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Question:
Larry Water purchased 45 weather balloons and several tanks of helium, inflated the balloons, attached them to a lawn chair and tied himself to the chair. When he cut the cord attaching the chair to his jeep he shot up into the air and didn't stop climbing until about 11,000 feet.
make a rough estimate of the total volume of helium gas needed to cause such an incident. If all that helium were used to fill one single spherical balloon what would be the approximate diameter of that balloon? Some versions of the story claim that the lift was caused by 100 ordinary helium party balloons. Is that believable, and why, or why not? Identify all the assumptions that were made in coming up with your answer.
Democritus, Dalton, Thomson, Rutherford, and Bohr all had major accomplishments in uncovering the fundamental building blocks of matter.
Identical point charges of +2.6 µC are fixed tothree of the four corners of a square. What is themagnitude q of thenegative point charge that must be fixed to the fourth corner, so that the charge at the diagonally opposite corner experiences a netfo..
When ultraviolet light with a wavelength of 246nmfalls upon a clean metal surface, find the photoelectric threshold wavelength for this metal
A baseball (mass 0.14 kg, radius 3.7 cm) is spinning with an angular velocity of 98 rad/s. What is its rotational kinetic energy
You have an uncharged capacitor (12 x 10-6 F) and a resistor (1000 ohms) connected to a battery of 200 V at time t=0, What is the final charge on the capacitor
A rigid rod of mass m3 is povited at point A, and masses m1 and m2 are hanging from it, as shown. Point A L1 m3 L2 m1 m2 (a) What is the normal force acting on the pivot point? (b) What is the ratio of L1 to L2, where these are the distances from the..
A mortar crew is positioned near the top of a steep hill. Enemy forces are charging up the hill and it is necessary for the crew to spring into action.
A 440.0 Hz tuning fork is sounded together with an out-of-tune guitar string, and a beat frequency of 3 Hz is heard. When the string is tightened, the frequency is heard to decrease. What was the original frequency of the guitar string?
An electric dipole is situated such that +q is at coordinates (+d,0) and -q is at (-d,0)?. Point P is located at (+2d,+2d) What is the magnitude of the electric field at point P?
A car drives around a curve with radius 410 meter at a speed of 32m/s. The road is banked at 5 degree. the mass of car is 1400 kilogram. Calculate what is the frictional force on the car
A 7.0 kilogram box slides a 14 meter distance on ice. If the coefficient of kinetic friction is 0.24, evaluate what is the work done by the friction force
Average operating pressure for the Pump A circuit is estimated to be 1600 psi. Pump and motor overall efficiencies are estimated to be 93.5%.
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