Consider the following properties. i) the temperature (in ◦c) at which ice melts ii) the color (green) of nickel chloride iii) the energy (in kj) produced when gasoline burns iv) the cost (in $/gal) of gasoline v) the price (in $/g) of platinum vi) the humidity (in %) of the atmosphere vii) the air pressure (in psi) in a tire viii) the hardness of concrete

what are the statements? x

what is the speed of a softball that travels 20m in 2secs

speed = 20/2 = 10 m/s

what experimental evidence led scientists to change from the previous model to this one?

a few of the positive particles aimed at a gold foil seemed to bounce back.

the colors of light emitted from heated atoms had very specific energies.

experiments with water vapor showed that elements combine in specific proportions.

cathode rays were bent in the same way whenever a magnet was brought near them.

the order for strong to weak forces such as

strong nuclear force → electromegnetic force → weak nuclear force → gravitational force

the fundamental forces are those forces that act between to objects or element to make interactions. there are four types of fundamental forces such as strong and weak nuclear forces (due to protons and electrons), electromagnetic force (due to the motion of electrons) and gravitational force (due to orbital movement of the planet). if these forces are arranged on the basis of their maximum strength then the order is

strong nuclear force → electromegnetic force → weak nuclear force → gravitational force