Consider the unbalanced equation for the oxidation of aluminum. _al + _o2 right arrow. _al2o3 which sequence of coefficients should be placed in the blanks to balance this equation?.

Which of the following always exist between two objects having mass ● elastic force ● contact force ●gravitational force ●magnetic force

Blank is the amount of energy in a sound wave per unit of time and is also related to the loudness of a sound

On a test the graders have a mean of 77 and a standard deviation of 8. if we can approximate the distribution of these graders by a number distribution what percent of the students. a) scores higher than 77? b) should pass the test (grades > 60)? c) should fail the test (grades < 60)?