Recently, i read a car manual about changing a tire on my vehicle. it recommended using 100 ft·lbs of torque to tighten the bolts that hold the tire in place. i could use a torque wrench which measures the amount of torque applied when tightening a bolt. if the wrench i use is 40 cm long and i push on the very end of it, how much force, in newtons, must i use if the force i apply is perpendicular to the wrench?

Heena wants to measure the volume of a ball that is 24 cm across. how should she set up her equation?

(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?

The california mussel (mytilus californianus) attaches itself to a rock or other solid surface with a bundle of filaments known as the byssus. imagine that 15.0 j of work is done to stretch the distal end of the byssus. it releases 10.8 j of thermal energy as it relaxes. what is the resilience of the distal end of the byssus?