A cop is traveling at a velocity of 24.17 m/s when he is passed by a speeding car traveling at a velocity of 40.29 m/s and accelerating uniformly at 1.77 m/s^2 At the moment the speeding car passes him, the cop accelerates uniformly at 3.31 m/s^2. How long does the cop take to catch up to the speeding car?
1. 11.368 s
2. 23.761 s
3. 20.935 s
4. 26.127

The discovery that the universe appears to be expanding led to a widely accepted theory called a.) the big bang theory b.) the doppler effect c.) hubble’s law d.) solar nebular theory e.) the seyfert theory

An electric current is flowing through the cord below.what will happen to this current if a magnet is brought near the cord? a. the electric current will stop flowing. b. it will exert a force on the voltage. c. the resistance of the wire will decrease. d. it will exert a force on the electric current.

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.