The weather report never tells the "humidity" of the air. It tells the
"RELATIVE humidity". That's the percent of the moisture the air
COULD hold at the current temperature that it's actually holding
right now.
If the air is completely dry, then it's holding NONE of the moisture
that it COULD hold, and the relative humidity is zero percent.
Answer:
Explanation: r₂ = 15 x 10⁻³ m ; r = 12 x 10⁻³m ; r₁ = 10 x 10⁻³ m
E = Q /4π∈r²x ( r³ - r₁ ³) / ( r₂³ - r₁³ )
= 15 x 10⁻⁶ x 8.99 x 10⁹x( 12³ - 10³ ) / ( 15³- 10³ ) X 12³
= 23.92 N/C
I’m pretty sure that if an acid and base react the products will be a salt
Magnitude is basically the measurement,
distance is the total ground that you covered. If you started at point a, walked ten feet to point b, then turned around and walked 13 feet to point c, your total distance would be 10 + 13 = 23 feet
using the same example, your displacement is only how far away you are from the starting point. So point b doesnt matter, because you end up passing through point a again (I hope that made sense :o) and the magnitude of your displacement would be 3 feet
The horizontal speed has no effect on how long it takes to reach the ground.
A bullet shot from a gun and a bullet dropped from the front end of the gun
at the same time as the shot both hit the ground at the same time.
The number that counts is the height from which it fell . . . the 1.25 m.
I'll use this very useful formula:
Distance of free fall,
starting from rest = (1/2) · (gravity) · (time)²
1.25 m = (1/2) · (9.8 m/s²) · (time)²
Divide each side
by 4.9 m/s² : 1.25 m / 4.9 m/s² = time²
0.2551 sec² = time²
Square root each side: 0.505 sec = time
It looks like the correct choice is approximately 'A'. (rounded)