Tanks of compressed gas must be kept away from heat sources. if a compressed–gas tank is heated too much, it may explode and cause a great deal of damage. which of the following best explains why a compressed–gas tank can explode if it is heated? a. as the gas gets hotter, the molecules gain energy and move farther apart, causing the gas to expand. b. as the gas gets hotter, the molecules expand, causing the gas to exert more pressure. c. as the gas absorbs heat, the molecules break apart, increasing the volume of the gas. d. as the gas absorbs heat, the molecules move more quickly, making the gas more corrosive.

We want to calculate the total metabolic heat generated by a singing canary taking into account heat transfer by radiation, convection and exhaling air. the air temperature is 20 oc, canary’s body internal and surface temperature is 33oc, external body surface convective heat transfer coefficient is 25.2 w/m2 .k, temperature difference between the inhaled and exhaled air is 4.3 oc, the ventilation rate is 0.74 cc of air per second, specific heat of air is 1.0066 kj/kg.k and density of air is 1.16 kg/m3 . assume the canary’s body to be a cylinder with 7 cm diameter and 9 cm length, and heat exchange is from the side as well as the top and bottom of cylinder. calculate 1) the net rate of heat lost by radiation, assuming heat gained by the bird through radiation from the surroundings is 11.5 w; 2) rate of heat transferred by convection to the surrounding air; 3) rate of heat transferred in the exhaling air without considering any internal evaporation; 4) total metabolic power.

Use the right-hand rule for magnetic force to determine the charge on the moving particle. this is a charge.

12. a body is a particular amount of matter. it can be a solid, liquid or gas. it can be described as existing in a. size and shape. b. motion and force c. time and space. d. location and movement.