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Consider a 0.20-kg ball interacting gravitationally with the earth. Imagine that we set up a reference frame in standard orientation on the earth's surface and define ground level to be the reference separation and set z = 0 there. Imagine that a person at the bottom of a well throws the ball upward and that when the ball leaves the person's grasp 8.0 m below the ground, it has a speed of 6 m/s. What is the system's total energy at this time?
if the battery in a circuit is taken out and the current becomes zero. how does the current remain zero without the battery
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
Standing on ground 3.5 from the wall of a building, you want to throw a package from your 1.6 shoulder level to someone in a second-floor window 4.5 above the ground.
A simple 1.3m long pendulum oscillates at a location where g=9.81. How many complete oscillations does it make in 4.00min
A uniform 270N ladder rests against a perfectly smooth wall, making a 40.0? angle with the wall. What is the friction force on the ladder at the floor
Consider an electron in the ground state of the hydrogen atom, separated from the proton by a distance of 0.0529 nm. Viewing the electron as a satellite orbiting the proton in the electrostatic potential, calculate the speed of the electron in its ..
Two equal masses, one initially at rest and the other traveling to the right at a speed of 3.6 m/s, elastically collide. Determine the final speed of both masses
Suppose a single electron orbits about a nucleus containing two protons (+2e), as would be the case for a helium atom from which one of the naturally occuring electrons is removed. The radius of the orbit is 4.41 × 10-11 m. Determine the magnitude..
In one day, a 85 kg mountain climber ascends from the 1440 m level on a vertical cliff to the top at 2360 m . The next day, she descends from the top to the base of the cliff, which is at an elevation of 1310 m
A block of mass M = 5.90 kg, at rest on a horizontal frictionless table, is attached to a rigid support by a spring of constant k = 5960 N/m. find the amplitude of the resulting simple harmonic motion
Calculating magnetic flux, induced current & magnetic field.
two forces one equal to 15 n and another equal to 40 n act on a 50-kg crate resting on a horizontal surface.a. what is
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