Which two objects attract each other?
a.
a proton and an electron
b.
two electrons
c.
a proton and a neutron
d.
two protons

Why is there friction between objects

In which of the following cases is work being done on an object? question 2 options: pulling a trailer up a hill carrying a box down a corridor suspending a heavy weight with a strong chain pushing against a locked door

4. if you were an astronaut on the moon, what would you experience? what would you see from your perspective?