Who was the first female astronomer?
Archimedes
Plato
En Hechi'Anna
Aristotle

When applying kirchhoff's rules, one of the essential steps is to mark each resistor with plus and minus signs to label how the electric potential changes from one end of the resistor to the other. the circuit in the drawing contains four resistors, each marked with the associated plus and minus signs. however, one resistor is marked incorrectly. which one is it?

What is the earliest point in the universe that we can observe? why can’t we see back further than this?

Name three different units of energy used to measure heat and describe what type of situations each is usually used.