Answer:
Explanation:
The most common formula for average speed is distance traveled divided by time taken. The other formula, if you have the initial and final speed, add the two together, and divide by 2
He should a step-up transformer with k=220/120=1.83 so output coil must have 240*1.83=440 turns
Answer:
Tha valency of Oxygen is 2 because it need two atom of hydrogen to form water.
Answer:
Different forces (including magnetism, gravity, and friction) can affect motion
To solve this problem we will apply the concepts related to the balance of forces. We will decompose the forces in the vertical and horizontal sense, and at the same time, we will perform summation of torques to eliminate some variables and obtain a system of equations that allow us to obtain the angle.
The forces in the vertical direction would be,



The forces in the horizontal direction would be,



The sum of Torques at equilibrium,




The maximum friction force would be equivalent to the coefficient of friction by the person, but at the same time to the expression previously found, therefore


Replacing,


Therefore the minimum angle that the person can reach is 46.9°