In 2011, the percent deducted for Social Security was lowered to 4.2% to help stimulate the economy. How much did a taxpayer earning more than the maximum taxable income save in 2011 due to the lower rate?

What is the weight of a feather (mass = 0.0001 kg) that floats through earth's and the moon's atmospheres?

The force it would take to accelerate an 900-kg car at the rate of 6m/s2

Which of the following is a characteristic shared by both electron and light microscopes? a. they both employ the use of objective lenses. b. both microscopes require an internal camera to visualize the specimen. c. both microscopes have a resolving power of 0.01 nm. d. they both utilize white light to magnify the specimen.