Question The current through a resistor in an a.c circuit is given as 2sinωt. Determine the d.c equivalent of the current. Solution The equation given… Read More »The current through a resistor in an a.c circuit is given as 2sinωt
Question Calculate the peak voltage of a mains supply of r.m.s value 220V. Solution Root mean square of the voltage is Vrms = 220V Peak… Read More »Calculate the peak voltage of a mains supply of r.m.s value 220V
Question The current, I in an a.c circuit is given by the equation I = 30sin100πt, where t is the time in seconds. Deduce the… Read More »The current I in an a.c circuit is given by the equation I = 30sin100πt
Question A robotic vehicle, or rover, is exploring the surface of Mars. The landing craft is the origin of the coordinates, and the surrounding Martian… Read More »A robotic vehicle or rover is exploring the surface of Mars
Question Use Eqs. (2.17) where vx = vox + axt and (2.18) where x = xo + ∫vxdt to find vx, and x as functions… Read More »Use Eqs. (2.17) and (2.18) to find v_x, and x as functions of time in the case in which the acceleration is constant
Question Sally is driving along a straight highway in her classic 1965 Mustang. At time t = 0, Sally is moving at 10 m/s in… Read More »Sally is driving along a straight highway in her classic 1965 Mustang. At time
Calculating the Scalar Product Using Components We can calculate the scalar product Ä • B directly if we know the x-, y-, and 2-components of… Read More »Calculating the Scalar Product Using Components
Question Find the scalar product Ä – B of the two vectors in Fig. 1.27. The magnitudes of the vectors are A = 4.00 and… Read More »Find the scalar product Ä – B of the two vectors in Fig. 1.27.
Question How does an electron maintain its orbit around the nucleus despite having less potential and more kinetic energy in its bound state? Solution Let… Read More »How does an electron maintain its orbit around
Question You are writing an adventure novel in which the hero escapes across the border with a billion dollars’ worth of gold in his suit-case.… Read More »You are writing an adventure novel in which the hero escapes across the border with a billion dollars’
Question find the acceleration of the stack of books if the stack has a total mass of 1.5 kg Solution Data: The information we need… Read More »Find the acceleration of the stack of books if the stack has a total mass of 1.5 kg
Question A car accelerates from rest at a constant rate alpha (α) for some time after which it decelerates at a constant rate β to… Read More »a car accelerates from rest at a constant rate alpha
Question A bus accelerates from the rest for time t1 at a constant rate α then retards at a constant rate β for time t2… Read More »a bus accelerates from rest for time t1
Question A student stands on a bathroom scale in an elevator at rest on the 64th floor of a building. The scale reads 836 N.… Read More »a student stands on a bathroom scale in an elevator at rest on the 64th floor of a building the scal
Question A student stands at the edge of a cliff and throws a stone horizontally over the edge with a speed of 18.0 m/s. The… Read More »A student stands at the edge of a cliff and throws a stone horizontally