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A spherical balloon is made from a material whose mass is 2.57 kg. The thickness of the material is negligible compared to the 1.22-m radius of the balloon. The balloon is filled with helium (He) at a temperature of 296 K and just floats in air, neither rising nor falling. The density of the surrounding air is 1.19 kg/m3. Find the absolute pressure of the helium gas.
A m1 = 14.50 kg object and a m2 = 10.00 kg object are suspended, joined by a cord that passes over a pulley with a radius of 10.00 cm and a mass of 3kg.
In a classroom demonstration, a speaker was mounted on the end of a 50.0 cm long arm, Calculate the range of sound frequencies heard by the students in the classroom
a car is traveling due north at 19.3m/s. find the velocity of the car after 7.03 s if its acceleration is 1.30m/s^2 due north
A 2530 {\rm kg} satellite used in a cellular telephone network is in a circular orbit at a height of 710 {\rm km} above the surface of the earth. What is the gravitational force on the satellite
The highest recorded waterfall in the world is found at Angel Falls in Venezuela. Its longest single waterfall has a height of 807 m. what is the maximum temperature of the water
A volumetric flask made of Pyrex is calibrated at 20.0 °C. It is filled to the 175-mL mark with 36.5 °C Mercury. After the flask is filled, What is the volume of the acetone when it cools to 20.0 °C
The magnitude of the vector is 45.0 units and points in the direction 386 counter clockwise from the positive x-axis. Calculate the x-component of this vector.
A jet flying at 136 m/s banks to make a horizontal circular turn. Calculate the magnitude of the necessary lifting force
questiontwo hockey players aaron and brunnhilde are pushing two pucks on a frictionless ice rink. the pucks are at
Having found the minimum kinetic energy of an alpha particle inside a nucleus to be roughly 2.0 Mev, and given that the typical kinetic energy of an emitted alpha particle is 5.0 MeV, is actually possible for the alpha particle to have existed inside..
A lamp is placed 10 cm in front of a concave spherical mirror that forms an image of the filament on a screen placed 3.0 m from the mirror. how tall is the image
q1. throughout a hard sneeze your eyes may shut for 0.41 s. if you are driving a car at 98 kmh during such a sneeze how
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