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Harold the Hurler is a physics student who is renowned for his baseball pitching arm. In order to determine the amount of work he performs in throwing a baseball, Harold devises an experiment. He stands at the bottom of a deep pit and hurls a 144-g baseball through an open third-floor window in a nearby building. Harold\'s aim is so accurate that the ball then smoothly enters the tube of the Baseball Absorber that Harold invented and patented. In this device the ball compresses a spring until it comes momentarily to rest, and this maximum amount of compression is recorded as 43.9 cm. The spring\'s force constant is 865 N/m, and the position of the baseball\'s momentary rest is 7.39 m above ground level. The point in the pit where the Hurler starts his pitch is 10.3 m below ground level. How much work does Harold perform on the baseball? Take g = 9.80 m/s2.
The pressure inside a gas bottle at 25.5 °C is 3630 kPa. What will be the pressure inside the bottle
When a 4.0 µF capacitor is connected to a generator whose rms output is 32 V, What is the frequency of the source
A 68.0-kg person throws a 0.0500-kg snowball forward with a ground speed of 27.0 m/s. What are the velocities of the two people after the snowball is exchanged
A generator rotates at 95Hz in a magnetic field of 0.025T . It has 650 turns and produces an rms voltage of 180V, What is the area of each turn of the coil
What is the magnitude of the auto average acceleration.
Charges q and Q are placed on the x axis at x = 0 and x = 2.0 m, respectively. If q = -40 pC and Q = +30 pC, define the net flux through a spherical surface (radius = 1.0 m) centered on the origin.
A 58 ice cube can slide without friction up and down a 28 slope. The ice cube is pressed against a spring at the bottom of the slope, When the ice cube is released
A Cassegrain astronomical telescope uses two mirrors to form the image. Compute the radius of curvature of a secondary mirror
If a 4 cm piece of insulation is added to the pine ceiling kpine = 0.120 J/msC kinsul = 0.042 J/msC If a 4 cm piece of insulation is added to the pine ceiling , find the interface temperature for the pine and insulation.
The spring stretches 5.0 cm from its previous equilibrium position toward the two spheres. Calculate the spring constant.
110 grams of boiling water (temperature 100° C, heat capacity 4.20 J/gram/K) are poured into an aluminum pan whose mass is 1000 grams and initial temperature 24° C (the heat capacity of aluminum is 0.9 J/gram/K).
What is the rate of heat flow into a system whose internal energy is increasing at the rate of 45 W, given that the system is doing work at the rate of 165 W
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