Explanation:
radio waves, which include visible light waves.
Between noon and 2 pm, the amount of water in the rain gauge decreased.
This can be caused by evaporation, which turns water into water vapor.
Precipitation would increase the amount of rain water in the gauges, not decrease it.
Condensation occurs after evaporation but wouldn't decrease the water in the gauges by itself.
Runoff is when water on land drains into water sources such as lakes, rivers, oceans, etc.
So the answer is A. evaporation.
Answer:
4 m/s
Explanation:
T = Tension
m = Mass of string
Velocity of wave in string is given by
For first cable
![v_1=\sqrt{\dfrac{T}{m}}=8](https://tex.z-dn.net/?f=v_1%3D%5Csqrt%7B%5Cdfrac%7BT%7D%7Bm%7D%7D%3D8)
For second cable
![v_2=\sqrt{\dfrac{T}{4m}}\\\Rightarrow v_2=\dfrac{1}{2}\sqrt{\dfrac{T}{m}}\\\Rightarrow v_2=\dfrac{1}{2}\times 8\\\Rightarrow v_2=4\ m/s](https://tex.z-dn.net/?f=v_2%3D%5Csqrt%7B%5Cdfrac%7BT%7D%7B4m%7D%7D%5C%5C%5CRightarrow%20v_2%3D%5Cdfrac%7B1%7D%7B2%7D%5Csqrt%7B%5Cdfrac%7BT%7D%7Bm%7D%7D%5C%5C%5CRightarrow%20v_2%3D%5Cdfrac%7B1%7D%7B2%7D%5Ctimes%208%5C%5C%5CRightarrow%20v_2%3D4%5C%20m%2Fs)
The speed of wave in cable two is 4 m/s
Answer:
F = 2.26 × 10⁻³ N
Explanation:
given,
length of rod = 11 cm
charge = 19 nC
linear charge density = 3.9 x 10⁻⁷ C/m
electric force at 2 cm away.
![E(r) = \dfrac{2K\lambda}{r}](https://tex.z-dn.net/?f=E%28r%29%20%3D%20%5Cdfrac%7B2K%5Clambda%7D%7Br%7D)
F = E q
![F= \dfrac{2K\lambda\ q}{L}\int \dfrac{dr}{r}](https://tex.z-dn.net/?f=F%3D%20%5Cdfrac%7B2K%5Clambda%5C%20q%7D%7BL%7D%5Cint%20%5Cdfrac%7Bdr%7D%7Br%7D)
integrating from 0.02 to 0.02 + L
![F= \dfrac{2K\lambda\ q}{L}[ln(0.02+L)-ln(0.002)]](https://tex.z-dn.net/?f=F%3D%20%5Cdfrac%7B2K%5Clambda%5C%20q%7D%7BL%7D%5Bln%280.02%2BL%29-ln%280.002%29%5D)
![F= \dfrac{2\times 9 \times 10^9\times 3.9\times 10^{-7}\times 19 \times 10^{-9}}{0.11}[ln(0.02+0.11)-ln(0.002)]](https://tex.z-dn.net/?f=F%3D%20%5Cdfrac%7B2%5Ctimes%209%20%5Ctimes%2010%5E9%5Ctimes%203.9%5Ctimes%2010%5E%7B-7%7D%5Ctimes%2019%20%5Ctimes%2010%5E%7B-9%7D%7D%7B0.11%7D%5Bln%280.02%2B0.11%29-ln%280.002%29%5D)
F = 2.26 × 10⁻³ N
Answer:
The graph shows direct proportion because it is a straight line
through the origin.
Explanation: