please answer these questions guys
. Differentiate between
1. Distance time graph for uniform and non-uniform motion
2. Electric fuse and MCB
3. Virtual and Real image
4. Concave and convex mirror
5. Sludge and Scum
6.Autotrophs and Hetrotophs
7. Sundial and sand clock and water clock (important)
8. Canopy and understory level
9.shrub and herb layer
Answer please...
Answers
•The difference between uniform and non-uniform motion can be drawn clearly on the following grounds: When an object moves along a straight line with a firm speed, the motion is said to be uniform motion. ... For an object moving in uniform motion, the distance time graph shows a straight line.
•Fuse works on the principle of electrical and thermal properties of the conducting materials whereas the Circuit breaker works on the Electromagnetism and switching principle.
Fuses once used cannot be reused again, but the Circuit breaker can be reused. Hence, there is no need to change the circuit breaker after any fault takes place and the coil is tripped.
No auxiliary contact is required in case of fuse but in circuit breaker, auxiliary contact is required.
Fuse cannot be used as an ON/OFF switch whereas Circuit Breaker can be used as an ON/OFF switch.
Fuses are independent of ambient temperature, but Circuit Breaker depends on ambient temperature.
The Characteristic curve of the Fuse shifts because of the ageing effect and, as a result, it causes nuisance and tripping. The curve of the Circuit Breaker does not shift.
The Fuse provides protection against only power overloads whereas Circuit Breaker provides protection for both power overloads and short circuits.
The Fuse provides both detection and interruption process. Circuit breaker performs only interruption; a relay system is attached for detection of any fault in the circuit.
Breaking capacity of the fuse is low as compared to that of a Circuit Breaker.
Operating time of fuse is very less about 0.002 second, whereas Operating time of a Circuit Breaker is comparatively more than that of the fuse. It is about 0.02 – 0.05 second.
Mode of operation of Fuse is completely automatic, but Circuit Breakers can be operated manually as well as automatically with the help of a relay system.
The cost of the fuse is low, whereas Circuit Breakers are more costly.
•A real image is always inverted whereas a virtual image is always erect. A real image is formed when the rays of light after reflection or refraction actually meet at some point whereas a virtual image is formed when the rays of light after reflection or refraction appear to meet at a point.
•1) The reflecting surface of the concave mirror is bulged inwards. But the reflecting surface of the convex mirror is bulged outwards. (2) Concave mirror produces real and inverted images (except when the object is placed between pole and focus.
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