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Decide the speed a proton of charge +e should move towards a stationary nucleus of charge +e (we presume the nucleus doesn't move) so it is able to get within 1.0e-15 m before stopping
A string with a length of 0.7 m is fixed at both ends. What is the longest possible wavelength for the traveling waves that can interfere to form a standing wave on this string
Moon effect. Some people believe that the Moon controls their activities. If the Moon moves from being directly on the opposite side of Earth from you to being directly overhead, by what percentage does (a) the Moon's gravitational pull on you inc..
A uniform-density 8 kg disk of radius 0.27 m is mounted on a nearly frictionless axle. Initially it is not spinning. A string is wrapped tightly around the disk, and you pull on the string with a constant force of 39 N by a distance of 0.7 m. Now ..
A person of mass 80kg stands at the center of a rotating merry-go-round platform of radius 3.2m, Calculate the rotational kinetic energy of the system of platform plus person before and after the person's walk
Monochromatic light falls on two very narrow slits0.042mm apart. Successive fringes on a screen6.50m away are 8.4cm apart near the center of the pattern. Determine the frequency of the light.
Amy is sitting on top of a building 50m high She throws ball with initial velocity of 10m/s upward at angle of 30 degrees to horizontal. g= 10m/s^2, Where does the ball strike the ground
A farsighted person can read printing as close as 25.0 cm when she wears contacts that have a focal length of 37.4 cm. What is the maximum angular magnification that the magnifying glass can provide for her
A mouse is running away from a cat at 0.75 m/s and, at 1.25 m from his mouse hole, he accelerates at a constant rate of 0.25 m/s2 until he reaches his hole safely. How long a time was required for him to cover the last 1.25 m?
How many molecules are in a volume of 1 m3 at a pressure of 2 atmospheres at a temperature of 0oC? How many moles is this? Does it matter what type of molecules these are (as long as they are gaseous at 0oC)?
A circular lake 1.0 km in diameter is 10 m deep (see the figure (Figure 1). Solar energy is incident on the lake at an average rate of 200 W/m2. If the lake absorbs all this energy and does not exchange heat with its surroundings, how long will it ta..
After 10.0 second, a spinning roulette wheel at a casino has slowed down to an angular velocity of +2.00 rad/s. Find the angular displacement of the wheel
Find what is a reasonable length of time for a normal person to run two meters, from a dead stop to full speed ahead
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