Which two objects in space formed from the huge disk of ice and debris beyond the outer planets? A. Pluto and comets B. comets and Neptune C. Neptune and a solar nebula D. a solar nebula and planetesimals

Considering only the earth's rotation, determine how much later the asteroid would have had to arrive to put the explosion above helsinki at longitude 25˚ e? this would have obliterated the city.

Ahanging spring stretches by 35.0 cm when an object of mass 450 g is hung on it at rest. in this situation, we define its position as x = 0. the object is pulled down an additional 18.0 cm and released from rest to oscillate without friction. what is its position x at a moment 84.4 s later? express your answer in cm.

Give one example to show that when substances are mixed,it may result in a chemical or a physical change depending on the conditions.