Would switching your home from incandescent to compact fluorescent bulbs be a measure you would take? Why or why not? Explain your answer
What will be an ideal response?
We hope that they will make such a change. To be sure, the initial investment is
high, and some families might be too poor to afford the cost, even though they would
recoup the cost very rapidly. Look for some logic in the students' explanations.
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Snell's Law: A light beam having a wavelength of 470 nm in air is directed into glycerine at an angle of 75.0° with the normal in air. Glycerine has a refractive index of 1.47. (c = 3.0 × 108 m/s)(a) What are the frequency and wavelength of the light in the glycerine?(b) What angle does the light beam make with the normal in the glycerine?
What will be an ideal response?
An ac source of period T and maximum voltage V is connected to a single unknown ideal element that is either a resistor, and inductor, or a capacitor
At time t = 0 the voltage is zero. At time t = T/4 the current in the unknown element is equal to zero, and at time t = T/2 the current is I = -Imax, where Imax is the current amplitude. What is the unknown element? A) a resistor B) an inductor C) a capacitor D) an inductor or a capacitor
Identify path D in the figure as isobaric, isothermal, isovolumetric, or adiabatic
A pair of observers moving relative to one another will always agree upon all but which of the following:
A. the length of a space-time interval between two events B. their respective rest masses C. whether two events are simultaneous D. their relative velocity E. the relativistic factor gamma that links their reference frames