Why must the substance be stirred as it heats or cools?

What is the innermost layer of the sun's atmosphere called?

1. By what are isotopes identified? A. mass numbers B. atomic masses C. atomic mass units D. average atomic masses And 2. Uranium atoms each have 92 protons. How many protons does each U-238 atom have? A. 92 B. 146 C. 238 D. 330 And 3.

Dorit and Ronald want to try an experiment in which they drop their mother's favorite glass drinking mug out of their fourth-floor apartment window.

Waves that make up the visible part of the electromagnetic spectrum have lower energy than X-rays. lower energy than microwaves. higher energy than gamma rays. higher energy than ultraviolet light.

How much tension is in a rope if it pulls a 5-kg bucket filled with water with an upward acceleration of 1m/s^2

Which of these substances has the highest pOH? 0.10 M HCl, pH = 1 0.001 M HNO3, pH = 3 0.01 M NaOH, pH = 12

A climber pulls herself 8 meters upwards with a force of 150 Newtons. If it takes her 16 seconds to cover the 8 meters, how much power is she using? A. 40 W B. 55 W C. 70 W D. 75 W

How is volume calculated directly and indirectly

Which state of matter has the greatest amount of particle movement?

An engineer wishes to design a hydraulic system that will transmit pressure of 10,000 pascals using a force of 15 newton's how are large an area should the input piston have