![Two plane mirror M(1) and M(2) are placed parallel to each other 20 cm apart. A luminous point object 'O' is placed between them at 5 cm from M(1) as shown in Two plane mirror M(1) and M(2) are placed parallel to each other 20 cm apart. A luminous point object 'O' is placed between them at 5 cm from M(1) as shown in](https://d10lpgp6xz60nq.cloudfront.net/physics_images/CP_JM_PHY_PT_UT_09_E01_004_Q01.png)
Two plane mirror M(1) and M(2) are placed parallel to each other 20 cm apart. A luminous point object 'O' is placed between them at 5 cm from M(1) as shown in
![Find the power of a convex lens which forms a real, and inverted image of magnification –1 of an object placed at a distance of 20 cm from its optical centre. Find the power of a convex lens which forms a real, and inverted image of magnification –1 of an object placed at a distance of 20 cm from its optical centre.](https://api.flasheducation.co.in/media/images/2020/09/10/image_EU3ZFXp.png)
Find the power of a convex lens which forms a real, and inverted image of magnification –1 of an object placed at a distance of 20 cm from its optical centre.
![An iron beam is 9 m long, 40 cm wide and 20 cm high. If 1 cubic metre of iron weight 50 kg, what is the weight of the beam.? | EduRev Class 8 Question An iron beam is 9 m long, 40 cm wide and 20 cm high. If 1 cubic metre of iron weight 50 kg, what is the weight of the beam.? | EduRev Class 8 Question](https://edurev.gumlet.io/ApplicationImages/Temp/7174155_8d269f42-5c4d-47e1-816b-26ef92149aa0_lg.png)
An iron beam is 9 m long, 40 cm wide and 20 cm high. If 1 cubic metre of iron weight 50 kg, what is the weight of the beam.? | EduRev Class 8 Question
![Figure 10 - 46 shows particles 1 and 2, each of mass m, fixed to the ends of a rigid massless rod of length L1 + L2 , with L1 = 20 Figure 10 - 46 shows particles 1 and 2, each of mass m, fixed to the ends of a rigid massless rod of length L1 + L2 , with L1 = 20](https://haygot.s3.amazonaws.com/questions/1750847_1766298_ans_8392f76f4eaf45a785c582ea49d2140a.jpg)