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An aluminum rod is 20.0 cm long at 20°C and has a mass of 350 g. If 12,500 J of energy is added to the rod by heat, what is the change in length of the rod
A hammer taps on the end of a 4.00-m-long metal bar at room temperature. What is the speed of sound in this metal
A horse races once around a circular track in a time of 18.0 s, with a speed of 18.0 m/s. Illustrate what is the radius of the track? Give your answer in meters, but do not include units.
A 0.145- kg baseball traveling 36.10 m/s is stopped in 0.143 s by a catcher's mitt. What is the average acceleration of the ball
A 1450 N uniform boom is supported by a cable as shown. The boom is pivoted at the bottom, and a 1270 N object hangs from its end. Find the tension in the cable holding up the boom
A 20 times telescope has a 12{rm cm}diameter objective lens. What minimum diameter must the eyepiece lens have to collect all light rays from an on-axis distant source.
A storage tank contains 21.6 kg of nitrogen (N_2) at an absolute pressure of 3.54 atm. What will the pressure be if the nitrogen is replaced by an equal mass of CO_2 ?
What is the mass of the liquid in the vat.
Evaluate (a) the acceleration of each object, (b) the tension in the string, and (c) the coefficient of kinetic friction between m2 and the incline.
1.two paths lead to the top of a big hill. one is steep and direct while the other is twice as long but less steep.
Calculate the speed of the second ship with respect to Earth if it is fired in the same direction the first spaceship is already moving
If the partial pressure of water vapor is 47 mm Hg in the lungs at 760 mm Hg pressure, what percentage of air does the water vapor constitute?
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