While mowing your lawn, you push a lawnmower 120. m with a constant force of 300. n. how much work have you done, assuming that all force is in the same direction as the direction of motion? express your answer in scientific notation.

a)2.5 x 101 j
b)2.50 x 101 j
c)3.6 x 104 j
d)3.60 x 104 j

Kate is working on a project in her tech education class. she plans to assemble a fan motor. which form of energy does the motor convert most of its electric energy into? a. light energy b. motion energy c. sound energy d. thermal energy

This is for my 8th grade science class, i really don’t understand. can someone me? , lol.

Consider the growth of a 20-nm-diameter silicon nanowire onto a silicon wafer. the temperature of the wafer surface is maintained at 2400 k. assume the thermal conductivity of the silicon nanowire is 20 wm-1k-1 and all its surfaces including the tip are subjected to convection heat transfer with the coefficient h = 1×105 wm-2k-1 and t∞ = 8000 k. when the nanowire grows to l = 300 nm, what is the temperature of the nanowire tip (t (x =