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Calculate the uncertainty in momentum and velocity of an electron in a 1 Å box (1 dimenstional), a hydrogen atom in a 10 Å box, and a 1 g ball bearing in a 10 cm box.
A circuit consists of a 9.0-V battery connected to three resistors (37 ?, 17 ?, and 150 ?) in series. Find the current that flows through the battery
In a three pulley system a man who weighs 875.0N is standing upright holding on one end of the rope while the other end is tied to his feet. Estimate the normal force from the ground
obtain the equation of motion for a 125g mass at the end of a perfectly elastic spring which when stretched 14.5 cm from equilibrium, find the maximum velocity and total energy of the mass
You have a beach ball which has a radius of 25 cm and a mass of 0.5 kg. You have a lead ball which has the same radius but has a mass of 120 kg. what is the buoyancy force felt by the lead ball
You are given a pendulum composed of a 0.024 kg mass on the end of a 0.60 m long massless string. Find the gravitational potential energy of the mass
A 106g Frisbee is 18cm in diameter and has half its mass spread uniformly n the disk and the other half concentrated in the rim. What is the Frisbee's rotational inertia
A molecule of DNA (deoxyribonucleic acid) is 2.35 µm long. The ends of the molecule become singly ionized: negative on one end, positive on the other. Determine the effective spring constant of the molecule
A force applied to an object of mass m1 produces an acceleration of 3.60 m/s2. find its acceleration under the action of the force
A spring (k =805N/m) is hanging from ceiling of an elevator, and a 5.0-kg object is attached to the lower end. By how much does the spring stretch (relative to its unstrained length) when the elevator is accelerating upward at a = 0.47m/s2.
Two compact sources of sound oscillate in phase with a frequency of 90 Hz where the speed of sound is 340 m/s. What is the amplitude of the resultant wave at that point
When the heart pumps blood into the aorta, the pressure gradient-the difference between the blood pressure inside the heart and the blood pressure in the artery-is an important diagnostic measurement. What is the speed of the blood in the aorta
what parasitic forms can be seen in the feces of a patient with hookworm? cryptosporidiosis? tapeworm?
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