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A mountain climber stands at the top of a 50 m cliff that over hangs a calm pool of water. She throws two stones vertically downward 1.00 sec apart and observes that they cause a single splash. The first stone had an initial velocity of -2.00 m/s (a) how long after release of the first stone did the two stones hit the water? (b) What initial velocity must the second stone have had, given that they hit the water simultaneously? (c) What was the velocity of each stone at the instant it hit the water?
for safety in climbing a mountaineer uses a nylon rope that is 50 m long and 1.0 cm in diameter. when supporting a
During the takeoff of an airplane, a passenger removes his tie and lets it hang loosely from his fingers. What is the speed of the plane at takeoff
The plane of a 6.0 cm × 8.0 cm rectangular loop of wire is parallel to a 0.16-T magnetic field. The loop carries a current of 6.8 A. What is the magnetic moment of the loop
A 1.00 kg sphere of radius 10.0 cm is rolling down a ramp with ramp angle 30 degrees. What is the acceleration of the center of mass of the sphere
The average Nascar race car weighs 3,400 lbs. At a recentNascar race the cars went flying around the banked curves atDaytona International Raceway. What is the centripetal force on the car keeping it goingaround the curve at a speed of 200 mph
A Molecule of DNA is 2.17 um long. The ends of the molecule become strongly ionized: negative on one end, positive on the other. The helical molecule acts like a spring and compresses 0.78% upon becoming charged. Determine the effective spring con..
the results of a ballistic pendulum measurement are as followsmass of ball m 50 gramsmass of pendulum m250 gramsheight
A rock is dropped off the top of a house. On the way down, the rock passes a window. Obtain the velocity of rock at bottom of the window
An electromagnetic wave has a magnetic field of rms value 3.0 x 10^-6 T. What is the intensity of the wave
A 5000 kilogram lunar lender is in orbit 30 kilometer above the surface of the moon. Determine how much work do the thrusters do
What is the speed of a beam of pions if their average lifetime is measured to be 4.40 x 10-8 s? At rest, their lifetime is 2.60 x 10-8 s
Two pianos each sound the same note simultaneously, but they are both out of tune. How much time separates successive beats
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