recycling and using alternative power
Answer: Option B
Explanation:
Myofibrils are very fine contractile fibers which extends in parallel to the columns along the length of the striated muscles fibres.
They are made of thick and thin myofilaments because of which the muscles appear striped.
The thick filaments in the muscles are composed of actin along with two other muscle protein known as tropomyosin and troponin. They help in contraction of muscles.
Answer:
B. Voltage is when current flows from higher to lower potential energy.
Explanation:
Voltage refers to the difference in electric potential between two points. Current in the wire always flow from higher potential to lower potential due to voltage. At the electric source, voltage of current is high but when it moves through wire, the amount of current decreases when it reaches to the other end of the circuit. This is because of the resistance present inside the wire which causes heat energy and some of the current is lost.
<span>Your basic lens is the pinhole camera. You can illustrate
a picture to exemplify how the light rays bypass through the hole to outline a picture
on the screen. A lens is a development on the pinhole, but the pinhole result
is still there, defined by the width of the lens. In a camera, the width is
adjustable and that is what the f-stop embodies. A small f-stop means a small
hole and the pinhole effect permits focus in a large range. A large f-stop
means the focus has to be more accurate, and things in front or behind the
focus point are blurred. In a microscope you have no such adjustment, so depth
of focus is always the same meaning that some objects in front of and behind
the object being viewed will also come into view in focus.</span>
