Which actions are evidence that a chemical reaction has occurred? Check all that apply. a change in color the formation of a precipitate a clear liquid becoming cloudy a change in shape the formation of bubbles the formation of smoke

An imaginary lines which cuts earth half horizontally

Example of conversion of electricity to other energy resources

Which of the following is NOT a stage of cellular respiration? a. fermentation b. electron transport c. glycolysis d. Krebs cycle

The formulas N2 and H2O and CO2 all represent molecules which are defined as

A 1kg dart moving horizontally makes an impact with and sticks to a block of wood that is 11kg the two objects then slide on a frictionless surface with a speed of. 8 meters per second what is the velocity of the dart before it hits the wood?

How are magnetic poles and electrical charges similar? A. Their same forces repel each other, and their opposite forces attract each other. B. Their same forces attract each other, and their opposite forces repel each other. C.

As part of his meal, a workman has a cup containing a hot drink. In order to keep the drink hot whilst he eats the rest of his meal, he covers the cup, as shown in the figure. Which sources of energy loss does this action reduce? Tick two boxes.

When energy is transformed, the amount of usable energy?

If an object weighs 39.2 n on earth, what is its mass

What happens when pressure is applied to a solid.