It requires 350 joules to raise a certain amount of a substance from 10.0°c to 30.0°
c. the specific heat of the substance is 1.2 j/g°
c. what is the mass?

An object moves from position +34m to the position -15m in 15 seconds. what is the total displacement? what is the total velocity?

Ais not a mixture. colloid compound suspension solution

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?