If a positively charged particle moves into a magnetic field traveling in a straight line, how would you expect its motion to change? a) the particle would slow and stop moving. b) the particle would travel in a curved path. c) the particle would continue traveling in a straight line. d) the particle would make a right angle turn and then continue traveling in a straight line. answer is b

Consider a 1000 w iron whose base plate is made of 0.5 cm thick aluminum alloy 2024-t6 (ρ = 2770 kg/m3 and cp = 875 j/kg°c). the base plate has a surface area of 0.03 m2. initially, the iron is in thermal equilibrium with the ambient air at 22°c. assuming 90% of the heat generated in the resistance wires is transferred to the plate, determine the minimum time needed for the plate temperature to reach 200°c.