Physics Questions and Answers January 24, 2020

A block of weight w is suspended from a rope tied to two other ropes at point O. One rope is horizontally attached to a wall and the other is fastened to the ceiling. The angle between the ceiling and the rope is 60. What are the tensions in each of the ropes? Assume the weights of the ropes and the knot are negligible. If the weight of the block

60 T. T2 T. 3

12.0cm is filled with steam to a pressure of P 1.0atm. A cylinderpiston system with radius r 3D The height of the piston is h, 8.5cm at T 120C. a) What is the height of the piston when the steam has a temperature of T b) How much energy was added to the system via heat 3D 3D 225C 3D

A heterogeneous cylindrical reactor core contains 10,000 fuel rods. The maximum thermal-neutron flux is 10u and the fuel enrichment is 3 percent. The average moderator temperature is 500 F. The fuel pellets are 0.6 in. in diameter. The core is 8 ft in diameter and 20 ft high. Neglecting the extrapolation lengths, calculate the total heat generated

A laser beam is incident on two slits with a separation of 0.185 mm, and a screen is placed 4.85 m from the slits. An interference pattern appears on the screen. If the angle from the center fringe to the first bright fringe to the side is 0.189, what is the wavelength of the laser light?

A magnetic circuit comprises three parts in series, each of uniform cross-sectional area (c.s.a.). They are: (a) a length of 80 mm and c.s.a. 50 mm2, (b) a length of 60 mm and c.s.a. 90 mm2, (c) an airgap of length 0.5 mm and c.s.a. 150 mm2. A coil of 4000 turns is wound on part (b), and the flux density in the airgap is 0.30 T. Assuming that all

A pith ball is attached to a massless string which is attached to a wall. The wall has negative charges on it and is creating an electric field in the region of the pith ball equal to 1000 NC. If the pith ball has 2 trillion extra electrons on it, and weighs 88 x106 kg, what is the angle 0 going to be pith ball surface

A uniform meter stick of mass M is pivoted on a hinge at one end and held horizontal by a spring with spring constant k attached at the other end (Fig. 1428). If the stick oscillates up and down slightly, what is its frequency Write a torque equation about the hinge. FIGURE 1428 1.25 m

Albert's laboratory is filled with a constant uniform magnetic field pointing straight up. Albert throws some charges into this magnetic field. He throws the charges in different directions, and observes the resulting magnetic forces on them. Given the sign of each charge and the direction of its velocity, determine the direction of the magnetic

Assume that the exclusive-OR gate has a propagation delay of 10ns and that the AND and OR gates have a propagation delay of 5 ns. (a) What is the propagation delay time of the following 1-bit full adder? (b) what is the total propagation delay time of a 4-bit ripple carry adder built using the 1-bit full adder? (c) what is the total propagation

C4 C4 A3 S3 C3 G3 B2 P2 Az G2 Carry Lookahead Generator B P1 P1 G1 Ba Po Po Ao So Go Co Co FIGURE 4.12 Fourbit adder with carry lookahead