It must be noted that during an elastic collision both the momentum and kinetic energy are conserved. For the kinetic energy, it can be solved through the equation,
KE = 0.5mv²
Equating the kinetic energies before and after collision,
0.5(60)(8 m/s)² = (0.5)(60)(x²) + (0.5)(0.45)(35 m/s)²
The value of x from the equation is approximately 7.40 m/s
Atomic number: 6 / the atomic number will always be the amount of electrons an element has
Element: Carbon (C)
Mass: 13 / you can find the mass by adding the protons and neutrons together
Charge: 0 or neutral / if an element has the same number of protons and electrons it will be a neutral charge
Isotope: Carbon-13 / all you do is take the element name and the mass and write the isotope like I did above
I hope this help! If you have any questions feel free to ask
B. The sound of the engine will get louder and the pitch higher.
It means water treated or supplied gaseous oxygen
The answer is a. 0.14 kg
PE = mgh
116.62 = m•(9.8)•(85)
m = 116.62/(9.8•85)
= 0.14 kg