What is upthrust? name the factor that affect the upthrust.

The upthrust keeps a ship afloat. The upthrust keeps swimmers on top of the water. Things weigh less in water.

The upward force exerted on a body by the fluid in which the body is submerged is called the upthrust or buoyant force. The property of liquid to exert an upward force on a body immersed in it is called buoyancy. Being a force upthrust is measured in newton or kgf in the system of international units. Examples Pushing an empty can into water experiences the buoyant force. Pushing a cork into water into water experiences the buoyant force. Reason for Upthrust The thrust ating on on the sides of walls of the body get neutralised because they are equal in magnitude and opposite in the directions. There is a pressure difference between the lower and upper faces of block. Since force is the product of pressure and area, The difference in pressure due to liquid is on th two faces of causes a net upward force called upthrust on the body immersed in the fluid.

upthrust an upward force exerted by a fluid that opposes the weight of an immersed object.It is the force that pushes an object up. ... the upward force that a liquid or gas exerts on a body floating in it.

When a body is placed in water, Up thrust = V x d x g

From the above formula we can say that the following are the factors that affect up thrust:

Acceleration due to gravity - (g)

Density of the liquid - (d)

Volume of the body submerged in the liquid - (V), or volume of the liquid displaced (v)

Explanation:

assuming that your periodic table has eighteen columns, you should highlight   the four elements in the third column from the left of the table.

neutral atoms of elements after calcium contain d electrons. the energy of d orbitals of a particular main shell lies between the energy of the s and p orbitals of the next main shell. for example, electrons in the have energy higher than those in the orbital while lower than those of the orbital.

by the aufbau principle, electrons fill orbitals one at a time, starting from those of the lowest energy. the orbital is therefore filled right after orbitals and before orbitals.  

potassium has electron configuration and calcium . the s orbital of a main shell holds a maximum of two electrons. the next element would thus have the electron configuration and satisfy the requirements.

a neutral atom of the element contains three electrons on top of the most recent noble gas element. it should thus be placed in the third column of the periodic table. both scandium and yttrium would satisfy the conditions. an aufbau diagram indicates that the 4f orbital is filled before the 5d. however, it appears that exceptions exists for both lanthanum and actinium. neutral atoms of the two d-block elements also demonstrate the and should be highlighted as well.