Question 13 (2 points) 3
Which statement best describes energy in an open system?
6
Energy and matter flow into and out of the system.
All energy and matter are contained within the system.
There is no energy in an open system; there is matter.
Matter flows into and out of the system; energy does not.

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.)

Urgent i will give brainliest farmer dantzler brings her prize pig, penny, to the annual country fair. if the mass of the pig is 140 kg, what is the weight? (what are you solving for? what is your formula? what unit do you use to represent weight? you can do it! ) your a.14 g b.140 n c. 1400 kg d. 1372 n show me how to work it too

If a rock is thrown upward on the planet mars with a velocity of 10 mys, its height in meters t seconds later is given by y − 10t 2 1.86t 2 . (a) find the average velocity over the given time intervals: (i) [1, 2] (ii) [1, 1.5] (iii) [1, 1.1] (iv) [1, 1.01] (v) [1, 1.001] (b) estimate the instantaneous velocity when t − 1.