Assume the horse’s hooves do not slip on the rocky ground and that air resistance is negligible. When the horse started running, its temperature rose quickly to a point at which from then on, heat transferred from the horse to the air keeps the horse’s temperature constant. Once the temperature of the horse is constant, which equation is the correct statement of the energy principle, ∆Esys = W +Q, taking the horse as the system?
1.∆Erest+∆K+∆Echemical+∆Ethermal+∆U grav=−Mgh−|Q|
2.∆Echemical+∆Ethermal= 0

True or false: the cycle of seasons on the earth is caused by the tilt of the earth on its axis toward and away from the sun.

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?

Which changes would result in a decrease in the gravitational force btween two objects? check all that apply