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A sled after a final push moves at velocity of 5.0i m/s. However, after 8.0 s later the sled comes to rest. If the mass of the sled is 40 kg, determine the magnitude of the average friction force acting on the sled during this interval?
In a PET scan, an electron and positron annihilate each other, creating two (massless) photons. What is the kinetic energy of each photon in this case
A 62kg hiker starts at an elevation of 1500m and climbs to the top of a 3500m peak, What is the minimum work required of the hiker
A 2500 kg car rounds a flat curve of radius 75 m at speed of 80 km/h. if the pavement is icy and the force of static friction is 6000 n, what is the maximum speed the car could safely go around the curve
Suppose that a particle of mass 0.24 kg acted upon by a spring undergoes simple harmonic motion with a period of 1.2 s, What is the total energy of this motion
For a rocket propulsion velocity of exhaust gases relative to rocket is 2km/s.If mass of rocket system is 1000kg, then what is the rate of fuel consumption for a rocket to rise up with acceleration 4.9m/s^2?
In a Certain Organic molecule, the nuclei of two carbon atoms are separated by a distance of 0.25 nm. What is the magnitude of the electric force between them
Light shines through a single slit whose width is 5.8 x 10-4 m. A diffraction pattern is formed on a flat screen located 4.0 m away. The distance between the middle of the central bright fringe and the first dark fringe is 4.3 mm. What is the wavelen..
radio waves travel at the speed of light which is 3x108 ms. how many minutes does it take for a radio message to reach
A molecule of DNA (deoxyribonucleic acid) is 2.23 µm long. The ends of the molecule become singly ionized: negative on one end, positive on the other. The helical molecule acts like a spring and compresses 1.19% upon becoming charged, and remains in ..
The magnitude of the field produced by a point charge of +5.4 micro-coulombs has a magnitude of 5.9 x 106 N/C, How far is the point from the charge
A cat is located 4.7 m in front of a concave mirror. The mirror has a radius of 1.6 m. Construct a ray diagram to scale following the steps outlined in the procedure here. Where is the image of the cat
Consider the Earth and a cloud layer 900 m above the planet to be the plates of a parallel-plate capacitor. (a) If the cloud layer has an area of 1.0 km2 = 1000000 m2, what is the capacitance?
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