The answer is Marie Skłodowska Curie (AKA Marie Curie). She <span>lived her life awash in ionizing radiation. She would be carrying bottles of the radium and polonium in the pocket of her coat and put them in her desk drawer.
So even after a century, her papers are still radioactive. Since the</span><span> most general isotope of radium, which is radium-226, has a half life of 1,601 years.</span>
Answer:
-611.32 N/C
0.43723 m
Explanation:
k = Coulomb constant = 
q = Charge = -4.25 nC
r = Distance from particle = 0.25 m
Electric field is given by
The magnitude is 611.32 N/C
The electric field will point straight down as the sign is negative towards the particle.
The distance from the electric field is 1.71436 m
The answer to that question is c. tamod
The diameter is about 100 times as great as the thickness.
V = speed of the plane with no wind = 250 mph
v = speed of wind
consider the motion of the plane while traveling with the wind :
V' = speed of plane travelling in the direction of wind = V + v = 250 + v
d' = distance traveled = 300 miles
t' = time taken to travel the distance
time taken to travel the distance is given as
t' = d'/V'
t' = 300/(250 + v) eq-1
consider the motion of the plane while traveling against the wind :
V'' = speed of plane travelling against the direction of wind = V - v = 250 - v
d'' = distance traveled = 200 miles
t'' = time taken to travel the distance
time taken to travel the distance is given as
t'' = d''/V''
t'' = 200/(250 - v) eq-2
Given that :
time taken to travel 300 miles = time taken to travel 200 miles
t' = t''
using eq-1 and eq-2
300/(250 + v) = 200/(250 - v)
3/(250 + v) = 2/(250 - v)
750 - 3 v = 500 + 2 v
5 v = 250
v = 50 mph
