where new stars are beginning to form. For this reason, some nebulae are called "star nurseries."

Accounting is the process of recording financial transactions pertaining to a business. The accounting process includes summarizing, analyzing, and reporting these transactions to oversight agencies, regulators, and tax collection entities. Accounting is the process of systematically recording, measuring and communicating information about financial transactions. The three major financial statements produced by accounting are the profit and loss statement, the balance sheet and the cash flow statement. There are mainly three types of accounts in accounting: Real, Personal and Nominal accounts, personal accounts are classified into three subcategories: Artificial, Natural, and Representative.