The element Krypton was discovered in London on May 30th 1898 by Sir William
Ramsay. The name Krypton comes from the Greek word that means hidden, Kryptos.
Humans like to use this element for photography, florescent lights measurem
Vibration and Wave
A wiggle in time is a vibration. A
wiggle in space and time is a wave.
How often a vibration occurs is
described by its frequency. The unit of frequency is
Frequency = 1/ period
Period= 1/ frequency.
Wave speed= wa
A vector quantity is a quantity that has both magnitude and
direction. Examples of vector quantities
are, velocity and direction because they
both have magnitude and direction. A
scalar quantity is a quantity that has
Electrostatics in energy at rest.
Like charges repel: opposite charges attract.
Columbs law=G m1 m2/d2
G= is the universal gravitational constant
The Si unit of charge is coulomb
An electric field fills the space around