Civil and Environmental Engineering Answers

Three point charges as shown in the accompanying figure are fixed in place in a right triangle. Determine the electric force on the -0.60 µC charge due to the other two charges.

Determine the electric field intensity at a point p midway between two point charges of +2.0×10^-7 c and -2.0×10^-7 c if they are 100 cm apart.

Determine the force between a point charge of -100 μc and +50 μc when they are 200 cm apart in a vacuum.

Calculate the force between the two point charges q1 = 2.25 μc and q2 = 1.50 μc if they are 10 cm apart.

When 25 g of ice at -20°c have absorbed 2500 cal of heat, what os the temperature of the resulting water?

How much heat is required to totally melt 6 kg of aluminum which is at 30 °C.

Determine the amount of heat required to changed 200 g of ice at -5°C to steam at 105°C.

A horizontal arm, capable of rotation about a vertical shaft, carries a mass of 2.5 kg, bolted to it by a 1 cm bolt at a distance of 50 cm from the axis of the shaft. The axis of the bolt is vertical. if the ultimate shearing strength of the bolt is 50 MN/ m ², at what speed will the bolt snap?

A horizontal arm, capable of rotation about a vertical shaft, carries a mass of 2.5 kg, bolted to it by a 1 cm bolt at a distance of 50 cm from the axis of the shaft. The axis of the bolt is vertical. if the ultimate shearing strength of the bolt is 50 MN/ m ², at what speed will the bolt snap?

Determine the volume of the solid formed when the region enclosed by the curve y=√x, the x-axis and the linex= 4, is revolved about the line x= 4.