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A hot air balloon is rising straight up with a speed of 5 m/s. A ball at bag is released from rest relative to the balloon when it is 9.6 meter above the ground. Obtain how much times elapses before the ballast bag hits the ground? Determine how many second would it take?
How various revolutions per minute would a 21 -diameter Ferris wheel need to make for the passengers to feel "weightless" at the topmost point.
in a city with an air-pollution problem a bus has no combustion engine. it runs on energy drawn from a large rapidly
an electron travels at a speed of 2.0 x 104 ms through a uniform magnetic field of strength 1.2 x 10-3 t. what is the
A girl jumps on bike and exerts torque of 25.0 N-m perpendicular to the pedal. Moment of inertia of bike wheel is I = 0.045kg-m^2. What is angular velocity of bike wheel at end of this time
A 0.670 m long solenoid is formed by wrapping 420 turns of wire around a hollow cylinder with a radius of 0.130 m. calculate the energy stored in the field
question a proton is accelerated through a potential difference of 150v. it then enters a region of uniform magnetic
A converging lens (f = 13.0 cm) is held 6.20 cm in front of a newspaper, the print size of which has a height of 2.20mm. Find (a) image distance (in cm) and (b) height (in mm) of the magnified print.
What is the velocity of each ball. while both pipes vibrate at their fundamental frequencies, a beat frequency of 15 Hz is heard. How many centimeters were cut off the end of the second pipe? The speed of sound is 343 m/s.
A helium atom (mass of helium atom = 6.646 x 10-27 kg), initially at rest, emits a photon of energy 40.8 eV. What is the speed of the Helium atom after releasing this photon
Two sinusoidal waves of the same frequency travel in the same direction along a string. If ym1 = 5.5 cm, ym2 = 4.2 cm, ?1 = 0, and ?2 = ?/4 rad, what is the amplitude (in cm) of the resultant wave?
Solar Cell A solar cell generates a potential difference of 0.10 V when a 600 resistor isconnected across it, and a potential difference of 0.15 V when a1150 resistor is substituted. What is the emf of the solar cell?
Data on the modulus of elasticity obtained 1 minute after loading in a certain configuration and 4 weeks after loading for the same lumber specimens is presented here.
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