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The Earth has a mass of 5.98 1024 kg. The average mass of the atoms that make up the Earth is about 40 u. Based on this average mass, how many atoms are in the Earth? ________ atoms
A merry-go-round starts from rest and accelerates uniformly over 10.5 s to a final angular velocity of 6.90 rev/min. Find the person's maximum radial acceleration
A sample of 2.3×1010 atoms that decay by alpha emission has a half-life of 150 min. How many alpha particles are emitted between t=30 min and t=160 min
A car is parked on a cliff overlooking the ocean on an incline that makes an angle of 16.0° below the horizontal. The length of time the car is in the air
What is the (a) “current” due to the electron orbiting in a circular path about the proton in a hydrogen atom? Take the orbital radius to be r = 0.0529 nm.] (b) What magnetic field strength does this “electron current” create at the proton locatio..
A roller coaster is traveling along a vertical circular loop, How much work is done by the frictional force from Position 1 to Position 2
An RL circuit with L = 3 H and an RC circuit with C = 5 µF have the same time constant, What is this common time constant
A string is wrapped tightly around the circumference of a wheel with a mass of 1.23kg and a radius of .324m. What is the moment of inertia of the wheel
Raindrops fall 1000 m from a cloud to the ground. If they were not slowed by air resistance, how fast would the drops be moving when they struck the ground
A mass (m=5kg) is attached to a horizontal spring and placed on a frictionless surface. The spring-mass system is compressed, and released. What is the total energy of the spring-mass system
Two automobiles, each of mass 1000 kg, are moving at the same speed, 20 m/s, when they collide and stick together. In what direction and at what speed does the wreckage move a) if one car was driving north and one south? b) if one car was driving no..
You have two 120V light bulbs, one 25W and one 100W, that are normally connected in parallel with 120V across each. explain Which one burned out and why
David is driving a steady 24 when he passes Tina, who is sitting in her car at rest. Tina begins to accelerate at a steady 2.70 at the instant while David passes. How far does Tina drive before passing David.
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