The graph shows the change in temperature of a sample of water in a closed system as thermal energy is added over time. Temperature: -50oC; 0oC; 50oC; 100oC; 150oC;
Time: 10; 20; 30; 40; 50; 60;
What happens to the speed of the particles of the water undergoes a change of state?
A. it remains the same.
B. it increases gradually
C. it comes to a complete stop
D. it decreases gradually

Which instrument is used to measure air temperature

Unpolarized light of intensity i_0=750w/m^2 is incident upon two polarizers. after passing through both polarizers the intensity is i_2=280w/m^2. (a) what is the intensity of the light after it passes through the first polarizer in w/m^2? (b) write an equation for the angle between the polarizers in terms of the initial (i_0) and final (i_2) intensities. (c) find the angle between the polarizers in degrees.

World class speed skaters can skate a 3,000-m course in about 4 minutes. what is their average speed for this course? a. 12.5 m/sb. 1.33 m/sc. 1.25 m/sd. 13.3 m/s