Answer:
The answer is "2 m/s".
Explanation:
The triangle from of the right angle:
![\to (x_c-0.8)+(1.5+y_4) +\sqrt{x_c^2 + 1.5^2}= constant](https://tex.z-dn.net/?f=%5Cto%20%28x_c-0.8%29%2B%281.5%2By_4%29%20%2B%5Csqrt%7Bx_c%5E2%20%2B%201.5%5E2%7D%3D%20constant)
Differentiating the above equation:
![\to V_c +V_A+ \frac{X_cV_c}{\sqrt{x_c^2 +1}}=0\\\\\to 1-V_A+ \frac{0.8 \times 1.5}{\sqrt{ 0.8^2+1.5}}=0\\\\](https://tex.z-dn.net/?f=%5Cto%20V_c%20%2BV_A%2B%20%5Cfrac%7BX_cV_c%7D%7B%5Csqrt%7Bx_c%5E2%20%2B1%7D%7D%3D0%5C%5C%5C%5C%5Cto%201-V_A%2B%20%5Cfrac%7B0.8%20%5Ctimes%201.5%7D%7B%5Csqrt%7B%200.8%5E2%2B1.5%7D%7D%3D0%5C%5C%5C%5C)
![\to V_A= \frac{1.2}{\sqrt{ 0.64+1.5}}+1\\\\](https://tex.z-dn.net/?f=%5Cto%20V_A%3D%20%20%5Cfrac%7B1.2%7D%7B%5Csqrt%7B%200.64%2B1.5%7D%7D%2B1%5C%5C%5C%5C)
![= \frac{1.2}{ 1.46}+1\\\\= \frac{1.2+ 1.46}{ 1.46}\\\\ = \frac{2.66}{1.46}\\\\= 1.82 \ \frac{m}{s}\\\\= 2 \ \frac{m}{s}](https://tex.z-dn.net/?f=%3D%20%5Cfrac%7B1.2%7D%7B%201.46%7D%2B1%5C%5C%5C%5C%3D%20%5Cfrac%7B1.2%2B%201.46%7D%7B%201.46%7D%5C%5C%5C%5C%20%3D%20%5Cfrac%7B2.66%7D%7B1.46%7D%5C%5C%5C%5C%3D%201.82%20%5C%20%5Cfrac%7Bm%7D%7Bs%7D%5C%5C%5C%5C%3D%202%20%5C%20%5Cfrac%7Bm%7D%7Bs%7D)
Answer:
Ceramics
Explanation:
Ceramics are used to make cooktops if you look it up and according to my engineering and design class ceramics have high heat resistance and melting points, and make good electrical insulators.