Use the method in which the components of vectors are used to find the magnitude and direction of the resultant 120 N bearing 90°: 160 N bearing 180°: 410 N bearing 0 and 60 N bearing 270°

When an object is heated it contracts. a. true b. false

Alead ball is dropped into a lake from a diving board 5m above the water . it hits the water with a certain velocity and then sink with constant velocity in bottom . it reaches the bottom 5 second after it is dropped if g= 10m/s2 . find depth of the lake and average velocity of the ball ?

Aresistor with an unknown resistance is connected in parallel to a 9 ω resistor. when both resistors are connected in parallel to an emf source of 21 v, the current through the unknown resistor is measured with an ammeter to be 4 a. what is the resistance of the unknown resistor? answer in units of ω.