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Electric forces among two charged objects tend to be much stronger in magnitude than the attractive gravitational force between them. Two particles of masses 7.93 kg and 8.97 kg and charges 2.56 char16.png C and -4.01 char16.png C respectively are separated by a distance 57.1 cm. Discover the magnitude of the ratio of the gravitational to electric forces among them.
A runner of mass m = 37 kg and running at 2.8 m/s runs as shown and jumps on the rim of a playground merry-go-round which has a moment of inertia of 383 kg·m2 and a radius of 2 meters
A resistor with R = 2.4 k? is connected to an AC generator that operates at 60 Hz with an amplitude of 41 V. Find the amplitude of the current through the resistor
What is the center of gravity? How can you find it in various objects? How dooes it effect the equilibrium of an object, What are the types of stability
A certain superconducting magnet in the form of a solenoid of length 0.520 m can generate a magnetic field of 9.10 T in its core when its coils carry a current of 80 A
A 25.9 g mass is moving in the +x-direction at 56.6 cm/s while a 22.3 g mass is moving in the -x-direction at 41.6 cm/s. Find their velocity (in cm/s) after the collision
suppose a duck lives in a universe in which h 2 pij middot s. the duck has a mass of 1.55 kg and is initially known to
A bullet of mass m = 28 g is fired into a wooden block of mass M = 4.1 kg as shown in the figure below. The block is attached to a string of length 1.5 m. what was the initial speed of the bullet
A cubical box is .75m on a side. What are the dimensions of the box with an observer moving with a speed of .88c parallel to one of the edges of the box? What is the volume of the box?
Ball 1, with mass of 100g and traveling at 10 m/s, collides head-onwith ball 2, which has a mass of 300g and is initially at rest. What is the final velocity of each ball
The cubit is an ancient unit. Its length equals six palms. (A palm varies from 2.50 to 3.50 inches depending on the individual.) We are told Noah's ark was 300 cubits long, 50 cubits wide and 30 cubits high.
What would be the final temperature of 100g of 16°C water when 107 g of 40°C iron nails are submerged in it? (The specific heat of iron is 0.12 cal/g °C. Here you must equate the heat gained by the water to the heat lost by the nails.)
q1. a 100 kg truck moving at 10 ms runs into a concrete wall. it takes 1.0 sec for the truck to completely stop. what
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