Engineers use their understanding of Newton's law to design effective roller coasters safety harnesses the diagram shows a passenger at the end of the roller coaster ride with a device on the tracks goes down the roller coaster train select the correct responses to complete the statement below if a roller coaster train traveling at 50 km collides with the topping device with a force of 55 n, the device will exert 55 + 105 + or 110 n of force on the roller coaster train as the roller coaster so sad the passenger's body will push towards on the safety harnesses safety harnesses will apply and equal or unequal force in the same or opposite direction keeping the passenger in his or her seat​

answer: c. the experiment shows that the red substance experienced a chemical change.

explanation: chemical change is the change in which chemical composition of the substance changes. physical change is the change in which there is no change in chemical composition.

chemical changes are accompanied by following changes:

a) precipitate formation

b) energy is released or absorbed

c) formation of bubbles

d) change in color

as it is given that the red color has disappeared and there is production of gas, it means the red substance has undergone a chemical change.

e

he uptake of drugs from the intestine is often strongly influenced by diffusion. for example, consider a water-insoluble steroid for treating inflammation that is solubilized in aggregates of detergent molecules, called micelles. these micelles, aggregates of 80 soap molecules, have a molecular weight of 24,000, a diameter of 2.6 nm, and a charge of -27. the positively charge ions (counterions) in this system are na".