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When the first artificial satellite was launched into orbit by the former Soviet Union in 1957, U.S. president Dwight D. Eisenhower asked his scientific advisors to calculate the mass of the satellite. Would they have been able to make this calculation? Explain.
Two small non conducting spheres have a total positive charge of 108.4 μC. Obtain what is the charge on the spheres
A parallel plate capacitor with vacuum between the circular plates has a capacitance of 323 nF. Each plate has a diameter of 20 cm. 100 V is applied between the plates, how much charge is there on each plate
Calculate the mechanical advantage of a group of pulleys used to raise an engine from a car. The engine is raised 1.2 m with the pulleys when 4.8 m of rope is pulled through the pulleys.
two large parallel conducting plates are 21 cm apart and have charges of equal magnitude and opposite sign on their
A helicopter has blades of length 6 m, rotating at 4.1 rev/s about a central hub. If the vertical component of Earth's magnetic field is 4.5×10?5 T, FIND the maximum emf induced in the coil by Earth's magnetic field
How large in N is the electrostatic repulsion between two protons a distance d = 5.2 fm apart in a nucleus
A blue ball is thrown upward with an initial speed of 24.1 m/s, from a height of 0.8 meters above the ground. 2.9 seconds after the blue ball is thrown, How long after the blue ball is thrown are the two balls
an isolated conductor of arbitrary shape has a net charge of 9.0 x 10-6 c. inside the conductor is a cavity within
A uniform beam of weight W and length L is supported by two wires made of the same material, but of different diameters. What will be the ratio of the two frequencies
An astronaut leaves Earth in a spaceship at a speed of 0.280C relative to Earth. Find the distance to the star system as measured by the astronaut
A wire of length 0.72 m and cross-sectional area 2.7 cm2 is stretched elastically by an amount 1 cm. Calculate the work done in stretching the wire
Two rocket ships travel in the same direction with a relative speed of .98c. a light pulse is fired from the back of one of the ships to the front of the same ship of length deltaX=20m.
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