Leila drove to the mountains last weekend. there was heavy traffic on the way there, and the trip took 10 hours. when leila drove home, there was no traffic and the trip only took 7 hours. if her average rate was 18 miles per hour faster on the trip home, how far away does leila live from the mountains?

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

(2) (a) you have a simple circuit that consists of only a battery (δvbat=1.5v) and two resistors with resistance r1=10ω and r2=5ω, connected in series with each other. what is the current running through the battery? (b) you re-arrange your circuit so now r2 is attached in parallel to r1 rather than in series. what is the current running through the battery? (c) you add an additional resistor r3=7ω on the same branch as r2. what is the current running through the battery? (d) what is the power dissipated in r3?

Ways that industry and agriculture use physical properties to separate substances