When two or more waves are at the same place at the same time, which phenomena occurs

Define the emission spectrum.

A favorable entropy change occurs when δs is positive. what can be said about the order of the system when δs is positive?

A painter on a ladder, painting the ceiling of a room comments. "It is hotter up here by the ceiling than it is down on the floor". Explain why his observation is correct.

A current of 9 a flows through an electric device with a resistance of 43. what must be the applied voltage in this particular circuit? a. 387 v b. 4.8 v c. 387 a d. 4.8 a

Which explains why more energy is released in nuclear reactions then in chemical reactions

An object has an acceleration of 24 m/s/s. How long would it take the stationary object to reach a velocity of 6.8 m/s?

What is normal distribution in statistics?

Which of the following water samples would be considered acidic

A linearly-polarized electromagnetic (EM) wave has an electric field with amplitude 1000 V/m. You hold a a linear polarizer in front of it and rotate the polarizer so that all of the EM wave is blocked. You then rotate the polarizer 30 degree.

Let y'=4 x. find all values of r such that y = rx^{2} satisfies the differential equation. if there is more than one correct answer, enter your answers as a comma separated list.