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What are valence electrons, and how are they used in the formation of compounds? How is the number of valence electrons in an atom related to its tendency to gain or lose electrons during compound formation?
A severe thunderstorm dumped 2.5 in of rain in 30 min on a town of area 33km2. What mass of water (in kg) fell on town? One cubic meter of water has a mass of 103kg.
You have a string with a mass of 0.0127 kg. You stretch the string with a force of 9.19 N, giving it a length of 1.83 m. What is the wavelength of the standing wave you create
A 7.80-g bullet moving at 650 m/s penetrates a tree trunk to a depth of 5.4 cm. Use work and energy considerations to find the average frictional force that stops the bullet
Two snowballs are moving directly toward each other along a vertical axis. Just before the snowballs collide, Draw a before and after picture of the collision
The spring constant k = 700 N/m, mA=14 kg, and mB=18 kg. The collar Aslides on the smooth horizontal bar. The system is released from rest with the spring unstretched. Use conservation of energy to determine the velocity of the collar when it has ..
For a movie scene, a 71kg stuntman drops from a tree onto a 48kg sled that is moving on a frozen lake with a velocity of 12m/s toward the shore. obtain the speed of the sled after the stuntman is on board
The speed of a light wave in a certain transparent material is 0.501 times its speed in vacuum, what is its wavelength in nanometers
After being kidnapped and placed in the trunk of a car, you discover you are able to pry open the trunk. What was your average acceleration during this trip
Assume you are planning a trip in which a spacecraft is to travel at a constant velocity for exactly six months, as measured with a clock on board the spacecraft, and then return home at the same speed. Upon return, the people on earth will have aged..
A car is traveling at 26 m/s west and, at the next overpass, zips past a stationary police officer, who immediately begins accelerating at 3 m/s2. How far did the car travel before being caught
You want to build a grandfather clock with a pendulum that has one second between its "tick" (swinging to) and its "tock" (swinging fro)
design a low-temperature oven (heated box) with interior air temperature of 100°C. The interior dimensions of the box
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