<span>According to the three laws of planetary motion, planetary orbits are in the shape of an "Ellipse"
In short, Your Answer would be Option B
Hope this helps!</span>
First we will find the speed of the ball just before it will hit the floor
so in order to find the speed of the cart we will first use energy conservation



So by solving above equation we will have

now in order to find the momentum we can use



Yes because mercury has more protons and electrons that tin. (30 more)
a,b,c is your answer light and sound are not considered matter and heat is energy created from matter and electricity is particles moving basically therefore electricity is matter hope this helps