Consider the free-body diagram. Assume there is a net force of 30N to the right and the friction force equals 20N. What is the applied force in this situation? A.) 20N
B.) 30N
C.) 50N
D.) 80N

How many molecules are present in 3 mols of silicon dioxide (sio2)?

Which of the following changes will result in a stronger electromagnet? a. using fewer coils of wire b. using a higher voltage c. using a shorter nail d. using a longer wire

Cathy is pedaling down a steep hill on her bicycle and wants to be able to coast up the next hill, which is 25 meters high, without pedaling. cathy and her bicycle have a mass of 75 kg. assuming her bicycle is 100% efficient, what would her speed have to be?