Assume you are driving at the speed limit v0. as youapproach an intersection 22.0 m wide, you see the light turnyellow. during your reaction time of 0.600 s, you travel atconstant speed as you recognize the warning, decide whether to stopor to go through the intersection, and move your foot to the brakeif you must stop. your car has good brakes and can accelerate at-2.40 m/s2. before it turns red, the light should stayyellow long enough for you to be able to get to the other side ofthe intersection without speeding up, if you are too close to theintersection to stop before entering it.
(a) find the required timeinterval δty that the light should stay yellow interms of v0.
(b) v0= 8.00 m/s = 28.8 km/h.
(c) v0 = 11.0 m/s = 40.2km/h.
(d) v0 = 18.0 m/s = 64.8 km/h.
(e)v0 = 25.0 m/s = 90.0 km/h. what if?
(f) v0 approaching zero.
(g) v0approaching infinity.
(h) describe the pattern of variation ofδty with v0. you may wish also to sketcha graph of it. account for the answers to parts (f) and (g)physically.
(i) for what value of v0 wouldδty be minimal.
(j) what is the minimum timeinterval? suggestion: you may find it easier to do part (a) afterfirst doing part (b).

For problems 1-3, consider a simple dc brush motor with a permanent magnet stator. with an an consider a simple dc brush motor with a permanent magnet ae supply voltage of 100 v, the no-load speed of the motor is 1000 rpm. this motor can provide a torque of 1.9 n-m at 800 rpm drawing a current of 2 a current are both zero at no load.) 1. with an armature supply voltage of 100 v, the motor is operated at 900 rpm. what is the motor torque? what is the mechanical power delivered by the motor? what is the current draw? what is the electrical power input? what is the energy efficiency of the motor? with an armature supply voltage of 100 v, the motor is operated at 1100 rpm (where it acts as a generator). what torque input is required? what mechanical power is required what current is generated? what is the electrical power generated? what is the energy efficiency of the motor acting as a generator? 2. with an armature supply voltage raised to 120 v, the motor is operated at 1000 rpm. what is the no-load speed? what is the motor torque? what is the mechanical power delivered by the motor? what is the current draw? what is the electrical power input what is the energy efficiency of the motor? 3.

Answer as quick as ! 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 energyb. motion energyc. sound energyd. thermal energy

Ms.hidalgo opens the door to her classroom. her classroom is 60 degrees and the air outside is 80. predict what will happen using your knowledge of how heat flows.