Solve for the voltage and the current at the resistors in th…

Solve for the voltage and the current at the resistors in the following circuits.  In both cases the cell (battery) is 25V, R1 is 6 Ohms, and R2 is 8 Ohms V=IR I=V/R R=V/I a)    b)   c). Explain how the following promote electrical safety a breaker switch a fuse  a three prong plug  

a) Why are the units that we use for measuring distances on…

a) Why are the units that we use for measuring distances on Earth not suitable for astronomical measurements?  What do we use instead?   b) Explain how a solar system can be created from the nebula left behind by an exploding star.    c) Describe two different types of telescopes that we use to look out into space.