Huifen weighs herself on her bathroom scales. She says "My weight is 54 kg!"In Science, what Huifen said would be considered wrong. Explain why.

How many molecules are present in 3 mols of silicon dioxide (sio2)?

The long handle on a rake is a(n) a. lever b. screw c. wedge d. inclined plane

(2) (a) you have a simple circuit that consists of only a battery (δvbat=1.5v) and two resistors with resistance r1=10ω and r2=5ω, connected in series with each other. what is the current running through the battery? (b) you re-arrange your circuit so now r2 is attached in parallel to r1 rather than in series. what is the current running through the battery? (c) you add an additional resistor r3=7ω on the same branch as r2. what is the current running through the battery? (d) what is the power dissipated in r3?