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A 1 200-N uniform boom at f 5 65° to the horizon- tal is supported by a cable at an angle u 5 25.0° to the horizontal as shown in Figure P8.28. The boom is pivoted at the bottom, and an object of weight w 5 2 000 N hangs from its top. Find
(a) the tension in the support cable and
(b) the components of the reac- tion force exerted by the pivot on the boom.
Calculate the electrical potential at the center of the square described as follows: Four charges are placed at the corners of a 20 cm square
a merry-go-round r=2m, initially at rest is given a constant tangential push that depends on time. F(t) =β(t) applied on the rim. β=10N/s, Calculate angular acceleration as a function of time
What is the third fragment right after the explosion
A 56.7-µF capacitor is connected to a generator operating at a low frequency. The rms voltage of the generator is 3.88 V and is constant. at what frequency will the fuse burn out
Two generators use the same magnetic field and operate at the same frequency. Find the coil radius r of this other generator
Two 1.6 kg bodies, A and B, collide. The velocities before the collision are vector vA = (18i hat + 35j hat) m/s and vector vB = (-10i hat + 10.0j hat) m/s.
A series RLC circuit consists of a 42.0 ? resistor, a 2.70 mH inductor, and a 460 nF capacitor. Determine the impedance at frequency 3000 Hz
A container of hot water at 80 degrees cools to 79 degrees in 15 seconds while it is placed in a room that is t 20 degrees. Use newton's law of cooling to estimate the time it will take for the container to cool from 50 degrees to 49 degrees.
The balloon contains 0.30mol of helium starts at a pressure of 110 kPa and rises to an altitude where the pressure is 70.0 kPa, How much work does the gas in the balloon do
A freezer is used to freeze 2.0 L of water completely into ice. The water and the freezer remain at a constant temperature of T = 0°C. Determine the change in the entropy of the freezer
Two trains on separate tracks move toward each other. Train 1 has a speed of 125 km/h; train 2 a speed of 84.0 km/h. What is the frequency heard by the engineer on train 1
a cube of wood floating in water supports a 200g mass at the centre of its top face. when the mass is removed, the cube rises by 2cm. determine the volume of the cube
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