A 4.0m long steel, beam with a cross-sectional area of 1.0 x10-2m² and a young's modulus of
2.0 x1011 N/m2 is wedged horizontally between
two vertical walls. In order to wedge the beam,
it is compressed by 0.020mm. If the coefficient
of static friction between the beam and the walls
is 0.70 the maximum mass (including its own) it
can bear without slipping is :
(1) O
(2) 3.6kg
(3) 36kg
(4) 710kg

Ablock of steel has a density of 0.29lbs per cubic inch. if the block has dimensions of 1 inch by 1 inch by 3 inches, what is its weight? a. 0.29lbs b. 0.58lbs c. 0.87lbs d. 1lbs

Electroplating is a way to coat a complex metal object with a very thin (and hence inexpensive) layer of a precious metal, such as silver or gold. in essence the metal object is made the cathode of an electrolytic cell in which the precious metal cations are dissolved in aqueous solution. suppose a current of 480.ma is passed through an electroplating cell with an aqueous solution of agno3 in the cathode compartment for 46.0 seconds. calculate the mass of pure silver deposited on a metal object made into the cathode of the cell. round your answer to 3 significant digits. also, be sure your answer contains a unit symbol. ×10μ

The frequencies refer to the sample data collected from a population of interest when performing a hypothesis test comparing two or more population proportions.