If a wheelchair-marathon racer moving at 13.1 miles per hour expends energy at a rate of 655 calories per hour, how much energy in calories would be required to complete a marathon race
(26.2 miles) at this pace?

Elements that do not have full outer electron shells will donate, share, or take electrons from other atoms. choose the items that have the correct binary ionic formula.

The blackbody curve for a star name zeta is shown below. what is the peak wavelength for this star ?

Which statement is true about hcl? (5 points) select one: a. it is a salt because it increases the concentration of metallic ions. b. it is a salt because it is formed by the reaction of an acid and a base. c. it is an acid because it increases the concentration of hydroxyl ions. d. it is an acid because it increases the concentration of hydronium ions.