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Why is it that when you look at a coin in a fountain or cup of water, its position is not exactly what it appears from the top? Or, why does the water in a swimming pool look shallower from the outside than when you step in?
two vehicles approach a right angle intersection and then collide. after the collision they become entangled. if their
a how much work is done on the steam when 1.00 mol of water at 100 degrees celcius boils and becomes 1 mol of steam at
A projectile is fired at an upward angle of 45° from the topof a 288 m cliff with a speed of212 m/s. What will be its speed when itstrikes the ground below? (Use conservation of energy.)
Estimate how many cubic meters of air an average person breathes in two weeks. A typical human breathes about 12 L per breath
As you zip through space in your PPS (personal propulsion suit), your pulse rate, as you count it, is 121 bpm, How fast are you moving with respect to the Moon
Where does the bare (5) come from, in the spring equation. I know where the .5 comes from (1/2), I know where the 1.2 comes from (Spring force), I know where the .05 comes from (5 CM, right?) -- so where does the 5 come from, and why isn't the .05 cm..
a tortoise and hare start from rest and have a race. as the race begins both accelerate forward. the hare accelerates
A 2.0 kg mass is attached to the end of horizontal spring (k = 50 N/m), What is the maximum speed of the mass
An organ pipe closed at one end and open at the other end has two successive harmonics with frequencies of 2170 Hertz and 2790 Hertz. What is the fundamental frequency of the pipe
Two forces, F1and F2 , act on an object. The magnitude of F1 is 12.45 N, and it is at an angle of 32o above the x-axis in the second quadrant. What are the magnitude and direction of the resultant force
You are sitting in a wagon and rolling horizontally at 5 m/s when your little sister jumps into your lap as you pass by. Calculate the speed of the wagon after your little sister jumps in
An alpha particle ( a doubly ionized helium atom with a mass of 6.64 x 10^-27 kg) is traveling with a velocity v=1x10^6 m/s j, What direction is the magnetic field above
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