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A 0.14-kg balloon is filled with helium (density = 0.179 kg/m3). If the balloon is a sphere with a radius of 5.3 m, what is the maximum weight it can lift?
kN
A circuit contains six 205 ohm lamps with 60 W bulbs and a 9 ohm heater connected in parallel. voltage across the circuit is 120 V.what is the current in the circuit when four lamps are turned on.
Consider an atom of sulfur (chemical symbol S), How many electrons does a neutral atom of sulfur have
Two resistors have resistances R(smaller) and R(larger), where R(smaller)
A spring loaded ballistic pendulum gun requires an increasing force to load, Calculate the work required to load the gun
Some GRIN material is made in the form of a doughnut. The inside diameter (the diameter of the hole in the doughnut) is 34 cm, What should be the highest, and the lowest refractive index of the material
The mass of the motor is four times the mass of the module. What is the speed (in km/h) of the command module relative to Earth just after separation?
A 2000 Hz sound wave passes through a wall with two narrow openings 30 cm apart. If sound travels on average 345 m/s, What is the angle of the first order maximum
A 7 g bullet collides horizonally with a 43 g block resting on a frictionless horizontal surface as shown in the accompany diagram. The bullet remain embedded in the block and subsequently causes the block to slide down a frictionless slope onto a..
Start with the thin lens equation and solve for the image distance in terms of the focal length and object distance. Use this to explain why you can expect a real image only
A 120g ball moving at 0.50 m/s in the + x direction is subject to a 0.25 N force in the - y direction for 2.5 s, Find the balls final speed
Two point charges of equal magnitude are 7.3cm apart. At the midpoint of the line connecting them, their combined electric field has a magnitude of 40N/C . Find the magnitude of the charges.
Speedboat A negotiates a curve whose radius is 152 m. Speedboat B negotiates a curve whose radius is 204 m. Each boat experiences the same centripetal acceleration. Illustrate what is the ratio vA/vB of the speeds of the boats?
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