The timing device in an automobile's intermittent wiper system is based on an rc time constant and utilizes a 0.630 µf capacitor and a variable resistor. over what range (in mω) must r be made to vary to achieve time constants from 1.50 to 20.0 s?

Range of the resistance is given as

to

Explanation:

As we know that the time constant is the product of capacitance and the resistance of the the circuit

So here we know that the range of the time constant is varying from 1.50 s to 20.0 s

so here we have

now we have

now another time constant is

harry byrd declared organized resistance by southern states would prevent racial integration.

air exerts forces on falling objects near earth’s surface.

explanation:

the term 'free falls' refer to object that are falling towards the earth, in a situation in which gravity is the only force acting on the object.

for an object in free fall, the acceleration is constant (g, the gravitational acceleration), and so the velocity of the object constantly increases.

for objects near earth's surface, there is always another force acting on the object: the resistance due to the air. this force is opposed to the direction of fall of the object, and it is proportional to the velocity of the object, so as the object falls down, this force increases up to a point when it balances the force of gravity, and the object continues its motion at constant velocity (called terminal velocity). since in this case gravity is not the only force acting on the object, we are not in a situation of free fall.