1. how much work is done on a 20-n rock that you lift 1.5 meters up?
a) 3 joules
b) 30 joules
c) 3 watts
d) 30 watts

= 30 joules

Step-by-step explanation:

Work done is given by the product of Force and distance

Work done = Force × distance

Work is measured in joules.

Force = 20 N , distance = 1.5 m

Thus;

Work done = 20 N × 1.5 m

                  = 30 Joules

i dont know

step-by-step explanation:

umm. i dont know

irrational, then, just means all the numbers that aren't rational. every integer is a rational number, since each integer n can be written in the form n/1. however, numbers like 1/2, 45454737/2424242, and -3/7 are also rational, since they are fractions whose numerator and denominator are integers.

step-by-step explanation: