Which of the following methods of improving air quality does not require advanced technology?

Three balloons are inflated to the same size. The three balloons are submerged in buckets filled with ice water, tap water and water heated to 65°C. What results would you expect from this experiment?

What keeps the hydrogen atoms together in the molecule?

What would happen if you added energy to solid bar of gold?

A ripe acorn falls down from a branch with an initial velocity v0 = 0. The acorn's vertical displacement until it hits the ground (neglecting the effects of air) could be derived using

Identical cannonballs are fired with the same force, one each from four cannons having respective bore lengths of 1.0 meter, 2.0 meters, 2.5 meters and 3.0 meters.

Chemical bonds are formed from the attractive force of atoms for electrons. What is the force called?

How resistance, current, and voltage behave in a series circuit.?

A father racing his son has 1/3 the kinetic energy of the son, who has 1/2 the mass of the father. The father speeds up by 1.4 m/s and then has the same kinetic energy as the son. What are the original speeds of (a) the father and (b) the son

An element cannot be dived into smaller parts

A pelican dives downward from a height of 35 m with an acceleration of 9.8 m/s² to grab a sardine at the surface of the ocean. How long does the dive take? OA) 0.75 s OB) 1.9 s OC) 2.7 s OD 7.1 s