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You and your friend throw balloons filled withwater from the roof of a several story apartmenthouse. You simply drop a balloon fromrest. A second balloon is thrown downwardby your friend 3.7 s later with an initial speedof 72.52 m/s. They hit the ground simultaneously.How high is the apartment house? Theacceleration of gravity is 9.8 m/s2. Neglectair resistance.Answer in units of m.
A high-speed lifting mechanism supports a 845-kg object with a steel cable that is 40.0 m long and 4.00 cm2 in cross-sectional area. (a) Determine the elongation of the cable. mm
A source of 116m In (half-life = 54.0 min.) is counted using a G-M tube. Successive 1-min observations gave 131,340 counts, calculate the true interaction rate in the G-M tube at 12:00
a flash unit for a camera has a capacitance of 1155 microf. what resistance is needed in this rc circuit if the flash
A worker is walking on a concrete ramp. The static friction coefficient between his soles and the ramp is 0.91, What is the largest ramp angle for which we could walk
sound with frequency 1220 leaves a room through a doorway with a width of 1.16 . at what minimum angle relative to the
You are driving south on a highway at 25 m/s (approximately 55mi/h) in a snowstorm. When you last stopped, you noticed that the snow was coming down vertically, however it is passing the windows of the moving car at an angle of 37° to the horizontal...
A special electronic sensor is embedded in the seat of a car that takes riders around a circular loop-the-loop at an amusement park. Determine the speed of the rider at the top of the loop
Find the angular velocity, in rad/s , of the earth due to its daily spin on its axis, the earth due to its yearly motion around the sun, and our moon due to its monthly motion around the earth
An object moves along the x axis according to the equation x = 3.35t2 ? 2.00t + 3.00, At what time is the object at rest
two blocks with masses m1 4.6kg and m2 3.8 kg are connected by a light spring on a horizontal frictionless table. at
nuclear-pumped x-ray lasers are seen as a possible weapon to destroy icbm booster rockets at ranges up to 2000 km. one
A neuron is stimulated with an electric pulse. The actionpotential is detected at a point 3.4 cm down the axon, .0052slater. What is the speed of the electric pulse along the axon
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