The volume V of a cone of height h and radius r is given by the expression: V=πr^2h / 3 In a particular experiment, there is a 5% uncertainty in V and a 2% uncertainty in r. What is the percentage uncertainty in h?​

Relative to the ground below, how many joules of potential energy does a 1000-kg boulder have at the top of a 5-m ledge?

When a charged balloon sticks to a wall, the downward gravitational force is balanced by an upward static friction force. the normal force is provided by the electrical attraction between the charged balloon and the equal but oppositely charged polarization induced in the wall's molecules. if the mass of a balloon is 1.2 g, its coefficient of static friction with the wall is 0.71, and the average distance between the opposite charges is 0.80 mm, what minimum amount of charge must be placed on the balloon in order for it to stick to the wall? express your answer to two significant figures and include appropriate units.

Involves organizing and breaking down information into easier groups to expand capacity. rehearsal is the verbal repetition of information. these techniques are especially important for the improvement memory.