Two bodies A and B are connected by a string over a pulley and a disc slides over the string (see the figure). Then (B+D) cannot be treated as a system. The reason is[ ]
a) The distance covered by B and D are equal
b) The distance covered by B and D are not equal
c) The directions of B and D are same
d) The directions of B and D are not same

Which situation will have the highest resistance? a.long wire and high temperatureb.short wire and high temperaturec.long wire and cold temperaturedshort wire and low temperature

Which of the following statements are true for an isothermal process? check all that apply. - during an isothermal process, the work done by the gas equals the heat added to the gas. - during an isothermal process, the internal energy of the system changes. - an isothermal process is carried out at constant temperature. - an isothermal process is carried out at constant pressure. - an isothermal process is carried out at constant volume.

Why do metals "give up" their valence electrons?