A positive lens has a focal length of 6cm. An object is located 24cm from the lens. a. How far from the lens us the image?
b. is the image real or virtual, erect or inverted?

The position of a crate sliding down a ramp is given by x=(0.05t^3) m, y=(1.7t^2) m, z=(6−0.85t^5/2) m, where t is in seconds. (a) determine the magnitude of the crate's velocity when t = 2 s. (b) determine the magnitude of the crate's acceleration when t = 2 s.

An object weigh 40n in air ,weigh 20n when submerged in water, and 30n when submerged in a liquid of unknown liquid density. what is the density of unknown of liquid?

Select all the correct answers. which three statements about electromagnetic radiation are true?