Ican't find this answer anywhere, so i'll ask here: what item did they base the si unit of mass (grams) off of? (in other words, to what object did they say "hey, lets make this equal 1 gram and then go from there"

While you are driving in the lane next to the curb on a multi-lane road the car on your left suddenly moves toward you lane. they are about toy crash into your front fender. you

Which compound is held together by the electrostatic force between two ions? a. co2 b. cci4 c. h2s d. mgf2

When the displacement of a mass on a spring is 12a the half of the amplitude, what fraction of the mechanical energy is kinetic energy? at what displacement, as a fraction of a, is the mechanical energy half kinetic and half potential?