Answer:
Part a)

Part B)

Explanation:
As we know that when both the forces are acting on the object in same direction then we will have

as we know that

m = 10.6 kg
now we will have


Now two forces are in opposite direction then we have


Part A)
Now we will have from above two equation

Part B)
Similarly for other force we have

For 40 hours, she gets paid $340
Therefore, for 1 hour, she gets paid 340/40=$8.50
Her hourly wage is $8.50
Explanation:
Work cannot be increased by using a machine of some kind.
Answer:
There are 6.87 x 1023 atoms in 1.14 mol SO3, or sulfur trioxide :
It is A. a refrigerator cause a alternating current is current that doesn't stop and the refrigerator is plug into the wall.