Physics
Question Charges Q1 > 0 and Q2 < 0 have velocities in the plane of the page. A uniform magnetic field with magnitude B is going into the plane of the page, and a uniform ele...
Question Three forces 77, T2 are holding an object of weight W as shown in the diagram. If <9 = 45°, (p = 30° and the object of mass 2500 g. Find all three forces actin...
Question Three forces 77, T2 are holding an object of weight W as shown in the diagram. If Summary The question belongs to Physics and it is about calculating the forces actin...
Question What is the density of air at 100 km if the atmosphere has a scale-height of 8 km? Summary This question belongs to geophysics and discusses about the density of air at...
Question A spring of constant k = 100 N/m hangs at its natural length from a fixed stand. A mass of 3 kg is hung on the end of the spring, and slowly let down until the spring and...
Question A 5-turn circular loop of wire of radius 23 cm carries a current of 15 A. Its magnetic moment is oriented at an angle 50â—¦ to a uniform magnetic field of 3.7 T. What ene...
Question A spring of constant k = 100 N/m hangs at its natural length from a fixed stand. A mass of 3 kg is hung on the end of the spring, and slowly let down until the spring and...
Question A pendulum of mass 0.4kg and length 0.6 m is pulled back and released from and angle of 10Ëš to the vertical. What is the potential energy of the mass at the instant it i...
Question A fuel cell converts the chemical energy in fuel and oxidant to electric energy (as shown in the figure to the right). The reversible potential for the hydrogen electrode...
Question The fuel cell is operating with a current density, j of 0.3A/cm3, and a cell voltage, Vcell of 0.6 volt, as it uses hydrogen as the fuel and oxygen as the oxidant. ...
Question A steel cylindrical hollow tube, with outside diameter of 16cm and a thickness of 20mm is used as a beam over a span of 6m, being simply supported at its ends. The maximu...
Question What is the resistance of an annealed copper wire that has a length of 500m and a diameter of 0.5 mm? How a diameter two times smaller affects the resistance.Summary The...