Answer:
![Q_{metal} = -6799\,J](https://tex.z-dn.net/?f=Q_%7Bmetal%7D%20%3D%20-6799%5C%2CJ)
Explanation:
By the First Law of Thermodynamics, the piece of metal and water reaches thermal equilibrium when water receives heat from the piece of metal. Then:
![Q_{metal} = - Q_{w}](https://tex.z-dn.net/?f=Q_%7Bmetal%7D%20%3D%20-%20Q_%7Bw%7D)
![Q_{metal} = m_{w} \cdot c_{p,w}\cdot (T_{1}-T_{2})](https://tex.z-dn.net/?f=Q_%7Bmetal%7D%20%3D%20m_%7Bw%7D%20%5Ccdot%20c_%7Bp%2Cw%7D%5Ccdot%20%28T_%7B1%7D-T_%7B2%7D%29)
![Q_{metal} = (250\,g)\cdot \left(4.184\,\frac{J}{g\cdot ^{\textdegree}C} \right)\cdot (25\,^{\textdegree}C - 31.5\,^{\textdegree}C)](https://tex.z-dn.net/?f=Q_%7Bmetal%7D%20%3D%20%28250%5C%2Cg%29%5Ccdot%20%5Cleft%284.184%5C%2C%5Cfrac%7BJ%7D%7Bg%5Ccdot%20%5E%7B%5Ctextdegree%7DC%7D%20%5Cright%29%5Ccdot%20%2825%5C%2C%5E%7B%5Ctextdegree%7DC%20-%2031.5%5C%2C%5E%7B%5Ctextdegree%7DC%29)
![Q_{metal} = -6799\,J](https://tex.z-dn.net/?f=Q_%7Bmetal%7D%20%3D%20-6799%5C%2CJ)
heres your answer mate...
B. released, forming bonds usually releases energy.
Answer:
Living organisms present in soil include archaea, bacteria, actinomycetes, fungi, algae, protozoa, and a wide variety of larger soil fauna, including springtails, mites, nematodes, earthworms, ants, insects that spend all or part of their life underground, and larger organisms such as burrowing rodents.
Explanation:
Answer:
Labor unions were created in order to help the workers with work-related difficulties such as low pay, unsafe or unsanitary working conditions, long hours, and other situations. ... Sometimes the unions organized strikes in order to try to change the conditions of the workers.
Explanation: