Windmill energy transformation

If two protons and two neutrons are removed from the nucleus of an oxygen atom, a nucleus of which element remains?

A spring has a spring constant of 100 N/m, and the mass hanging from is is 0.71 kg. What is the period of the spring's motion? answers are in metres per second: A) 1 B) 0.031 C) 0.44 D) 0.53

A fluid must be liquid and not any other state of matter. true or false?

Your hair grows at the rate of 0.0330 mm/hr. What is the rate of your hair growth in ft/year?

Classify the following substances as acidic, basic, or neutral: a. a soapy solution, pH = 9 b. a sour liquid, pH = 5 c. a solution with four times as many hydronium ions as hydroxide ions

The study of how sound behaves in rooms and buildings

What colors of light are absorbed by hydrogen gas

What variables affect the acceleration of an object and in what matter do they affect the acceleration?

Max (15 kg) and Maya (12 kg) are ice-skating on a frozen pond. At one moment, when Max is skating away from the shore at 8.2 m/s and Maya is skating towards the shore at 4.6 m/s, they collide and bounce off each other without falling.

7. When a wave crosses a surface at an angle from one medium into another, why does it change directions as it moves across the boundary into the new medium? Use 3 - 4 complete sentences in your own words to explain.