How does the force of gravity affects an objects acceleration

It is advised not to hold the thermometer by the bulb while reading it

An electron and a proton are held on an x axis, with the electron at x = + 1.000 m and the proton at x = - 1.000 m. part a how much work is required to bring an additional electron from infinity to the origin? express your answer with the appropriate units. part b if, instead of the second electron coming in from infinity, it is initially at x = + 20.00 m on the axis and is given an initial velocity of 100.0 m/s toward the origin, does it reach the origin? part c how close to the origin does it come?

What is the volume of 2400kg of gasoline (petrol) if the density of petrol is 0.7g/km3