Alead block of mass 6.6 kg is originally at a temperature of 26°c and 1 atm. it is then heated to a temperature of 68°c without any change in pressure. the specific heat of lead is 128 j/(kg.°c), its density is 1.13 104 kg/m^3, and the coefficient of linear expansion is 29 ✕ 10^−6 /°c. (a) determine the work done by the lead block.
(b) how much heat energy is transferred during this process?
(c) what is the increase in internal energy of the system?

Identify the type of synthetic material used in each object

If gases like carbon dioxide and methane make up less than 1% of the total atmosphere, why is it important for scientists to monitor changes in percentages of these gases?

Two 1.20-m nonconducting wires meet at a right angle. one segment carries + 2.50 µc of charge distributed uniformly along its length, and the other carries - 2.50 µc distributed uniformly along it, as shown in fig. 21.50. ( a. find the magnitude and direction of the electric field these wires produce at point p, which is 60.0 cm from each wire. ( b. if an electron is released at p, what are the magnitude and direction of the net force that these wires exert on it?