Which of the following statements about hearing protection are true?

Fact or characteristics of nucleic acid

An airplane travels from st louis to portland, oregon in 4.33 hours. if the distance traveled is 2,742 kilometers, what is the airplanes average speed

Which will stay warmer longer a cup of coffee or a cup of coffee being stirred why?

Which of the following is true of the inner core of the earth? A. It is the consistency of asphalt. B. The average temperature is 4000 degrees. C. It is so hot that the elements vibrate in place. D.

If two or more elements are involved in a chemical reaction they will most likely form a? compound atom isotope mixture

Changing the direction of current will or will not affect the strength of an electromagnet

A swimming pool has the dimensions of 10 meters, 5 meters, and 1 meter. What is the pool's volume? 50 m 50 m3 50 m2 25 m3

A child pushes horizontally on a box of mass m which moves with constant speed v across a horizontal floor. The coefficient of friction between the box and the floor is μ. At what rate does the child do work on the box?

What two qauntities must be known to calculate the density of a sample of matter

An element's atomic number is 38. How many protons would an atom of this element have?