5 points
Item 11 is unpinned. Click to pin.
A 388.4 g piece of copper is heated and fas...
Chemistry, 11.05.2021 23:50 mahogany139
5 points
Item 11 is unpinned. Click to pin.
A 388.4 g piece of copper is heated and fashioned into a necklace. The amount of energy transferred by heat to the copper is 14,788. If the specific heat of copper is 0.390 J/goC, what is the change in temperature for the copper?
Answers: 2
Chemistry, 21.06.2019 18:00
Construct the hypothetical phase diagram for metals a and b between room temperature (20c) and 700c, given the following information: * the melting temperature of metal a is 480c. β’ the maximum solubility of b in a is 4 wt% b, which occurs at 420c. β’ the solubility of b in a at room temperature is 0 wt% b. β’ one eutectic occurs at 420c and 18 wt% bβ82 wt% a. β’ a second eutectic occurs at 475c and 42 wt% bβ58 wt% a. β’ the intermetallic compound ab exists at a composition of 30 wt% bβ70 wt% a, and melts congruently at 525c.β’ the melting temperature of metal b is 600c. β’ the maximum solubility of a in b is 13 wt% a, which occurs at 475c. β’ the solubility of a in b at room temperature is 3 wt% a.
Answers: 1
Chemistry, 21.06.2019 23:30
Agroup of students is studying convection currents. they fill two identical balloons with the same amount of helium. one balloon is placed in a freezer and the other in an area with warm air. after 10 minutes, the balloons are released from a height of 1 meter. which of the following do the students most likely observe? a. the balloons both rise. the cold balloon is larger than the warm balloon. b. the balloons rise at the same rate. both balloons are the same size. c. the warm balloon expands and rises. the cold balloon shrinks and sinks. d. the cold balloon expands and rises. the warm balloon shrinks and sinks.
Answers: 2
Chemistry, 22.06.2019 07:20
2pos suppose an object in free fall is dropped from a building. its starting velocity is 0 m/s. ignoring the effects of air resistance, what is the speed (in m/s) of the object after falling 3 seconds? give your answer as a positive decimal without units. answer here
Answers: 1
Chemistry, 22.06.2019 07:30
Identify two types of chemical bonding in the source of dietary potassium
Answers: 3
Mathematics, 24.07.2019 03:00
History, 24.07.2019 03:00
History, 24.07.2019 03:00
Mathematics, 24.07.2019 03:00
Mathematics, 24.07.2019 03:00
Physics, 24.07.2019 03:00
Health, 24.07.2019 03:00
Chemistry, 24.07.2019 03:00
Mathematics, 24.07.2019 03:00
Biology, 24.07.2019 03:00