Answer:
chimical change...or phisical...one or the other...
Explanation:
15 km 30 divided by 4 is 7.5 km in 30 min times that by 2 the answer is 15
Answer:
It's either B or D, I'm not positive which it is
Explanation:
Answer:
a. 240 N due east
b. 540 N due west
Explanation:
Let east be the reference direction
(a) if the resultant force has a magnitude of 390 N and points east, and the 1st force is 150N due East, then the additional force would also due east and has a magnitude of
390 - 150 = 240 N
(b) if the resultant force has a magnitude of 390 N and points west, it would be -390N is eastern reference, and the 1st force is 150N due East, then the additional force would also due east and has a magnitude of
-390 - 150 = -540 N
This force would point west