They are the very bases of life, no life would exist without cells
Answer:
Keepers also have a useful safety function, as they stop external metal being attracted to the magnet. ... A keeper for low-coercivity magnets is just a strong permanent magnet that keeps all the domains pointing the same way and realigns those that may have gone astray.
Amount of matter in object is mass.density is mass/volume.h2o is water.drew first picture of atom is Neil's Bohr.l* w* h is volume.basic unit of matter is atom.mixture is concrete.n=1 is inner shell.upward force of a liquid on an object is buoyancy.
Answer:
a bowling ball placed on the top shelf of a closet.
Explanation:
Potential energy is the energy that is stored in an object due to its position relative to some zero position. An object possesses gravitational potential energy if it is positioned at a height above (or below) the zero height.
Mathematically,
Potential energy, PE = M × g × h
Answer:
k = 2.45
Explanation:
It is given that,
Charge acquired on each plate of the capacitor due to a battery, 
If V is the potential difference across the plates, capacitance in air is given by :
.............(1)
Let k is the dielectric constant of the dielectric slab. While the battery connection is maintained, a dielectric slab is inserted into and fills the region between the plates. This results in the accumulation of an additional charge of 220 µC on each plate.
New charge becomes, 
.............(2)
The dielectric constant of the dielectric slab is given by :
k = 2.45
So, the dielectric constant of the dielectric slab is 2.45. Hence, this is the required solution.
