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2. On Sunday 845 people went to the Zoo. On Monday only 169 people went. What is the percent decrease in the people visiting the Zoo on Monday? 2. On Sunday 845 people went to the Zoo. On Monday only 169 people went. What is the percent decrease in the people visiting the Zoo on [...]

If one of the slits of a standard Young’s double-slit experiment is covered by a thin parallel sided glass slab so that it transmits only one-half the light intensity of the other, then If one of the slits of a standard Young's double-slit experiment is covered by a thin parallel sided glass slab so that [...]

1. A man got 10% increase in his salary. If his new salary is Rs.1,54,000, find his original salary. 000. 1. A man got 10% increase in his salary. If his new salary is Rs.1 54 find his original salary. October 11, 2020 Category: Chapter 7 - Cubes and Cube Roots , Maths , NCERT [...]

6. If 60% people in a city like cricket, 30% like football and the remaining like other games, then what percent of the people like other games? If the total number of people are 50 lakh, find the exact number who like each type of game. 30% like football and the remaining like other games [...]

If the first minima in Young’s double-slit experiment occurs directly in front of one of the slits (distance between slit and screen D = 12 cm and distance between slits d = 5 cm), then the wavelength If the first minima in Young's double-slit experiment occurs directly in front of one of the slits (distance [...]

5. If Chameli had Rs. 600 left after spending 75% of her money, how much did she have in the beginning? 5. If Chameli had Rs. 600 left after spending 75% of her money how much did she have in the beginning? October 11, 2020 Category: Chapter 7 - Cubes and Cube Roots , Maths [...]

In Young’s double-slit experiment, let A and B be the two slits. A thin film of thickness t and refractive index mu is placed in front of A. Let beta = fringe width. Then the central maxima In Young's double slit experiment let A and B be the two slits. A thin film of thickness [...]

4. A football team won 10 matches out of the total number of matches they played. If their win percentage was 40, then how many matches did they play in all? 4. A football team won 10 matches out of the total number of matches they played. If their win percentage was 40 then how [...]

3. 72% of 25 students are good in mathematics. How many are not good in mathematics? 3. 72% of 25 students are good in mathematics. How many are not good in mathematics? October 11, 2020 Category: Chapter 7 - Cubes and Cube Roots , Maths , NCERT Class 8 ,

Two monochromatic coherent point sources S1 and S2 are separated by a distance L. Each source emits light of wavelength lemda; where L >> lemda. The line S1S2 when extended meets a Two monochromatic coherent point sources S1 and S2 are separated by a distance L. Each source emits light of wavelength lemda; where L [...]