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The tension in a string holding a solid block below the surface of a liquid (of density
greater than the block) is T0 when the container is at rest. When the container is given an upward acceleration of 0.250g, what multiple of T0 gives the tension in the string?
FIGURE 6 shows a 3.0 kg box sliding down with constant speed u = 1.2 ms-1 along a rough plank inclined at an angle 25o with the horizontal. Calculate the rate of work done by the frictional force on the block. (Given g = 9.81 ms-2)
A 10kg projectile is fired vertically upward from the ground. with an initial velocity of 50m/s. Determine the maximum height to which it will travel if atmospheric resistance is neglected.
- Will a 0.30 m × 0.30 m × 0.30 m empty copper (ρCu = 8890 kg/m3) box float in water? The total mass of copper is 3.2 kg.
How does an electric field and magnetic field affect the kinetic energy of a charged particle moving in free space?
A rigid tanks contains a perfect gas with R = 2.08 KJ/kg-K and k = 1.67. Calculate the final temperature in C if it initially at 30C and 15KJ/kg of heat is added
A tank contains 80 of air at a pressure of 350 psi; If the air is cooled until its pressure and temperature decreases to 200 psi and 80F respectively, what is the decrease in internal energy in Btu.
A rectangular surface of length 3.25 cm and width 5.25 cm lies on the x-z plane at y=0. What is the flux through this surface due to a uniform magnetic field of 0.65 T directed 60° from the +x-axis?
A closely wound 0.20m × .20 m square coil of 100 turns is exposed to an external magnetic field of 0.74 T that is perpendicular to the plane of the coil. The coil is then rotated for 10 s until it makes 60 degrees with the magnetic field. Find the average induced electromotive force during the 10 s interval.
2. A TV set, a stove, a flat iron are connected in series to a 220 V line. The resistance of the TV set is 20 ohms, the stove is 50 ohms and the flat iron is 35 ohms. Find the following;
(a) total resistance
(b) the amount of current flowing in each device
(c) the voltage drop across each device
#339914 on Dec 2023