Three people bought copper items, and they each relied on different properties of copper. bernie bought a set of dishes that included a copper salad bowl. nicholas went to the hardware store and bought 12-gauge wire. matt bought his mother a copper bracelet. which property most likely attracted each buyer to his item?
a. bernie relied on conductivity, nicholas relied on ductility, and matt relied on malleability.
b. bernie relied on ductility, nicholas relied on malleability, and matt relied on appearance.
c. bernie relied on malleability, nicholas relied on ductility, and matt relied on appearance.
d. bernie relied on malleability, nicholas relied on appearance, and matt relied on conductivity.

What happens to light waves from a star as the star moves away from earth?

An artificial satellite circles the earth in a circular orbit at a location where the acceleration due to gravity is 6.03 m/s^2. determine the orbital period of the satellite.

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.