Mercury is a very small planet, with a surface that is exposed directly to space. This is because the planet has practically no atmosphere. Normally, no atmosphere would mean very cold, but it is very hot on Mercury. Why?
A)
Since it is so small, it generates its own heat.
B)
Because Mercury is the closest planet to the sun.
C)
Because of the Mercurial volcanoes on the planets surface.
D)
Their are hot springs on the surface that constantly boil.

The enthalpy of formation of water is -285.8 kj/mol. what can be inferred from this statement?

What semimetal can form four single covalent bonds.

Electromagnets coils of wire paper clips picked up 10 3 15 6 20 9 25 12 ms. owens' class was studying magnets. ms. owens showed her students how to make an electromagnet using a nail, a d-cell battery, and plastic coated wire. the students wrapped the wire around the nail and then attached the ends to the battery. when they were finished, they tested their magnets by investigating how many paperclips their magnets could pick up. they also tested whether they could increase the strength of their electromagnets by using more coils of wire. they recorded the class average of their results in the data table seen here. ms. owens asked her students to graph their data in a line graph. how should the students label the x-axis on their line graph? a) size of battery b) number of paper clips c) number of coils of wire d) strength of electromagnet