As a city planner, you receive complaints from local residents about the safety of nearby roads and streets. one complaint concerns a stop sign at the corner of pine street and 1st street. residents complain that the speed limit in the area ( 89 km/h) is too high to allow vehicles to stop in time. under normal conditions this is not a problem, but when fog rolls in visibility can reduce to only 47 meters. because fog is a common occurrence in this region, you decide to investigate. the state highway department states that the effective coefficient of friction between a rolling wheel and asphalt ranges between 0.689 and 0.770 , whereas the effective coefficient of friction between a skidding (locked) wheel and asphalt ranges between 0.450 and 0.617 . vehicles of all types travel on the road, from small cars with a mass of 571 kg to large trucks with a mass of 3991 kg. considering that some drivers will brake properly when slowing down and others will skid to stop, calculate the minimum and maximum braking distance needed to ensure that all vehicles traveling at the posted speed limit can stop before reaching the intersection.

Aroll in a paper machine is powered by a separately excited dc machine. operating point 1 (under load): the roll typically operates at 764 rpm and must provide 301 nm of torque to oppose the load of the paper. the armature voltage is 230v for this operating point operating point 2 (no load): when the load is removed the speed of the roll increases to 900 rpm (the field characteristics are unchanged) la ea dev m (a) calculate the maximum torque (units of nm) that the motor can supply with this applied voltage (b) calculate the value of the armature resistance, ra (in ohms) (c) at operating point 1 (loaded condition), the field current, i, and the total input power (armature field), are measured to be to be 10 a and 28,600 w respectively. use this information to calculate the value of the field resistance, rf (in ohms). (d) (d) at operating point 1 (loaded condition), calculate the motor efficiency. express your answer as a percent to at least 2 significant digits. (d) if the field voltage is reduced by 1/2, calculate the new stall torque (in nm) of the motor (f). if the field voltage is reduced by 1/2, calculate the new no-load speed (in rad/sec)

Will give brainliest! which statement best describes the similarities between fundamental forces? electromagnetic and strong nuclear forces influence the interaction between charged particles within an atom. gravitational and magnetic forces are both types of charges that occur in nature. nuclear and magnetic forces are both related to mass and weight. strong nuclear force is most like electrical force because they are both related to distance.

What are similarities and differences of reflection, refraction, diffraction and absorption?