Galaxies may have been shaped by collisions or the gravitational pull of other galaxies.
a) spiral
b) irregular
c) elliptical
d) barred spiral

Gravity bc it’s gravity

The car would move to the right with 150 n of force. the 150 n of force from friction and air resistance slows the car from moving to the right with 300 n of force.

Because its reliable.   there is no pollution  the chances of a radiation leak is low

The answer is  the potential energy of the bob at position b is 1.47 joules.if the maximum height of the bob is 0.45 meters when it swings back,1.323   joules of energy was transformed to thermal energy.hope this