You buy a plastic dart gun, and being a clever physics student you decide to do a quick calculation to find its
maximum horizontal range. You shoot the gun straight up,
and it takes 4.0 s for the dart to land back at the barrel.
What is the maximum horizontal range of your gun?

when heated, the valance electrons increased their speed and transferred the heat from electron to electron.   i just took the test.

myth. it was once thought that animals, including cats and dogs, could only see in black and white. however, scientists have proven this to be a myth. in all animals, including humans, the perception of colour is determined by the presence of cells in the eye called cone photoreceptors.