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A plane flying horizontally at a speed of 50.0 m/s and at an elevation of 160 m drops a package. Two seconds later it drops a second package. How far apart will the two packages land on the ground?
question a 51kg woman runs up a flight of stairs in 5.0s. her net upward displacement is 5.0m. approximately what
A person is making homemade ice cream. She exerts a force of magnitude 21 N on the free end of the crank handle on the ice-cream maker, what is the average power being expended
A friend of yours is loudly singing a single note at 411 Hz while racing toward you at 25.5 m/s on a day when the speed of sound is 341 m/s.
A rock is thrown vertically upward with an initial speed of 100 ft/s. At the same instant another rock is thrown vertically downward from the top of a 280 ft cliff with an initial speed of 40 ft/s. Find the time when the rocks pass each other
A red laser pointer with a wavelength of 635 nm is shined on a double slit producing a diffraction pattern on a screen that is 1.75 m behind the double slit. The central maximum of the diffraction pattern has a width of 4.30 cm, and the fourth bright..
To stretch a certain spring by 3.00 from its equilibrium position requires 9.50 of work. What was the maximum force required to stretch it
A small object, which has a charge q = 7.4 µC and mass m = 9.85 10-5 kg, is placed in a constant electric field. Determine the magnitude of the electric field
A hockey puck is swung at the end of a very slight 30 cm long string in a horizontal circle. what is the tension force supplied by the string
At that point its engines fail, and the rocket goes into free fall, with an acceleration of ?9.80 m/s2. What is its velocity just before it hits the ground
A child is in danger of drowning in the Merimac river. The Merimac river has a current of 3.1 km/hr to the east, How far from the dock does the boat reach the child
a car initially running at 10 m/s applies brake and stops in 10 secs. What is the deceleration produced by the brakes
A resistance R and a 3.4-H inductance are in series across a 60-Hz ac voltage. The voltage across the resistor is 34 V and the voltage across the inductor is 39 V. Assume that all voltages in this problem are rms voltages. (a) What is the resistance ..
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