Which material is the least dense? a. lead b. brick c. copper d. platinum

Aforce of 240.0 n causes an object to accelerate at 3.2 m/s2. what is the mass of the object?

An object is 10 cm from the mirror, its height is 1 cm and the focal length is 5 cm. what is the image height? (indicate the object orientation by including the + or - sign with the answer.) hi = cm +1 -1 +10 -10

Why is it important always to use horizontal bars in unit fractions when performing unit conversions?