Apoint charge q1 = -4.00 nc is at the point x = 0.60 m, y = 0.80 m , and a second point charge q2 = +6.00 nc is at the point x = 0.60 m , y = 0. calculate the magnitude of the net electric field at the origin due to these two point charges? calculate the direction of the net electric field at the origin due to these two point charges?

Atrain departs from its station at a constant acceleration of 5 m/s. what is the speed of the train at the end of 20s?

A5 foot by 5 foot box culvert is buried 6 feet beneath the surface of the ground. a crosssection of this very long culvert (into and out of the page) is illustrated below. assume that the soil in which the culvert is buried has the following properties: jt = 120 pcf, w = 12%, ko = 0.50, ka = 0.33, and kp = 3.00. calculate the total horizontal force per unit length of culvert (fh) felt on one of the vertical faces of the culvert.

Asmall electric heater, immersed in 80g of water in a calorimeter of 40j/k raises the temperature from 10.5 degree celsius to 25 degree celsius in 12 minutes. using the same apparatus with 50g of oil instead of water, it is found that the temperature of oil rises from 7 degree celsius to 27 degree celsius in 10 minutes. find specific heat capacity of the oil.