You run a race with your friend. At first you each have the same kinetic energy, but then you find that she is beating you. When you increase your speed by 23%, you are running at the same speed she is. If your mass is 84 kg, what is her mass

The frequencies refer to the sample data collected from a population of interest when performing a hypothesis test comparing two or more population proportions.

Select all the correct answers. which three statements about electromagnetic radiation are true?

The illuminance of a surface varies inversely with the square of its distance from the light source. if the illuminance of a surface is 120 lumens per square meter when its distance from a certain light source is 6 meters, by how many meters should the distance of the surface from the source be increased to reduce its illuminance to 30 lumens per square meter?