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Question: Determine joint displacements and axial forces in the truss shown in Figure if instead of load P the diagonal member experiences a temperature decrease of 70°F. The coefficient of thermal expansion is a =6 x 10-6/°F.
A laser beam enters a 10.5 cm thick glass window at an angle of 68.0° from the normal. The index of refraction of the glass is 1.44. At what angle from the normal does the beam travel during the glass?
Find the magnetic field generated 5.0 cm above a single 2.5 cm long segment of copper wire carrying a current of 3.0 A. how much stronger is the actual field from the whole wire at this point
A 1000-turn coil of wire that is 2.0 cm in diameter is in a magnetic field that drops from 0.13 T to 0 T in 12 ms . The axis of the coil is parallel to the field.
Two parallel metal rods form a plane inclined at 20 degrees to the horizontal. The upper end of the rods are connected together by a resistor of 166ohms, What is the maximum speed of the bar
Two vehicles approach a right angle intersection and then collide. After the collision, they become entangled. If their mass ratios were 1:3 and their respective speeds as they approached were both 13 m/s, find the magnitude and direction of the fina..
Two small charges with a mass of 1.0 g each are connected by 2.0-cm-long insulating rod of negligible mass. Obtain the moment of inertia around the center of mass
Use the data of Table 7.3 to find the point between Mars and the Sun at which an object can be placedso that the net gravitational force exerted by Mars and Sun on this object is zero.
Two resistors, 38.0 and 40.0 , are connected in parallel. The current during the second resistor is 3.20 A. What is the current in the first resistor? What is the total power supplied to the two resistors?
Determine the image distance for an object d0 = 5.100 cm from a diverging lens of radius of curvature 4.080 cm and index of refraction 1.800. What is the magnification of the object
A guitar string of length L =1 is pulled upward at the middle so that it reaches height h. What is the subsequent motion of the string if it is suddenly released
Calculate the rotational inertia of a wheel that has a kinetic energy of 24,400 J when rotating at 641 rev/min
If 100 Joules is transferred to the Sample A, its temperature goes up by 10 degrees Celcius. How many calories does each gram of Sample A receive? What is the specific heat of the material? If 100 Joules were transferred to Sample B what is the chang..
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