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A hobbyist launches a projectile from ground level on a horizontal plain. It reaches a maximum height of 72.3 m and lands 111 m from the launch point, with no appreciable air resistance. What was the angle of launch if g = 9.80 m/s2?
A motorcycle, which has an initial linear speed of 9.7 m/s, decelerates to a speed of 2.6 m/s in 3.6 s. Each wheel has a radius of 0.69 m and is rotating in a counterclockwise (positive) directions. What is (a) the constant angular acceleration (in r..
You were stranded on a desert island with John, who wears glasses. He manages to start a fire. Is John nearsighted or farsighted? Explain how you know. Explain what nearsighted and farsighted mean, and how glasses correct the condition.
The electric field everywhere on the surface of a thinspherical shell of radius 0.720 m is measured to be equal to 890 N/C andpoints radially toward the center of the sphere
q1. monochromatic light from a distant source is incident on a slit 0.750 rm mm wide. on a screen 2.00 rm m away the
A 980 kg car is pulling a 315 kg trailer. Together the car and trailer move forward with an acceleration of 2.25 m/s2. Determine the net force on the trailer
A certain satellite travels in an approximately circular orbit of radius 2.2 × 106m with a period of 8 h 15 min. Calculate the mass of its planet from this information
An 11.2 kg box is pulled at a constant velocity across a rough level floor by a 317 N force F directed 23.5o above the horizontal, through a displacement x of 5.65 m. How much net work is done on the box
The springs of a 1300kg car compress 6.00 mm when its 68 kg driver gets into the driver's seat. If the car goes over a bump, what would be the frequency of vibrations.
Watch the video titled "Video Tour of the Electromagnetic Spectrum" (5 min 3 sec) under the EM Spectrum terms section of the Science Corner. You can also view the video at http://missionscience.nasa.gov /ems/emsVideo_01intro.html. Next, describe ..
A hunter fires a rifle and shoots a 4.20-g bullet at 965 m/s. The mass of the hunter (including rifle) is 72.5kg. Ignore friction and compute: The recoil velocity of the hunter and the rifle if the rifle is fired horizontally.
A 145 kg object is taken to a height of 270 km above the Earth's surface. What is the object's weight at this height
a cross-sectional area of wire so as to produce a steady current of 5.00 mA, How many electrons passed this cross-sectional area in that amount of time
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