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A uniform rod of length L and weight W is placed on a fulcrum a distance of 0.4L from the left end. On the left end is placed a mass of weight 2Wand on the right end a vertical force F is applied to keep the system in balance. What are the magnitude and direction of the force F?
Select one
a. 7/6 W, up
b. 4/3 W, up
c. 4/3 W, down
d. 7/6 W, down
A chairlift has a length of 2 km, a vertical rise of 100 m, and it is operating at a constant speed of 8 km/h. The chairs are located 20 m apart, and each chair can seat four people (250 kg total mass). Determine the power required to operate this..
The collar A slides on the vertical bar. At the instant shown, its coordinates are x=0.9 m, y=0.6m, and its velocity and acceleration are \(v=4j m/s\) and \(a=-9.81j m/s^2\) . Determine the velocity and acceleration of collar A in polar coordinates.
A cord of length 1.3 m is fixed at both ends. Its mass per unit length is 1.1 g/m and the tension is 12 N. What is the frequency of the fundamental oscillation
The ammonia molecule NH3 has a permanent electric dipolemoment equal to 1.31 D, where 1 D = 1debye unit = 3.34 multiplied by10-30 C·m. Calculate the electric potential dueto an ammonia molecule at a point 51.0 nmaway along the axis of the dipole. (S..
When a problem ask how to identific proper significant figures what does it mean. My problem says What is the result of (3.83 m x 1.23 m ) /0.79 m with the proper number of significant figures?
Suppose 2.50 kg of 32 degrees C water is mixed with 9.30 kg of 65 degrees C water. If no heat is lost in this system, what is the final temperature of the water
A solenoid with a radius R=5cm is made of a long piece of wire with a radius of 2mm, length L= 10m, and resistivity= 1.7 x 10-8. Find the magnetic field at the center of solenoid
The frequency and wavelength of a transverse wave on a string are 340 Hz and 0.70 m, respectively. What is the linear density of the string
Two insulated wires, each 2.50 m long, are taped together to form a two-wire unit that is 2.50 m long. One wire carries a current of 7A; the other carries a smaller current I in the opposite direction. The two wire unit is placed at an angle of 78..
A ray of light is incident normally on a glass plate 6.00 cm thick and of refractive index n = 1.29, find the increase in the distance the ray travels in the glass
A patient recovering from surgery has been given fluid intravenously. Find what is the mass flow rate
a closed surface encloses a net charge of 3.40uc . what is the net electric flux through the surface? if the electric
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