State two uses of total internal reflection

Why do we believe that most of the mass of the milky way is in the form of dark matter?

Explain how the absorption of sound waves differs from the transmission of sound waves

What is the sum of the kinetic energies of the alpha particle and the new nucleus?

You did 150 joules of work lifting a 120-newton backpack. a. How high did you lift the backpack? b. How much did the backpack weigh in pounds?

A batter hits a 0.140-kg baseball that was approaching him at 19.5 m/s and, as a result, the ball leaves the bat at 44.8 m/s in the reverse of its original direction. The ball remains in contact with the bat for 1.7 ms.

In which situation would a space probe most likely experience centripetal acceleration?

Oil is less dense than water, which is less dense than syrup. If you put these three liquids in a column, in what order would they layer from top to bottom?

Rhea kicks a soccer ball at 13 km/h to Sean. After kicking the ball, the speed of the soccer ball from Rhea's reference frame is 13 km/h. The speed of the soccer ball from Sean's reference frame is 22 km/h. a.

How is using a digital signal like turning on and off a regular light switch?

Who were the 26 or 27 scientists that found the elements on the periodic table?