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A spherical balloon is made from a material whose mass is 2.33 kg.The thickness of the material is negligible compared to the 1.77-mradius of the balloon. The balloon is filled with helium (He) at atemperature of 283 K and just floats in air, neither rising norfalling. The density of the surrounding air is 1.19kg/m3. Find the absolute pressure of the helium gas.
A coil has a DC resistance of 90 ? and animpedance of 200 ? at a frequency of 1.5 kHz. What is the inductance of the coil
A 0.740 m long brass pendulum experiences a 20.0°C temperature increase, Find the ratio of the change in period to the original period, What is the change in the period
Suppose you are at the earth's equator and observe a satellite passing directly overhead and moving from west to east in the sky. How far above the earth's surface is the satellite's orbit
The electric field between the plates of a paper-separated (K-375) capacitor is 8.20×10^4 V/m. estimate the area of each plate
A potential difference of 75 mV exists between the inner and outer surfaces of a cell membrane. The inner surface isnegative relative to the outer surface. How much work is requiredto eject a positive sodium ion (Na+) from the interior of the cell..
Two in-phase loudspeakers that emit sound with the same frequency are placed along a wall and are separated by a distance of 5.00 m. What is the frequency of the sound
What daily energyintake, in Calories, is required to maintain these basic processes?This is the minimum daily caloric intake needed to avoidstarvation.
A square coil, enclosing an area with sides 3.4 cm long, is wrapped with 2,224 turns of wire. What average voltage is induced in the coil
A 1,720-Hz pure tone is played on a stereo in an open field. A per- son stands at a point that is 4 m from one of the speakers and 4.4 m from the other. Does the person hear the tone
One has a capacitance of 2.0 µF and the other a capacitance of 4.0 µF. These two capacitors together store 4.50 10-5 C of charge. What is the voltage of the battery
Consider a system of three noninteracting identical bosons that move in a common external one dimensional harmonic oscillator potential. Find the energy levels and wave functions of the ground state, first excited state, and second excited state of t..
Close a door by pushing on the doorknob. Close the door again using approximately the same force but applying it 5 centimeters away from the hinges. Try again by applying the force on the edge of the door in a direction pointing toward the hinges. Su..
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