Question

Good morning everyone happy navratri too all of you please help me with the questions ​

Answer 1

Answer:

A. One joule of work is done on an object when a force of one newton is applied over a distance of one meter. The joule is named after James Prescott Joule who lived from 1818 until 1889.

B. the angle of incidence is always equal to the angle of reflection. Therefore, the angle of reflection is same as the angle of incidence, that is, 00. So, the reflected ray will retrace the path of the incident ray.

C. C=

C= 9

C= 95

C= 95

C= 95 ×(F−32)

C= 95 ×(F−32)Putting F=5, we get C=−15

C= 95 ×(F−32)Putting F=5, we get C=−15 0

C= 95 ×(F−32)Putting F=5, we get C=−15 0 C

C= 95 ×(F−32)Putting F=5, we get C=−15 0 C2. K=

C= 95 ×(F−32)Putting F=5, we get C=−15 0 C2. K= 9

C= 95 ×(F−32)Putting F=5, we get C=−15 0 C2. K= 95

C= 95 ×(F−32)Putting F=5, we get C=−15 0 C2. K= 95

C= 95 ×(F−32)Putting F=5, we get C=−15 0 C2. K= 95 ×(F−32)+273

C= 95 ×(F−32)Putting F=5, we get C=−15 0 C2. K= 95 ×(F−32)+273 Putting F=5, we get K=258 K

D. Uses of plane mirrors

Uses of plane mirrorsThey are used in periscopes, for signalling, in kaleidoscopes, to see round dangerous bends, in meters, as mirror tiles, in a sextant, in an overhead projector, an SLR camera, car wing mirrors, in microscopes and as reflecting number plates to mention only some!

E. The freezing chest of a refrigerator is always fitted near the top in a refrigerator because it cools the remaining space of the refrigerator by convection currents. The air near the freezing chest cools and descends while the warmer air at the bottom rises up.