Scientists always prove or disprove their explanations by?

What is two types of organelles

Three charges are located at 100-m intervals along a horizontal line: a charge of - 3.0 C on the left, 2.0 C in the middle, and 1.0 C on the right. What is the electric field on the horizontal line halfway between the - 3.0 C and 2.0 C charges?

Given the distance between the crest of one wave and the crest if the next wave, you can determine the?

n explosion breaks an object initially at rest into two pieces, one of which has 2.0 times the mass of the other. If 8400 J of kinetic energy were released in the explosion, how much kinetic energy did the heavier piece acquire

Predict sam's state of wellness if he intentionally isolates himself from other people. A. Sam is not well because he's had the flu for a week. B. Sam is not well because he's tired. C. Sam is not well because he's neglecting his social health D.

What two equations can be used to determine the speed of a wave

Which force has an infinite range and is always attractive?

A ramp with a mechanical advantage of 8 lifts objects to a height of 1.5 meters how long is the ramp

Sodium, atomic number 11, forms an ionic bond with an atom of an unknown element. What is one possible choice for the ther element in the compound?

A ship leaves the island of Guam and sails a distance 255 km at an angle 49.0 o north of west. Part A: In which direction must it now head so that its resultant displacement will be 125 km directly east of Guam?