Answer:
The value is
Explanation:
From the question we are told that
The sound level is
The distance from the source is d = 1 m
The number of sources is n = 18
Generally the sound which the person is been exposed to is mathematically represented as
=>
=>
Answer:
I think its B
Explanation:
because "This means that when you rubbed the plastic comb along your hair, your hair resisted the movement of the comb and slowed it down. The friction between two surfaces can cause electrons to be transferred from one surface to the other."
Answer:
The correct answer is option a.
Explanation:
Conservation of momentum :
Where :
= masses of object collided
= initial velocity before collision
= final velocity after collision
We have :
Two equal-mass carts roll towards each other.
Initial velocity of
Initial velocity of (opposite direction)
Final velocity of (same direction )
Final velocity of (same direction)
v = 0.5 m/s
rg135
The speed of the carts after their collision is 0.5 m/s.
Please solve it ,,,,,,,,,,................................
fredd [130]
Answer:
the distance covered by the body in 5th second =u+a(n- 1/2)=7+4(5- 1/2)
=7+4×9/2
=7+18
=25m
Answer:
0N
Explanation:
Parameters given:
Q1 = Q2 = Q3 = 100 * 10^(-9) C
r = 0.3 m
The net force on the middle charge is:
F = F(1,2) + F(2,3)
Where F(1,2) = force due to Q1 on Q2
F(2,3) = force due to Q3 on Q2
F(1,2) = k*Q(1)*Q(2)/r²
F(1,2) = [9 * 10^9 * 100 * 10^(-9) * 100 * 10^(-9)]/(0.3²)
F(1,2) = 0.001N
F(2,3) = k*Q(2)*Q(3)/r²
F(2,3) = [9 * 10^9 * 100 * 10^(-9) * -100 * 10^(-9)]/(0.3²)
F(2,3) = -0.001N
Therefore,
F = 0.001 - 0.001
F = 0N