The number `4, 70 , 394` is standard from is written as (a)4.70394`xx10^5` (b) 4.70394`xx10^4` (c)47.0394`xx10^4` (d) 4703.94`xx10^2`

The number 2.35 xx10^4 in the usual from is written as (a) 2. 35xx10^3 (b) 23500 (c)2350000 (d) 235xx10^4

0.5xx10^(-4)xx0.3xx10^(-3)xx10

Radium has atomic weight 226 and half life of 1600 years. The number of disintegrationsd produced per second from one gram is a. 4.8 xx 10^(10) b. 3.7 xx 10^(20) c. 9.2 xx 10^(6) d. 3.7 xx 10^(8)

3xx10^(5) + 4xx10^(3) + 7xx10^(2) + 5 is equal to

The potential difference applied to an X-ray tube is 5k V and the current through it is 3.2 mA. Then, the number of electrons striking the target per second is. (a) 2xx10^16 (b) 5xx10^6 (c ) 1xx10^17 (d) 4xx10^15 .

Find the number from each of the following expanded forms :(a) 8xx10^(4)+6xx10^(3)+0xx10^(2)+4xx10^(1)+5xx10^(0) (b) 4xx10^(5)+5xx10^(3)+3xx10^(2)+2xx10^(0)(c)3xx10^(4)+7xx10^(2)+5xx10^(0)

State True or False : 876543=8xx10^(5)+7xx10^(4)+6xx10^(3)+5xx10^(2)+4xx10^(1)+3xx10^(@)

Write the numeral whose expanded form is given below: ( i ) 6 xx 10^(4)+3 xx 10^(3)+0 xx 10^(2)+7 xx 10^(1)+8 xx 10^(0) ( ii ) 9 xx 10^(6)+7 xx 10^(5)+0 xx 10^(4)+3 xx 10^(3)+2 xx 10^(2)+9 xx 10^(1)+6 xx 10^(0) ( iii ) 8 xx 10^(5)+6 xx 10^(4)+4 xx 10^(3)+2 xx 10^(2)+9 xx 10^(1)+6 xx 10^(0)