Question

eleration
23. A point is on a circle of radius r. When the
completes 5 rotations then distance travelled by
(a) zero
() 5pie r
(c) 10pie r
(d) none of these
24. Displacement of a particle when it compie
5 rounds of a circle of radius r is:
(a) zero
(b) 2pie r
(c) 6 pie r
(d) 10 pie r​

Answer 1

Answer:

To reconstruct an original price from a sale price, use:

Original Price – Original Price * Mark-down-percent = Sale Price, or

Original Price * (1 - Mark-down-percent) = Sale Price

To do a double mark-down problem, we must do this twice. For the 10%:

Original Sale Price * (1 – 10%) = $207.27

Original Sale Price = $207.27/0.9 = $230.30.

For the pre-all-discount price,

Original Price * (1 – 30%) = $230.30

Original Price = $230.30/0.7 = $329.00.The classification of elements is based on the atomic number, which is a more fundamental property.

2. It explains the periodicity of the properties of the elements and relates them to their electronic configurations.

3. The reason for placing isotopes at one place is justified as the classification is on the basis of atomic number.

4. The position of the elements that were misfits on the basis of mass number (anomalous pairs like argon and potassium) could be justified on the basis of atomic number.

5. The lanthanides and actinides are placed separately at the bottom of the

periodic table.

Answer 2

Explanation:

23- c) 10 pie r

2pie r × 5 (circumference * no. of rotations)

24- a) zero, because particle's initial and final position is same.

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