Questions

Saw dust contains carbon which is oxidised to carbon  dioxide by concentrated nitric acid;

Let 1310 = x 

=> 3x = 10

Given that 125=3

Therefore, 52x = 10 

=> x = 10/3 = 4.

• The yellow color of urine is due to the presence of a yellow pigment, urochrome.
  
• The color of normal urine is usually light yellow to amber.

• Generally the greater the solute volume the deeper the color.

It is useful to have a property of a material that is independent of the size of the sample and can be use to compare its elastic properties with another - this is called the Modulus of Elasticity for the material.

The modulus of elasticity is defined as:

Modulus of elasticity = Stress / Strain

There are three types of moduli. They are :

(a) the Young Modulus - tensile and compression longitudinal stress

(b) the shear modulus - a shearing stress

(c) the bulk modulus - volume changes of the specimen.

Add together values in corresponding positions of the top two crosses, and put the result in the lower left cross.

Calculate the difference between values in corresponding positions of the top two crosses, and put the result in the lower right cross.

Finally add together the values in corresponding positions of the lower two crosses to give the values in the central cross