Answer:
Car 1
Explanation:
The steering column which moves the least is less likely to to the driver's chest ordinarily. Driver tends to remain in motion until restrained. Assuming a seat belt not airbag
Generally one would compute a vector find direction and distance. This is like solving for a hypotenuse / in a right angled triangle problem. On face value the column moving the least is safer. The 6/24 would hit the upper chest, face, or possibly break the neck.
hence, car 1 moved 3 cm upward and 2 cm rearward is safer.
Answer:
(a) 8 V, (b) 144000 V, (c) 2 x 10^(-8) C
Explanation:
(a) charge, q = 5 μC , Work, W = 40 x 10-^(-6) J
The electric potential is given by
W = q V
![40\times10^{-6}=5 \times10^{-6}\times V\\\\V = 8 V](https://tex.z-dn.net/?f=40%5Ctimes10%5E%7B-6%7D%3D5%20%5Ctimes10%5E%7B-6%7D%5Ctimes%20V%5C%5C%5C%5CV%20%3D%208%20V)
(b)
charge, q = 8 x 10^(-6) C, distance, r = 50 cm = 0.5 m
Let the potential is V.
![V =\frac{k q}{r}\\\\V =\frac{9\times 10^{9}\times 8\times 10^{-6}}{0.5}\\\\V =144000 V](https://tex.z-dn.net/?f=V%20%3D%5Cfrac%7Bk%20q%7D%7Br%7D%5C%5C%5C%5CV%20%3D%5Cfrac%7B9%5Ctimes%2010%5E%7B9%7D%5Ctimes%208%5Ctimes%2010%5E%7B-6%7D%7D%7B0.5%7D%5C%5C%5C%5CV%20%3D144000%20V)
(c)
Work, W = 8 x 10^(-5) J, Potential difference, V = 4000 V
Let the charge is q.
W= q V
![8\times10^{-5}= q\times 4000\\\\q =2\times 10^{-8} C](https://tex.z-dn.net/?f=8%5Ctimes10%5E%7B-5%7D%3D%20q%5Ctimes%204000%5C%5C%5C%5Cq%20%3D2%5Ctimes%2010%5E%7B-8%7D%20C)
Out of the choices given, the statement about how light travels is "<span>Light can travel in a vacuum, and it travels faster if the light source is moving."</span>
Well, it happens a few weeks ahead, then for a total of 3 hours and 40 minutes.