You have an RC timing circuit made from three capacitors, each C and in parallel with each other, and one resistor R. You wantto change the RC time constant to one-third what it was byremoving one of the capacitors and adding one resistor of theappropriate value. What does the new total resistance of theciruit need to be and how should you add the new resistor (seriesor parallel)

New total resistance = R/2

The new resistor is connected in parallel.

Explanation:

Let be initial time constant and the new time constant.

The 3 capacitors are connected in parallel. The total capacitance, , is their sum. Hence

The new time constant is one-third of the initial time constant.

If one of the capacitors is removed, then the new total capacitance, is

If the new total resistance isc, then

Since this is less than the old total resistance, the new resistor, with resistance, X, must be connected in parallel. Its value will be R, as below:

5 w for 1hr = 5x60x60 joules=300x60=3000x6=18,000j as total energy conversion. efficiency of bulb needed for radiant to thermal within 18000

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.