Suppose a bonfire emits co at the rate of 20 g/s on a clear night when the wind is blowing at 2m/s. if the effective stack height at the fire is 6 m, (a) what would you expect the ground-level co concentration to be at 400 m downwind?

here we know that ball will drop down by total distance 3.2 m

so here we know that

now using kinematics

now in the same time it will cover horizontal distance of 0.75 m

so speed of the ball will be

a displacement distance is size of displ

when a device is used in a circuit in which the voltage is 81 v, the current flowing through the device is 3 a. what is the resistance of the device?

a. 27 ω

b. 40.5 a

c. 243 ω

d. 243 a

the correct answer is a. 27

b. a lightning bug, plug of grass, and a worm