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A spherical conductor of radius 8 cm has a uniform surface charge density of 0.1 nC/m^2. Determine the electric field: a) on the surface of the conductor; b) at a distance of 10 cm from the centre of the conductor.
A hockey player makes a slap shot, exerting a
force of 37.2 N on the hockey puck for 0.147 s.
What impulse is given to the puck?
Answer in units of kgm/s.
What is the wavelength in air under standard conditions of a compressional wave
whose frequency is 250 per second? Assume that the bulk modulus for air is 1.40
x 106 dyn/cm2 and the density of air is 1.29 g/L.
The velocity of light in a liquid is 0.80 as fast as it is in air. What is the index of
refraction of the liquid?
A tuning fork vibrates 200 times per second and sends out a compressional wave
that travels with a speed of 340 m/s. Find (a) the period and (b) the wavelength.
A steel rod 4 m long and 0.5 cm2
in cross sectional area is found to stretch 0.2
cm under a tension of 12000 N. Under these conditions, determine
(a) The stress
(b) The strain; and
(c) Young’s modulus for the material
A rigid plank 5.00 m long has mass 30.0 kg and supports a 75.0kg block 2.00 m from the left end. How much force is needed to support each end of the plank?
Find the tension in the horizontal part of the supporting cable, and the compression in the boom, elevated to 25.0°, of the crane that lifts a 8900.N load.
Suppose you have two capacitors 8.0 μF and 4.0 μF connected in series and parallel with points a and b whose potential
difference is 20 V. Find the equivalent capacitance and charge.
Suppose you have two capacitors 8.0 μF and 4.0 μF connected in series and parallel with points a and b whose potential
difference is 20 V. Find the equivalent capacitance and charge.
