Physics Answers

In a geology class, you were asked to determine minuscule pieces of rocks are magnetic or not. The problem is you don't have available magnets in the laboratory but a few copper wires and a power supply. How will you identify the magnetic property of rocks?

Two point charges are placed as follows: charge q_{1} = - 1.50nC is at y = 6.00 m and charge q_{2} = 3.20nC is at the origin. What is the total force (magnitude and direction) exerted by these two charges on a negative point charge q_{3} = - 5.00nC located at (2.00 m, -4.00 m)?

Water flows through a venturi meter which contracts from D = 300 mm to

d = 150 mm at the rate of 0.0037 m3

/s and the differential gauge has a

deflection, h of 1 m, as shown in the figure below. Specific gravity of the

gauge liquid is 1.25. Determine the coefficient of discharge of the meter.

Two capacitors with 2.0 F and 3.0 F capacitance, respectively, are connected in series and subjected to a total potential difference of 100 V. Find the (a) total capacitance,

(b) charge stored in each capacitor, and (c) potential difference across each capacitor

A capacitor consists of two square metal plates, each measuring 5.00×10^2m on a side. In between the plates is a sheet of mica measuring 1.00×10^4m thick.

(a) What is the capacitance of this capacitor? If the charge in one plate is 2.00×10^8C.

(b) What is the potential difference?

(c) What is the electric field between the plates?

Give: Permittivity of Mica (E= 4.8×10^-11C²/N.m²)

A point charge of -6.00×10^9C is 3.00m from point A and 5.00m from point B. (a) Find the potential at point A and point B.

(b) How much work is done by the electric field in moving a 2.00 nC particle from point A to point B?

2. Determine the magnitude of electric field value if a distance of 35 cm from a 0.00050 C

charge.

an appliance cord is consist of two wires, about 2m long with individual wire which is about 3mm apart and carry a current of 8A DC. calculate the force exerted by the wires.

protons in a uniform magnetic field 0f .3 T follow a circular trajectory with 20 com radius. determine the speed of protons. ( q = 1.6 x 10^-19 and m = 1.673 x 10^-27 K )

A man of mass 50kg ascends a flight of stairs 5m high in 5 seconds.If acceleration due to gravity is 10m/second-2.The power expended is???