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A gunner wants to fire at a target at a horizontal distance of 12500 m from his position.
(a) If his gun fires with a muzzle speed of 700 m/s and if g = 9.81 m/s^2, what is the correct elevation angle? Pretend that there is no air resistance.
(b) If the gunner mistakenly assumes g = 9.80 m/s^2, by how many meters will he miss the target?
Illustrate what is the maximum load that can be hung from a copper wire of diameter 0.46 mm? Answer in units of N.
A virtual object is located to the right of a diverging lens whose focal length is -f cm. Find the distance of the image of the virtual object measured with respect to the the lens
You and a friend are studying late at night. There are three 150 W light bulbs and a radio with an internal resistance of 79.0, How much electrical power are you using
A 7 L rigid (constant volume) container holds 0.81 moles of helium at an initial temperature of 75 oC. How many moles of gas will be in the container at the final temperature
A 20-cm-radius ball is uniformly charged to 88nC, What is the ball's uniform charge density (C/m3) and What is the electric field strength at points 5, 10, and 20 cm from the center
A sound wave with intensity 20 mW/m2 interferes destructively with a sound wave that has an intensity of 4 mW/m2. What is the intensity of the superposition of the two
A 1.5 kg object initially at rest is raised to a height of 10 m by a force of 40 N. What is the velocity of the object at this height What time is needed for this motion
a 20 kg mass sits on an inclined plane with friction making an angle of 50 degrees with respect to the horizontal. calculate the frictional force required to keep the mass from sliding down the incline
Many communications satellites orbit the earth in geostationary orbits. (They appear to remain in the same positions in the sky for observers on the earth's surface.) If such a satellite orbits at a height of 40,000 km, estimation the time delay in a..
A steel guitar string 40 cm long has a mass density of 1.5 g/m and the tension is 500 N. Find the frequency of the second harmonic
Bronco Brown is mowing his lawn. He applies a force F along the handle of the lawnmower as shown. Bronco moves the mower at constant velocity.
Calculate the work done on 0.205 mol of methane when it is compressed from 10.0 L to 2.25 L at 25 degree's Celsius, assuming that methane is (a) an ideal gas and (b) a van der Waals gas.
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