An object 5 millimeters high is located 15 millimeters in front of a plane mirror. how far from the mirror is the image located?
a) 5 millimeters
b) 7.5 millimeters
c) 15 millimeters
d) 30 millimeters

Acatapult is tested by roman legionnaires. they tabulate the results in a papyrus and 2000 years later the archaeological team reads (distances translated into modern units): range = 0.4 km; angle of launch = π/5 rad; landing height = launch height. what is the initial velocity of launch of the boulders if air resistance is negligible?

What can change the speed of sound as it travels through the ocean? a. salinity only b. density and salinity c. salinity and distance from land d. density and distance from land

Element with 5protons and 3neutrons