How are waves used on an everyday basis?

2. If the efficiency of a device is 64 %, what is the amount of Energy lost / wasted by this device? Explain

A current of I = 3.8 A is passing through a conductor with cross sectional area A = 2.5 x 10^-4 m^2. The charge carriers in the conductor, electrons, have a number density n = 1.3 x 10^27 m^-3. (a) Express the drift velocity of electrons through 1.

Calculate the wave speed i the wavelength = 64m and the wave period = 4s

Which index of refraction represents the most optically dense material? a. 1.58 b. 1.77 c. 2.42 d. 2.65

When starting a foot race, a 70.0-kg sprinter exerts an average force of 650 n backward on the ground for 0.800 s. what is his final speed?

If two plates diverge at a rate of 1.3 cm/year, how much farther apart will the plates be after 200 million years?

What is root-mean-square current?

Which of these is an element? O carbon O air O carbon dioxide water

What could result if the liver was not working properly?

A machine gun fires 10 rounds per second. The speed of the bullets is 300 m/s. What is the distance between the flying bullets?