Define MA in terms of load arm and effort arm.? When does MA become more than or less than 1?

Label the load arm and effort arm in the figure.

Why does rain water have pH less than 7 ?

Is ammonia more dense or less dense than air?

Why does ozone have a bond angle less than 120^(@) ?

Draw a simple diagram ofa fire tongs and mark on it the fulcrum F and the points of application of load L and effort E. (a) Name the class of lever. (b) if load arm is 15 cm and effort arm is 5 cm. what is its mechanical adavantage?

Find the 4 terms in G .P. in which 3rd term is 9 more than the first term and 2nd term is 18 more than the 4th term.

A machine works as a (i) force multiplier, (ii) speed multiplier. In each case state whether the velocity ratio is more than or less than 1.

A lever of length 9 cm has its load arm 5 cm long and the effort arm is 9 cm long. (a) to which class does it belong ? (b) Draw a diagram of the lever showing the position of the fulcrum F and directions of both the load L and effort E. (c) what is the mechanical advantage and velocity ratio if the efficiency is 100%? (d) What will be the mechanical advantage and velocity ratio if the efficiency becomes 50%?

Which measure of central tendency is given by the x -coordinate of the point of intersection of the more than ogive and less than ogive?

Using the number line, find the integer which is : a. 5 more than -7 b. 7 less than 3