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A.) Two charges attract each other with a force of 1.0 N. What will be the force if the distance between them is reduced to one-ninth of its original value?
B.) Suppose a single electron orbits about a nucleus containing two protons (+2e), as would be the case for a helium atom from which one of the naturally occuring electrons is removed. The radius of the orbit is 4.78 × 10-11 m. Determine the magnitude of the electron's centripetal acceleration.
At an outdoor market, a bunch of bananas attached to the bottom of a vertical spring of force constant 16.0 N/m is set into oscillatory motion with amplitude of 20.0 cm.
Explain how much waork has been done against gravity when the crate is raised a vertical distance of 2.19 m? The coefficient of friction is 0.316.
How far from the firing point is the height of the projectile.
An insulated Thermos contains 138cm3 of hot coffee at 95 °C. You put a 12g ice cube at its melting point to cool the coffee. By how numerous degrees has your coffee cooled once the ice has melted and equilibrium is reached.
Spider-Man attempts to save passengers on an out-of-control train using his web-slinging power. If the train (m = 137,000 kg) was at first travelling at 33m/s and he needs to stop it within 46 s, what is the magnitude of force he must provide.
Why does a shirt or blouse taken from a clothes dryer sometimes cling to your body?
The cord is then pulled from below, shortening the radius of the circle in which the block revolves to 0.10 . At this new distance, the speed of the block is observed to be 3.50. Explain by how much work was done by the person who pulled on the cor..
A car travels due east with a speed of 32.0 km/h, The traces of the rain on the side windows of the car make an angle of 52.0° with the vertical, Find the velocity of the rain
To which, according to the rotational analog of Newton's second law, is the angular acceleration experienced by an object directly proportional?
The 3.10 kg, 34.0-cm-diameter disk is spinning at 350 rpm How much friction force should the brake apply to the rim to bring the disk to a halt in 2.20 s.
A sailboat is traveling east at 5.0 m/s . A sudden gust of wind gives the boat an acceleration a = (0.80 m/s^2 , 40 degrees north of east). A)What is the boat's speed 4.5s later when the gust subsides? B)What is the boat's direction 4.5s later whe..
A machine part is made from a uniform solid disk of radius R = 0.18m and mass M = 8.3kg. A hole of radius R/2 is drilled into the disk, with center of the hole at the distance R/2 from the center of the disk.
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