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Consider a balloon containing hydrogenmolecules at room temperature (20°C) and atmospheric pressure.If the balloon has a spherical shape with radius of 12 cm, what is the number of molecules in the balloon?
In an attempt to reduce the extraordinarily long travel times for voyaging to distant stars, some people have suggested traveling at close to the speed of light. How fast must the rocket travel relative to earth
a 0.144 kg baseball is moving towards home plate with a speed of 43.0 ms when it is bunted. the bat exerts an average
An 75.0-N crate of apples sits at rest on a ramp that runs from the ground to the bed of a truck. The ramp is inclined at 30.0° to the ground. What is the direction of the contact force
Consider two identical particles of spin 1/2 that are confined in a cubical box of side L. Find the energy and the wave function of this system in the case of no interaction between the particles.
a car wheel with a diameter of 30 inches has a linear velocity of 30 mph. What is the angular displacement of the car whell during the 10 seconds of acceleration
A model rocket rises with constant acceleration to the height of 3.7, at which point its speed is 25. what was the magnitude of the rocket's acceleration.
What is the final temperature of the heating element
How much energy is required to accelerate a spaceship with a rest mass of 128 metric tons to a speed of 0.403 c?
A Step-Up transformer with 60 Hz AC power has an input voltage of 1000 V at a current of 2 Amperes, What is the current flowing out of the transformer
A 40-g object connected to a spring with a force constant of 30 N/m oscillates with an amplitude of 8 cm on a frictionless, horizontal surface. Find the total energy of the system
The radius of a typical human eardrum is about 4.0 mm. Find the energy per second received by an eardrum when it listens to sound that is at the threshold of hearing.
Two trains on separate tracks move toward each other. Train 1 has a speed of 115 km/h; train 2 a speed of 62.0 km/h. What is the frequency heard by the engineer on train 1
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