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For a balloon ride, the balloon must be inflated with helium to a volume of 1500 m3 at sea level. The balloon will rise to an altitude of about 12 km, where the temperature is about -52 oC and the pressure is about 20 kPa. Assume the initial gas temperature and pressure to be 295 K and 1 atm.
How much helium should be put into the balloon?
Express your answer to two significant figures and include the appropriate units
Consider a generator with a 300 turn coil on its armature and a uniform magnetic field of 5.4 T. The diameter of the coil is 5.0 cm. how fast do we need to rotate the coil
Water is contained in a large tower that supplies a city. If the top of the water is 30 m above an outlet at the base of the tower, what maximum velocity can be expected at the outle.
When a man stands on his scale, it reads 92.6 kg. when hepulls down on a chin-up bar installed over the scale, the reading decreases to 75.1 kg. what is the magnitude of the force he exerts on the chin-up bar?
A gray kangaroo can bound across level ground with each jump carrying it 9.2 from the takeoff point. what is the max height above the ground
a 1.5 volt battery is placed in a circuit made with a cylindrical copper wire bent in the shape of a right triangle
two objects one with mass will 80 g and the other with mass 20 g are pushed by a spring in opposite directions. if the
A person lifts a 4.7 kg cement block avertical distance of 1.02 m and thencarries the block horizontally a distance of 9.10 m. How much work is done by gravity in the process
Light of wavelength 587.5 nm illuminates a slit of width 0.75 mm. Calculate the width of the central maximum
A point charge Q produces an electric field of magnitude 110.5 N/C at a distance of 1.48 m. If the field is directed toward the charge, What is the value of charge
A frictionless ramp is constructed so that it is at a 30 degree angle to the horizontal. It is 3.2 meters long and 1.6 meters high. How far along the rough patch do the blocks go before stopping
A 0.291-kg volleyball approaches a player horizontally with a speed of 12.2 m/s. What impulse is delivered to the ball by the player
A kangaroo is capable of jumping to a height of 2.62 m. Determine the takeoff speed of the kangaroo
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