Two photographers are competing for business in town. Andrea uses only film photography and Keira
uses only digital photography. Keira claims that the digital technology is superior, and her advertisement
claims that the images can be stored, shared, and copied more easily. They can even be sent long
distances using a series of wave pulses to transmit the information. Andrea replies that digital images
can be stolen and altered more easily.
Do the advantages outweigh the disadvantages, or do both sides have valid points? Support your answer
with at least three reasons.

Aparticle initially moving east with a speed of 20.0 m/s, experiences an acceleration of 3.95 m/s, north for a time of 8.00 s. what was the speed of the particle after this acceleration, in units of m/s? give the answer as a positive number.

Astudent is performing an experiment comparing sound and light waves. the student gathers the following data. what conclusion does the student most likely make based on this data? light waves always travel the same speed; however, the speed of sound is determined by the medium that it travels through. all sound waves always have the same energy, so the temperature of the medium does not affect wave speed. light needs to vibrate particles, so it travels fastest in tightly packed solids, while sound does not need a medium, so it travels fastest in a gas. tightly packed particles in solids slow down the light waves; however, sound waves make particles bounce into each other, so they travel faster in solids.

For waves in the ocean, the medium of the waves is a. air b. water c. energy d. a passing boat