I believe the correct answer is B.<span>positively charged hair.</span>
Answer:
Speed, 
Explanation:
Given that,
Distance covered by the electron, d = 32 cm = 0.32 m
Time, t = 2 ns
We need to find the speed of an electron. Speed is equal to distance covered divided by time. So,
So, the speed of the electron is 
.
Answer:
μ = 0.189
Explanation:
The spring potential energy will convert to work of friction
Fd = ½kx²
μmgd = ½kx²
μ = kx²/2mgd
μ = 167(0.132²) / (2(2.77)(9.81)(0.284))
μ = 0.18852424...
Number of Washers . . . Total Mass . . . Total Force . . . Ratio
1 ................................................0.6 kg ................5.9 N ........... 9.83 N/kg
2 ................................................1.2 kg ...............11.8 N ............ 9.83 N/kg
3 ................................................1.8 kg ..............17.6 N ............. 9.78 N/kg
4 ...............................................2.5 kg .............24.5 N ............. 9.80 N/kg
5 ...............................................3.2 kg ..............31.4 N ............. 9.81 N/kg
The ratios are listed in the table.
The ratio seems to be constant, and not depend on the number of washers or the total mass. It's always about 9.8 Newtons per kilogram of mass. There must be something special about that number.
