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Helium has the special property that its internal energy is directly proportional to its absolute temperature. Think a flask of helium by a temperature of 20°C. If it is heated until it has five times the internal energy, what will its temperature be?
The coefficient of kinetic friction between dresser and the floor is and is the acceleration because of gravity. The floor exerts upward normal forces with magnitudes and where the dresser's legs rest on the floor. Note that this is a 2-dimensiona..
An energy of 28.0 eV is required to ionize a molecule of the gas inside a Geiger tube, What maximum number of ion pairs can it create
Electrons are ejected from a certain metallic surface with speeds ranging up to 4.2 105 m/s when light with a wavelength of ? = 615 nm is used. What is the work function of the metal?
A professor's office door is 0.96m wide, 2.2mhigh, 4.0cm thick; has a mass of 26kg , and pivots on frictionless hinges. what is its angular acceleration immediately afterward
magnetoencephalography meg is a non-invasive method for studying electrical activity in the brain. it is based on the
Red light travels at 2.07×108 m/s in a particular type of oil. What is the index of refraction for red light in the oil
The height of a tower is measured with attaching a simple pendulum to its ceiling, whose length is barely enough to stay off the floor. The pendulum is let go from a small angle, and takes12 s to return to the similar location it started from.
A particle oscillates with S.H.M. The maximum displacement from its mean position is 0.5 meter and frequency of motion is 10 Hz. at time t=0, particle is located at 0.15 meter and has the velocity of 24.0 m/s towards the negative x-axis.
A 0.88 kg ball is moving horizontally with a speed of 4.9 m/s when it strikes a vertical wall. find the magnitude of the change in linear momentum of the ball
A bike and rider have a total mass equal to 200 kilogram. Calculate the net force on the bike
The electric field at the point x = 5.00 cm and y = 0 points in the positive x direction with a magnitude of 5.00 N/C. Find the location of the point charge
A 750g, 50-cm-long metal rod is free to rotate about a frictionless axle at one end. What is the rod's angular velocity immediately after the blow
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