Suppose your normal body temperaturfe were lower then what it is. How would the sensation of hot and cold change?

Which of the following statements is/are correct about heat? 1. It causes the sensation of hotness and cold ness. 2. When a body is heated, its energy decreases. 3. S.I. unit is Joule. Choose the correct option from the codes given below :

Read the following paragraph carefully and answer the following question . If the heat is exchanged between a hot and cold object, the temperature of the cold object goes on increasing due to gain of energy and the temperature of the hot object goes on decreasing due to loss of energy . The change in temperature continues till the temperatures of both the the object attain the same value . In the process, the cold object gains heat energy and the hot object lose heat energy . If the system of both the object is isolated from the environment by keeping it inside a heat resistance box ( meaning that the energy exchange takes place between the two object only), then no energy can flow from inside the box or come into the box. How will you state the principle briefly ?

A doctor detected a tumour in the body of a person. The patient feels that he would die soon due to tumour. How can you help him to overcome his fear?. Write your response.

Your friend is returning home after his visit to USA. All at home are waiting for his arrival. How would you feel? State the division of ANS that predominates and mention few changes that take place in your body.

How many eggs are released by a human ovary in a month? How many eggs do you think would have been released if the mother gave birth to identical twins? Would your answer change if the twins born were fraternal?

If the radius of the Earth were increased by a factor 5, by what factor would its density have to be changed to keep the value of acceleration due to gravity the same?

6.A straight wire carrying a current of 12 A is bent into a semi-circular arc of radius 2.0 cm as shown in Fig. (a). Consider the magnetic field B at the centre of the arc. a . What is the magnetic field due to the straight segments? b. In what way the contribution to B from the semicircle differs from that of a circular loop and in what way does it resemble? c. Would your answer be different if the wire were bent into a semi-circular arc of the same radius but in the opposite way as shown in Fig. (b)?

A point charge causes an electric flux of -1.0 xx 10^(3) Nm^(2)//C to pass through a spherical Gaussian surface of 10.0 cm radius centred on the charge. a. If the radius of the Gaussion surface were doubled, how much flux would passes through the surface? b. What is the value of the point charge?