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If someone wanted to build a scale model of the atom with a nucleus 90.0 cm in diameter, how far away would the nearest electron need to be?
A lens system consists of two lenses 48.5 cm apart. The first lens is convex (converging) and has a focal length of 25.22 cm. What is the focal length of the second lens
A skateboarder shoots off a ramp with a velocity of 6.1 m/s, directed at an angle of 58degrees; above the horizontal. The end of the ramp is 1.1 m above the ground. Let the x axis be parallel to the ground, the +y direction be vertically upward, and ..
a thin spherical shel has a radius of 1.9 m an applied torque of 960 Nm gives the shell an angular acceleration of 6.2 rad/s2, what is the rotational inertia of the shell about that axis and what the mass of the shell
A freight car with a mass of 10 metric tons is rolling at 108 km/h along a level track when it collides with another freight car, what is the mass of the second car
A swimmer dived off a cliff with a running horizontal leap. What must his minimum speed be just as he leaves the top of the cliff
A skateboarder, with an initial speed of 4.2m/s, rolls virtually friction free down a straight incline of length 15m in 3.3 s. At what angle is the incline oriented above the horizontal
A massless spring hangs from the ceiling with a small object attached to its lower end. What is the frequency of the oscillation
A high-voltage power line carries a current of 110 A at a locationwhere the Earth's magnetic field has a magnitude of 0.59 G andpoints to the north, 72 degrees below the horixontal.
A woman inside an elevator is standing on a scale. Before the elevation it starts moving the scale shows 50 kg, calculate the acceleration of the elevator if when it starts moving upward the scale reads 70kg. What will the reading of the scale be ..
Two concentric metal spheres are found to have a potential difference of 846.0 V when a charge of 3.186·10-8 C is applied to them. What is the radius of the inner sphere
he boat continues for an additional 5.90 s with an acceleration of +0.518 m/s2. Following this, the boat accelerates at -1.49 m/s2 for 8.05 s. What is the velocity of the boat at t = 21.35 s? Find out the total displacement of the boat?
It takes the elevator in a skyscraper 4.1s to reach its cruising speed of 13m/s. A 68kg passenger gets aboard on the ground floor. find the passenger's weight before the elevator starts moving
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