Which of the following statements about matter and energy transfer is TRUE? A. Energy can be transferred into an ecosystem, but only matter can be transferred out.
B. Matter can be transferred into and out of an ecosystem, but energy cannot.
C. Both matter and energy can be transferred into and out of ecosystems.
D. Neither matter nor energy can be transferred into or out of ecosystems.

(help) science

Red light strikes a metal surface and electrons are ejected. if violet light is now used with a 10% greater intensity, what will happen to the ejection rate (number of ejected electrons per second) and the maximum energy of the electrons? a) greater ejection rate; same maximum energyb) same ejection rate; greater maximum energyc) greater ejection rate; greater maximum energyd) same ejection rate; same maximum energye) none of the above answers are correct

Three charge are arranged as shown in the diagram. the magnitude of the net electrical force acting on the +6 uc charge, rounded to the tenths place, is .

What pressure difference is required between the ends of a 2.0-m-long, 1.0-mm-diameter horizontal tube for 40 c water to flow through it at an average speed of 4.0 m/s?