O núcleo de um átomo possui 5 prótons e 6 nêutrons. Determine o número atômico (Z) r o. número de massa (A)

A student, standing on a scale in an elevator at rest, sees that his weight is 997 N. As the elevator rises, the scale reads 1226 N and then returns to normal.

Lauren's friend asked her to come hang out this weekend with some people from the school tennis team. what question should lauren ask to protect her heath and safety? a) what will we be doing? b) what will you be wearing?

Two balls are placed near one another and hang down, as shown below. Which conclusion is supported by this evidence? Neither ball has a charge. The balls are both positively charged.

What is inertia? Define this term in your own words and provide an example that demonstrates this concept.

Lightning strikes in the distance and six seconds later Thunder is heard how far away was the lightning strike

As one goes from left to right in a period, which of the following is true? A. The number of protons decreases. B. The number of valence electrons increases. C. both A and B D. none of the above

Which phrases describe organisms that formed index fossils

What will happen to plant height if the amount of available light is reduced due to global dimming? Which type of investigation would most likely be conducted to answer the following question?

A machine has an efficiency of 80%. How much work must be done on the machine so to make it do 50,000 J of output work?

What is the name of the area surrounding earth that is influenced by earth's magnetic field?