Suppose a logs mass is 5kg. after burning, the mass of the ash is 1kg. explain what may have happened to the other 4kg

How do you think altering factors like wavelength and frequency affect they way we see and hear?

An alert physics student stands beside the tracks as a train rolls slowly past. He notes that the frequency of the train whistle is 491 Hz when the train is approaching him and 472 Hz when the train is receding from him.

What factors that affect friction?

1. x-rays of wavelength 0.138nm fall on a crystal whose atoms, lying in planes, are spaced 0.285 nm apart. At what angle with the surface must the x-rays be directed if the a. first diffraction maximum is observed? b.

What is the equation to find wavelength of red light with a frequency of 4 x 10^14

What would result from under-coverage? A. a lack of accurate result B. an incorrect independent variable C. an experiment D. accurate result

What can be said about the force of gravity acting on an object that is floating stationary underwater and not moving up or down? A. The buoyant force equals the force of gravity, so there is no net force. B.

A frog in a hemispherical pod finds that he just floatswithout sinking in a fluid of density 1.25 g/cm3. If the pod has a radius of3.00 cm and negligible mass, what isthe mass of the frog?

What is the reasonable estimate for Lim g (x)

Do tides depend more on the strength of gravitational pull or on the difference in strengths? explain.