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A 50.0 kg grindstone is a solid disk 0.520 m in diameter. You press an ax down on the rim with a normal force of 160 N. The coefficient of kinetic friction between the blade and the stone is 0.60, and there is a constant friction torque of between the axle of the stone and its bearings. How much force must be applied tangentially at the end of a crank handle 0.500 m long to bring the stone from rest to in 9.00 s? Use three significant digits.

A metal bar is in the xy-plane with one end at the origin. A force: is applied, where the vector from the origin is . Find the magnitude of the torque, in Nm, with respect to the origin produced by . Provide your answer to three significant figures. 

Freckles (F) is a trait that is dominant to not having freckles (f). On a separate chromosome, having a widow’s peak (W) is dominant over having a straight hairline (w). A woman who is heterozygous for both traits wants to have children with a man who is heterozygous for widow’s peak and homozygous recessive for the freckles trait. What percentage of their children will have a straight hairline and have freckles?

Daytime temperatures in a desert can reach 45.0 degrees Celsius.  What is this temperature on the Fahrenheit temperature scale?  

Using the diagram below, which of the following groupings has identified the periodic table groups correctly?  

A typical nucleotide is composed of ____________________.

Given a solution of 12.0 M HCl that needs to be diluted to prepare 0.3 L of a 0.6 M solution, how much volume of the 12.0 M solution would need to be diluted?   M1V1 = M2V2 

  How many valence electrons does oxygen have?

  Rutinose is a disaccharide that has the molecular formula of C12H22O10.  What is the molecular weight of Rutinose?

Label the images below as carbohydrate, lipid, nucleic acid, or protein