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A 9kg object is suspended from the ceiling by a strong spring, which then undergoes simple harmonic motion with a period of 0.4s. The block is brought to rest, and the equilibrium length of the spring with the block attached is measured. By how much this length reduced when the block is removed?
One gram of water changes from liquid to solid at a constantpressure of 1.00 atm and a constant temperature of 0°C. Find the change in the internal energy of the water
In laser eye surgery, the laser emits a 1.32-ns pulse focused on a spot that is 35.4um in diameter. If the energy contained in the pulse is 2.54 mJ, what is the power per square meter (the irradiance) associated with this beam
The electric field midway between two identical but opposite point charges is 886 N/C, and the distance between the charges is 23 centimeter. Obtain the magnitude of the charge on each
The magnetic force per meter on a wire is measured to be only 27 percent of its maximum possible value. Find the angle between the wire and the magnetic field
The hour hand on a certain clock is 9.0 centimeter long. Determine the tangential speed of the tip of this hand
What is the magnitude of the electric force between two electrons separated by a distance of 0.14 nm
A tiny 0.0250 microgram oil drop containing 15 excess electrons is suspended between to horizontally closely-spaced metal plates that carry same but opposite charges on their facing surfaces. Determine which plate must be positive, the upper one or..
A small mirror is attached to a vertical wall, and it hangs adistance of 1.82 m above the floor. The mirror is facing due east,and a ray of sunlight strikes the mirror early in the morning andthen again later in the morning.
When a 19.6 kg wheel with an angular speed of 2.20 rad/s is disconnected from a motor, a 0.238 N · m frictional torque slows the wheel to a stop. how long will it take for the wheel to come to rest
A stone is thrown upwards with an initial velocity of 60 km/h. Calculate the maxiumum height from the ground
If twice the force is exerted over twice the distance, how does the resulting increase in kinetic energy compare with the original increase in kinetic energy?
a place a charge of -8.60 microc at point p and find the magnitude and direction of the electric field at the location
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