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Define the elastic modulus. Explain the different types of elastic modulus.
1+2
b) State and explain Einstein's Photoelectric Effect theory.
1+2
c) If 12𝑁 force is applied to a fluid of cross-section 5.34 𝑐𝑚2 with a shearing rate of
0.7 𝑠−1
then find the viscosity of the fluid.
Consider an automobile moving at v mph that skids d feet after its brakes lock. Calculate how far it would skid if it was moving at 2v and the brakes were locked.
The driver of a 2.0 × 103 kg red car traveling on the highway at 45m/s slams on his brakes to avoid striking a second yellow car in front of him, which had come to rest because of blocking ahead as shown in above Fig. After the brakes are applied, a constant friction force of 7.5 × 103 N acts on the car. Ignore air resistance.
(a) Determine the least distance should the brakes be applied to avoid a collision with the other vehicle?
(b) If the distance between the vehicles is initially only 40.0 m, at what speed would the collision occur?
(c) Write your conclusive observations on the result obtained from this numerical. i.e. the importance of Physics in daily life.
A sinusoidal wave is described by 𝑦 = (0.48 𝑚) sin(0.555𝑥 − 36.0𝑡) 𝑚, where x and y are in meters
and t is in seconds. Determine for this wave the (a) amplitude, (b) angular frequency, (c) angular wave
number, (d) wavelength, (e) wave speed, and (f) direction of motion.
A metal rod pivots from one of its ends oscillating at 2.0 Hz. A. What is the length of the rod?
B. Would the frequency change if the mass of the rod is varied?
A matter has a body-centered cubic unit cell with a length of 330 𝑝𝑚 along an edge and a density of 8.57 𝑔 𝑐𝑚−3 . Calculate the atomic mass of the matter.
four identical cells each of EMF 1.5v and internal resistance of 0.5 ohms are connected in series across an external load of resistance 1.5 ohms. calculate the current that passes through the load
Solid metal cube of side 10cm is heated from 10°c. if the linear expansivity of the metal is 1.2×10-5k-1, calculate the increase in it volume
Form an AM DSBFC envelope with a 40V positive maximum voltage and a 10V positive minimum voltage, determine (a) the unmodulated carrier amplitude, (b) the peak change in amplitude of the modulated wave, and (c) coefficient of modulation and percent modulation.
An Am broadcast station in Oman is allowed to transmit modulating frequencies up to 5 KHz. Calculate the maximum and minimum upper and lower sidebands and the total bandwidth occupied by the AM station if its transmitting frequency is 740 KHz.
