Use the inverse square law for light to answer each of the following questions. Part A Suppose a star has the same luminosity as our Sun (3.8×1026watts) but is located at a distance of 10 light−years . What is its apparent brightness?

The metal wire in an incandescent lightbulb glows when the light is switched on and stops glowing when it is switched off. this simple process iswhich kind of a change? a. a physical changeb. a chemical changec. a nuclear changed. an ionic change

**urgent** roberto plans to use two transformers to reduce a voltage of 120 v to 4 v. he uses a transformer that has 300 coils in the primary winding and 50 coils in the secondary winding. he has four other transformers, as listed in the table. which transformer should roberto use to have an ending voltage of 4 v? a- w b-xc- yd- z

Which pair of quantities includes one quantity that increases as the other decreases during simple harmonic motion?