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A weather balloon filled with helium gas has a volume of273 m3 and pressure 1.4 105 Pa at the Earth's surface (where thetemperature is 293 K). The balloon is then released and moves to ahigh altitude, where the pressure in the balloon is 24750 Pa and the temperature is 231 K (-23°C). What is the new volume ofthe balloon?
m3
a 7.60 cm length of straight wire runs horizontally along a north-south line. the wire carries a 3.25a current flowing
A parallel-plate capacitor with circular plates of radius 65 mm is being discharged by a current of 7.5 A. What is that maximum value
A uniform plank of length 4.7 m and weight 221 N rests horizontally on two supports, with 1.1 m of plank hanging over the right support. To what distance x can a person who weighs 440 N walk on the overhanging part of the plank before it just begi..
A 1600 kg car traveling eastward at 32 m/s collides at an intersection with a 700 kg motorcycle traveling northward at 45 m/s. What is the direction of the car's velocity after the collision
A roller coaster reaches the top of the steepest hill with a speed of 4.0 km/h. Estimate its speed when it reaches the bottom
Assume the balloon and rod to be point charges. The Coulomb force constant is 1/(4? ?0) = 8.99 × 10^9 N·m2/C2 and the acceleration due to gravity g = 9.81 m/s2.
if the period of a 10m long pendulum is 18s on an asteriod then what is the acceleration due to gravity on the
What is the force exerted on beam by the fixture P (P is where the beam is attached horizontally to the brick wall) at the wall (magnitude and direction).
A helicopter is ascending vertically with a speed of 5.03m/s. How much time does it take for the package to reach the ground
At rest a person has a metabolic rate of 4.2 x 10^5 J/hr. The person is submerged neck-deep into a tub containing 1.0 x 10^3 kg water at 27.00 degrees Celcius. what is the water's temperature after a half hour
In an action-adventure film, the hero is supposed to throw a grenade from his car, which is going 94.0 km/h, to his enemy's car, which is going 112 km/h. Find the magnitude of the velocity relative to the earth
A galvanometer with a coil resistance of 9.27Ω and a full-scale current of 0.175 mA is used with a shunt resistor to make an ammeter. The ammeter registers a maximum current of 5.98 mA. Find the equivalent resistance of the ammeter.
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