Imagine that frames r us, inc., is constructing an economy reference frame whose price will be below every water g with ers on ection other frame on the market. placing a clock at every point in the frame lattice is too expensive, so the company decides to place one clock at the origin. at all other positions, the company simply places a flag that springs up when an object goes by. the flag has the lattice location printed or it, so an observer sitting at the origin can assign spacetime coordinates to every event by noting when he or she sees o the the flag spring up (according to the clock at the origin) and in a noting the spatial coordinates indicated by the flag. why mov- doesn't this method yield the same spacetime coordinates sthe as having a clock at every location would? pinpoint the gali- assumption that the engineers at frames r us are making pic- that is incorrect. (see problem r1r.2 for a further explora- nsfor- lative hich hich tion of the problems with this reference frame.) r1m.

I'm kinda lost ! 1. when marilyn takes her pet dog for a walk, the dog walks at a veryconsistent pace of 0.55 m/s. draw a position-time graph to representmarilyn's dog walking the 19.8 m distance from the front of her house tothe nearest fire hydrant.2. both car a and car bleave school when a stopwatch reads zero. car atravels at a constant 75 km/h, and car b travels at a constant 85 km/h. a) draw a position-time graph showing the motion of both cars. howfar are the two cars from school when the stopwatch reads 2 hrs? calculate the distances and show them on your graph. b) both cars passed a gas station 120 km from the school. when dideach car pass the gas station? calculate the times and show themon your graph.3. the figure below shows the position-time graph showing a shopper'smovement up and down the aisle at a store. a) write a story describing the shopper's movements at the store. b) when does the shopper have a position of 6 m? c) how much time passes between when the shopper enters the aisleand when he gets to a position of 12 m? what is the shopper's averagevelocity between 37 s and 46 s?

What is required for an electric charge to flow through a wire? zero resistance in the wire a balance of electric potential high resistance in the wire a difference in electric potential

Unpolarized light falls on two polarizer sheets whose transmission axes are at right angles. a third polarizer is placed between the first two so that its axis makes a 52-degree angle with the axis of the first polarizer. a) what fraction of the incident light intensity is transmitted through the first polaroid? b) what fraction of the incident light intensity is transmitted through the second polaroid? c) what is the angle of polarization of the light that enters the third polaroid? d) what fraction of the incident light intensity is transmitted through the third polaroid. e) what happens if the middle polaroid is removed?