When henrietta leavitt discovered the period-luminosity relationship, she used cepheid stars that were all located in the small magellanic cloud. why did she need to use stars in another galaxy and not cepheids located in the milky way?

Current enters a circuit at a: 1.positive terminal 2.negative terminal 3.low potential side 4.resistor

To run the physics cart, the fan speed of the cart is manipulated. this is the (blank) variable. the cart accelerates due to the speed of the fan. acceleration is therefore the (blank) variable. a “constant” is a parameter that stays the same regardless of the variables. one parameter of the cart that is held constant is the (blank) .

Write the correct abbreviation for each metric unit