A cobalt atom contains 27 protons, 32 neutrons, and 27 electrons. What is the atomic mass of cobalt?
A. 59 amu
B. 86 amu
C. 32 amu
D. 54 amu

Which statement correctly describes the current in a circuit that is made up of any two resistors connected in parallel with a battery? a. the current in the battery and in each resistor is the same b. the current the battery equals to the sum of the currents in the resistors c.the current in the battery is less than the current in either resistor d. the current in the battery equals to the product of the currents in the resistors

Selma made a diagram to compare convection and radiation. which label belongs in the area marked x? must involve temperature differences between substances or objects only occurs when molecules are in direct contact involves the movement of fluids based on density differences can occur where there is little or no matter

What is the force that opposes motion and works against the downward pull? a) friction b) gravity c) weight d) acceleration