Civil and Environmental Engineering Answers

a water tank in the shape of a right circular cone has an altitude of 15 feet and a base radius of 10 feet. If the tank is full of water, find the work done in pumping all the water over the top of the tank.

A spring has a natural length of 8 inches. If a force of 20 lb. stretches the spring 0.5 inches, find the work done in stretching from 8 inches to 11 inches.

Calculate the resistance of copper wire with a diameter of 2.5968 mm having a length of 1000 m at 20°C.

An aluminum wire of diameter D and length L has a resistance of 1.5 Ω. Find the length of another aluminum wire at the same temperature if its diameter is 2D and its resistance is 6 Ω.

A wire 50 cm long and 1 mm in radius is connected to a battery 9.11 V with a current of 36 A. Taking the temperature at 20°C and using the table of resistivities for some materials above, determine the material of the wire.

Calculate the energy stored for the series-parallel combination shown in figure 3 if C1 = 2 µF, C2 = 3 µF, C3 = 4 µF, C4 = 6 µF, and C5 = 8 µF and the charge to a potential difference of 2600 V.

Three capacitors 2 μF, 6 μF, and 24 μF are connected in parallel to battery of 240 V. Calculate the capacitance of the combination and the charge on each capacitor.

Two point charges, +0.4 μc and +6.16 μc, are 20 cm apart in air. Calculate the potential energy and the work required to bring them to a distance of 10 cm from each other.

Calculate the work required to bring a charge of 5.0 static from a point 24 cm from a charge of 60 static to a point 3 cm from it.

Two similar charges of 250 static are situated on small spheres 15 cm apart. What is the electric field intensity midway between the spheres? What is the potential at this point?