Answer:
i think answer is c
Explanation:
as formation water from steam condensed release heat
else all need heat
Answer:
275 kJ
Explanation:
KE = ½mv² = ½(1200)(25²) = 375,000
Answer:
1421 seconds or 23.67 minutes
Explanation:
Q = Heat = 1200 W
c = Specific heat of human body = 3480 J/kgK
= Change in temperature = (44-37)°C
t = Time taken
![Q=\dfrac{mc\Delta T}{t}\\\Rightarrow t=\dfrac{mc\Delta T}{Q}\\\Rightarrow t=\dfrac{70\times 3480\times (44-37)}{1200}\\\Rightarrow t=1421\ s](https://tex.z-dn.net/?f=Q%3D%5Cdfrac%7Bmc%5CDelta%20T%7D%7Bt%7D%5C%5C%5CRightarrow%20t%3D%5Cdfrac%7Bmc%5CDelta%20T%7D%7BQ%7D%5C%5C%5CRightarrow%20t%3D%5Cdfrac%7B70%5Ctimes%203480%5Ctimes%20%2844-37%29%7D%7B1200%7D%5C%5C%5CRightarrow%20t%3D1421%5C%20s)
The time student jogs before irreversible body damage occurs is 1421 seconds or 23.67 minutes
Answer:
the possible frequencies for the A string of the other violinist is 419 Hz
Explanation:
given information:
= 3 Hz
the frequency of the first violinist
= 422 Hz
to find the possible frequency of the other violinist, we use the following equation':
= l
-
l
3 = l 422 -
l
= 422 - 3
= 419 HZ
Answer:
![8.36541\times 10^{56}](https://tex.z-dn.net/?f=8.36541%5Ctimes%2010%5E%7B56%7D)
Explanation:
Mass of the sum = ![2\times 10^{30}\ kg](https://tex.z-dn.net/?f=2%5Ctimes%2010%5E%7B30%7D%5C%20kg)
70% of this mass is
![0.7\times 2\times 10^{30}=1.4\times 10^{30}\ kg](https://tex.z-dn.net/?f=0.7%5Ctimes%202%5Ctimes%2010%5E%7B30%7D%3D1.4%5Ctimes%2010%5E%7B30%7D%5C%20kg)
Mass of hydrogen in the sun is ![1.4\times 10^{30}\ kg](https://tex.z-dn.net/?f=1.4%5Ctimes%2010%5E%7B30%7D%5C%20kg)
Mass of a hydrogen atom = ![1.6735575\times 10^{-27}\ kg](https://tex.z-dn.net/?f=1.6735575%5Ctimes%2010%5E%7B-27%7D%5C%20kg)
Dividing the mass hydrogen in the sun by the mass of one hydrogen atom will give us the number of hydrogen atoms
![\frac{1.4\times 10^{30}}{1.6735575\times 10^{-27}}=8.36541\times 10^{56}](https://tex.z-dn.net/?f=%5Cfrac%7B1.4%5Ctimes%2010%5E%7B30%7D%7D%7B1.6735575%5Ctimes%2010%5E%7B-27%7D%7D%3D8.36541%5Ctimes%2010%5E%7B56%7D)
The number hydrogen atoms in the Sun is ![8.36541\times 10^{56}](https://tex.z-dn.net/?f=8.36541%5Ctimes%2010%5E%7B56%7D)