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A 20 kg crate hangs at the end of a long rope. Find its acceleration when the tension in the rope is (a) 250 N (b) 150 N (c) zero (d) 196 N
A long copper wire with a radius of 2.0 mm carries a uniform linear charge density of λ = 6.2x10-8 C/m. Find the magnitude of the electric field at a distance of 10 cm from the wire.
a)
The temperature of 200 g of water increases from 20°C to 50°C in 10 minutes. Calculate:
i.
the amount of heat gained by the water.
ii.
the average rate at which the water is gaining heat.
(Specific heat capacity of water = 4200 J kg-1 OC-1)
b) Determine the amount of heat that must be removed from 1 kg of water at 40°C to convert it to ice at -5°C.
At the center of a sphere of radius 0.5m a point charge of 2μC is placed. What electric flux is passing through the sphere?
Calculate the final centigrade temperature to change 20litres of gas at 120°c and 1atmosphere to 25litres at atmosphere.
A point charge pf -6 x 10^-9 C is 5 m from point A and 3 m from point B.
Find the Potential at point A and point B. What is the potential difference between
point A to B?
Answer this question please with solution Thank you.
Two point charges, q1 = 8 µC and q2 = -5 µC, are separated by a distance r = 0.1 m. What is the magnitude of the electric force? Note: 1 µC = 10-6 C.
Calculate the electric flux through a rectangular surface of dimensions 20cm × 10cm, placed with its positive normal making an angle of 30° with a uniform electric field of 30 × 10^-3 N/C.
The radius of the outer sphere of a spherical capacitor is five times the radius of its
inner shell. What are the dimensions of this capacitor if its capacitance is 5.00 pF?
A positive charge, q=+20 nC, is on the y-axis at y +4.00 cm. (a) Determine the magnitude and direction of the electric field at the origin (b) What will be the magnitude and direction of the electric field at the origin of the charge is -20 nC?
