a union b union c

If two sets are given, a set can be formed by using all the elements of the two sets. Such a collection is called the union of the given set..

Scent: Many of the flowers emit sweet smell to attract insects. It is an excellent adaptation especially in nocturnal flowers. Because of scent even in the absence of light, insects can reach the flowers. e.g., Cestrum (night queen). Bees and butterflies are attracted by sweet smell. But the inf..

- observe the angles ABP and ABQ Now, in D le PAB, we know that values of and AB. \ AP can be determined. In D le QAB, we know the values of and AB. \ AQ can be determined. In D le PAQ, we know the values of AP, AQ and \ PQ can be determine..

From this experiment, we can conclude that when the center of gravity is nearer the base of support as in figure (b) above, the body is in the stable equilibrium. In figure (a) in previous experiment and figure (a) above, the body is said to be in unstable equilibrium. The body is said t..

The data shown are the grades received by twelve students. B, B, B, A, B, A, B, B, A, C, C, B Which measure of central tendency is the best for the given situation? => Mode or Range or Median or Mean..

Figures (a) and (b) show its two triangles. Figure (c) shows two triangles superimposed and suggests a geometric method of drawing the two triangles. From figure (c), it is evident that if b < c sinB, there is no triangle. The followin..

p /C v The ratio of molar heat capacities at constant pressure to that at constant volume is represented by g . The value of g gives information about the atomicity of gases..

Take some sulphur in a deflagrating spoon and heat it till it catches fire. Then introduce into a jar of oxygen. The sulphur will burn much more vigorously with a bluish flame, forming sulphur dioxide. Add some water into the jar and shake well. A test of this solution with blue litmus paper will ..

p and C v When the temperature of 1 mol of ideal gas is to be raised through one degree (1 K) the gas is heated at constant volume. The gas under this condition does no external work and the heat supplied increases the internal energy of the gas. When the gas is heated at constant pr..

When the body is at position C, its height above the ground may be regarded as zero. Therefore, potential energy of the body = 0. If v c is the velocity with which the body touches the ground, then v c 2 - 0 = 2gh v c 2 = 2gh Total energy of the bo..