Question 1 :
Find three machines that can be replaced with hook-ups of (× 5)
machines.
Question 4 :
Express the result in power notation with positive exponent. $2^{– 3} × (–7)^{– 3}$
Question 7 :
<img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1cccef59b460d7261edee.PNG' />
Refer to the above image. Determine whether there is a single repeater machine that will do the same work. If so, describe it.
Question 9 :
Find the value of $(3^{– 1} + 4^{– 1} + 5^{– 1})^0$
Question 11 :
If a = – 1, b = 2, then find the value of $a^b-b^{a}$
Question 24 :
Express in standard form: 1 micron is equal to $\frac{1}{1000000} m$
Question 28 :
<img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1cccff59b460d7261edef.PNG' />
Refer to the above image. Determine whether there is a single repeater machine that will do the same work. If so, describe it.
Question 31 :
State true or false: Very large and very small numbers can be expressed in standard form.
Question 33 :
<img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1cccef59b460d7261eded.PNG' />
Refer to the above image. Determine whether there is a single repeater machine that will do the same work. If so, describe it.
Question 35 :
In a stack there are 5 books each of thickness 20 mm and 5 paper sheets each of thickness 0.016 mm. What is the total thickness of the stack.
Question 37 :
Find a repeater machine that will do the same work as a $(× \frac{1}{8})$ machine.
Question 38 :
State true or false: For any non-zero integer a, $a^{(-m)} = 1/a^m$
Question 39 :
Express in standard form: Size of a plant cell is 0.00001275 m
Question 48 :
Mass of Mars is $6.42 × 10^{29}$ kg and mass of the Sun is $1.99 × 10^{30}$ kg. What is the total mass?