Aroad engineer designs exit ramp of the ac expressway with a banked curve to allow a car to travel on the ramp with a speed of 40 mph when the ramp is ice covered and the coefficient of friction is zero. the curve has a radius of 35.0 meters.
a.) at what angle is the curve banked?
b.) if the coefficient of friction is normally 0.2, what is the maximum speed a car can negotiate the curve?
c.) if the coefficient of friction is normally 0.2, what is the minimum speed a car can negotiate the curve?

Click the game tab at the bottom of the simulation and select level 1. (there is no seesaw balance for this part of the activity.) balance the first equation, and click check to see if you got it right. if you can’t balance it in the first try, you can try again. work through the five equations for level 1. click continue to go on to level 2, and later level 3. each level is more difficult than the one before. keep trying until all the equations are balanced. in one or two sentences, describe how you did in the balancing game. in a few more sentences, explain one strategy you learned for balancing more complex equations.

Atoaster oven has a resistive heating element. the average rate at which it dissipates energy as thermal energy is 1.00 \(\rm kw\). in the united states, emf amplitude in household circuits is \(\mathcal e_{\max}\) = 170 \({\rm \; v}\) and the \(\rm ac\) oscillation rate is 60 \(\rm hz\). part a what is the root-mean-square current through the heating element?

Which of these is the best way to manage a natural resource