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the critical angle at an air liquid interface is 50°. calculate the refractive index of the liquid
The power rating of a water pump is 4200 watts, if it is run for 600s, how many joules of work will it do in that time?
Calculate the electric field due to a charge of 35uc when it experiences an electrostatic force of 2×10^3N when placed in a vacuum.
An oil (specific gravity = 0.75) with a depth of 10 m has a barometric reading of
755 mmHg. Calculate the absolute pressure in kPa
10. A 1500 kg yellow convertible is travelling south, and a 2000 kg red station wagon is travelling west. If the total momentum is of the system consisting of the two cars is 8000 kg.m/s directed at 30° west of south, what is the speed of each car?
The pressure below the depth of 25 m of a homogenous fluid is 50.473 psi.
Calculate specific weight in kN/m3,density of fluid in kgm/m3 and its specific
gravity.
The surface of the Sun has a temperature of about 5800 K. The radius of the Sun is 6.96 x 108 m. Calculate the total energy radiated by the Sun each second. Assume the emissivity of the Sun is 0.965
If you are in motion with an acceleration of 2 m/s2, this means that
a. your speed increases 2 m/s every second
b. your displacement increases by 2 m every second
c. your distance increases by 2 m every second
d. your acceleration increases 2 m/s every second
The intrinsic temperature of a semiconductor is the temperatures at which the intrinsic
carrier concentration equals the impurity concentration. Find the intrinsic temperature for a
silicon sample doped with 1015 phosphorus atoms/cm3
.
Two point charges are located on the positive x-axis of a co-ordinate system. Charge is 2.0cm from the origin, another charge is 4.0cm from the origin. What is the total force exerted by these two charges on a charge located at the origin?
