2. A 2 kg cart uses 5 N applied over 4 s to go from rest to 10 m/s. The magnitude of the impulse applied to the cart is?

the higher the current the higher the mag field around it the higher the influence on the compass

the old price per ounce is c/4.

the new price per ounce is c/3.6.

the ratio of the old price to the new one is

(c/4)/(c/3.6) = (c/c)×(3.6/4) = 0.9 . . = 9/10 . . "nine tenths" in either form