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A hot air balloon decends toward the ground with a velocity of (1.6 m/s). A champagne bottle is opened to celebrate takeoff, expelling the cork horizontally with a velocity of (4.8 m/s) relative to the balloon. When opened, the bottle is 5.8 m above the ground. (Neglect air resistance.)
(a) What is the initial velocity of the cork, as seen by an observer on the ground? in the x and y direction
(b) What is the speed of the cork, and its initial direction of motion, as seen by the same observer?
(c) Determine the maximum height above the ground attained by the cork.
(d) How long does the cork remain in the air?
The magnetic field in the region between the poles of an electromagnet is uniform at any time, but is increasing at the rate of 0.060 T/s. What is the magnitude of the induced emf
one 73" c8x11.5 steel beem is connected to a 22" c8x11.5 fish plate made up of 6x15x1/4 steel plate on each side bolted togething using 3/4" structural bolts, What is the Max capacity of this beam
A square steel plate is 0.2 m on a side and 4 mm thick. Find the displacement of the plate
A vacuum cleaner is connected to a 120V socket and uses 3.0 A when the back emf generated by the electric motor is 72 volts. What is the resistance of the coil in the motor?
A 20.0 kg wood ball hangs from a 1.70 m-long wire. The maximum tension the wire can withstand without breaking is 500 N. What is the largest speed this projectile can have without causing the cable to break
A current is flowing through a circuit and you open a switch. Why might a spark jump across the switch opening? Explain what is happening? What property of the circuit would be relevant to this phenomenon?
What is effectiveness of battery as an energy storage device
The Space Shuttle travels at a speed of about 7.6 × 103 m/s. The blink of an astronaut's eye lasts about 110 ms. How many football fields (length = 91.4 m) does the Shuttle cover in the blink of an eye
A force platform is a tool used to analyze the performance of athletes measuring the vertical force that the athlete exerts on the ground as a function of time. With what speed did she reach the platform
When a missile is shot from one spaceship toward another, What is the relative velocity of the two ships
A 295 Kg piano slides 4.1 m down a 30 degree incline and is kept from accelerating by a man who is pushing back on it parallel to the incline. The effective coefficient of kinetic friction is .40.
A camera with a 70.0-mm lens can focus on objects located from 1.40 m to an infinite distance away by adjusting the distance between the lens and the film. how far does the lens move with respect to the film
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