In classical physics, where the speeds of source and the receiver relative to the medium are lower than the velocity of waves in the medium, the relationship between observed frequency f and …

The truck is moving away from the girl at =37.42ms^-1 This is an example of the Dopler's effect The speed of sound at 28^@C is c=331+0.6*28=347.8ms^-1 The observed frequency is …

Explanation: To calculate the molar mass of a compound, multiply the subscript of each element from the formula times the molar mass of the element. The molar mass of an element is its …

Add in something to describe the relative mass of the ball and the launcher. Because the ball has a much lower mass, yet both ball and launcher must have equal and opposite momentum, it …

The relative atomic mass of "M" is 6.94. The metal is lithium. > 1. Calculate the moles of "N". Assume that we have 0.673 g of "N". Then we have 1 g of "M" and 1.673 g of "M"_3"N". …

Using the isotopic masses and their relative abundance, the average atomic mass comes out to 24.3051 u . You work this out as a weighted average. Each isotope's mass is multiplied by its …

If object A moves to # (4 ,-1 )# and object B moves to # (7 ,1 )# over #3 s#, what is the relative velocity of object B from the perspective of object A? Assume that all units are denominated in …

Explanation: We only notice relative motion, so for example we see a rabbit running across the grass (static) and can tell it moves with a given speed in a certain direction compared to the field.

We also see from above equation (1) that with change in wavelength associated with light, its frequency changes. Larger wavelength will have smaller frequency and vice-versa. However, …

Use this equation to find the frequency of a photon that has a wavelength of #"12.4 cm"#. Notice that the speed of light is expressed in meters per second, so make sure that you convert the …