Answer:
26.4 m/s
Explanation:
4 g = 0.004 kg
By the law of momentum conservation, the momentum before and after the impact must be the same
So the speed of the block after the impact is 26.4 m/s
Answer: 1.62 m
Explanation: In order to solve this problem we have to use the definition of Coulomb force whic is given by:
F=(k*q1*q2)/d^2 where k is a constant 9*10^9 N/C^2*m^2. d is the distance between tha charges q1 and q2.
then we can:
d^2= (k*q1*q2)/F= (9*10^9*30.3*10^-6*68.2*10^-6)/7.09=1.62 m
(note we have considered q2 as positive because we are determining d^2 by using the magnitude of the electric Force bewteen the charges).
Answer:
In Step 5, you will calculate H+/OH– ratios for more extreme pH solutions. Find the concentration of H+ ions to OH– ions listed in Table B of your Student Guide for a solution at a pH = 2. Then divide the H+ concentration by the OH– concentration. Record these concentrations and ratio in Table C.
What is the concentration of H+ ions at a pH = 2?
0.01 mol/L
What is the concentration of OH– ions at a pH = 2?
0.000000000001 mol/L
What is the ratio of H+ ions to OH– ions at a pH = 2?
10,000,000,000 : 1
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I LITERALLY spent 40 MINUTES trying to figure out this question, so please, use my VERY CORRECT answers!
I hope this helps!
D)LT^-1 speed=distance(L)/time(T)——>L/T
