Plants exhibit phototropism because
long roots plants absorb more water and nutrients
they need the sun's energy in order to produce food
water is essential to a plant's growth
strong stems are more wind resistant

wire in brush may conduct electricity from cell to drill and vice versa electrc shock possible

when a device is used in a circuit in which the voltage is 81 v, the current flowing through the device is 3 a. what is the resistance of the device?

a. 27 ω

b. 40.5 a

c. 243 ω

d. 243 a

the correct answer is a. 27