What is the difference between atomic mass units (amu) and unified mass units (u or Da) ?

Melissa heated a few blue crystals in a test tube. After a few minutes, she observed that the crystals had turned white and a film of water had formed on the inside of the test tube.

Ivana walks 2km north then turns around and walks 3km south

9. A statue is to be scaled down isomorphically (It will have its size changed without changing its shape). It starts with an initial height of 6.75 [m] and ends up with a final height of 2.15 [m].

Dana is on a train traveling at a speed of 20 km/h. Dana walks from the front of the train to the back of the train at a speed of 4 km/h. What is Dana's speed relative to the ground? a.) 20 km/h b.) 12 km/h c.) 16 km/h d.) 24 km/h

A sleeping 68 kg man has a metabolic power of 79 w.

What part of the thermosphere is electrically charged? the ionosphere the hemisphere the aurora sphere the troposphere

A 24 volt doorbell carries a current of 1/2 ampere. Calculate the resistance in the bell 1. 2. 3.

Are molecular compounds and covalent molecules the same thing?

The population in the United States in 2015 was 321 million people. It is projected to increase to 438 million people by the year 2050. If projections are true, the US population will increase % from 2015 to 2050

Waves keep their what even when they bounce of something