Which example is correctly matched with its type of friction? 1 A plane flying through the air is an example of static friction.
2 Pushing a car that isn't moving is an example of sliding friction
3 A sled sliding down a grassy hill is an example of fluid friction.
4 A skateboard's wheels moving on cement is an example of rolling friction.
(i need a lil help here) (my little said she needed help, im using my account on her computer)

Carbon 14 is a naturally occurring stable

When a vertical beam of light passes through a transparent medium, the rate at which its intensity i decreases is proportional to i(t), where t represents the thickness of the medium (in feet). in clear seawater, the intensity 3 feet below the surface is 25% of the initial intensity i0 of the incident beam. what is the intensity of the beam "10" feet below the surface? (give your answer in terms of i0. round any constants or coefficients to five decimal places.)

Two point charges are separated by a certain distance. how does the strength of the electric field produced by the first charge, at the position of the second charge, change if the second charge is doubled? a. the field does not change b. the field strength decreases by half. c. the field strength doubles d. the field strength quadruples