One problem with weight training as a way to improve overall health is that the results of a weight-training program are not measurable.
B.False
Neither energy nor matter can enter and exit an isolated system.
Explanation:
There are three types of systems which refers to universe. They are
1. Open System : In an open system, both energy and matter have external interactions. Example:- boiling water in an open pan.
2. Closed system : In a closed system, only energy has interaction with surroundings. Example:- boiling water with a lid on the pan.
3. Isolated system : In an isolated system, neither energy-nor matter has external interactions with surroundings. Example : a thermos flask does not exchange energy and matter.
Hence, the correct option is (a) " neither energy nor matter ".
I believe the correct answer from the choices listed above is option 3. The work done by the student to the book would be 50 J. T<span>he </span>work done<span> by gravity is simply the force of gravity times the displacement. That is 25N x 2 m and is equal to 50 J. Hope this answers the question.</span>
Forgot answer choices but it would be LONGITUDINAL WAVES<span />
