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A student at the top of a building throws a ball straight upward with an initial speed v0. Then he throws a second ball straight downward with the same initial speed as the first. How do the final velocities of the balls compare when they reach the ground? (which is greater or are they equal?)
A 0.30 kg softball has a velocity of 12 m/s at an angle of 35° below the horizontal just before making contact with the bat. The ball leaves the bat 2.0 ms later with a vertical velocity of magnitude 10 m/s. What is the magnitude of the average f..
A 1.56m tall student stands before a vertical mirror. She can just see her whole body, from head to toe. How tall is the mirror
Using the Bohr model what is the radius of the electron orbit in the Hydrogen atom when the electron is in the n = 2 state, What is the energy of the Hydrogen atom
Three point charges are arranged at the corners of a square, with charge -Q on both the particle at the upper left corner and the particle at the lower right corner and with charge +2Q on the particle at the lower left corner.
the supersonic aircraft concorde has a length of 61.5m when sitting on th ground on a typical day when the temperature is 15.0 degrees C. what is the temperature of the concordes skin in flight
Using the equation for the period of a pendulum, determine the period of a pendulum that is 3.0m long, Estimate the spring constant for each of the four springs on a 1260kg car if the static weight of the car causes the springs to compress 10.0cm
A potential difference of 100 mV exists between the inner and outer surfaces of a cell membrane. How much work is required to eject a positive sodium ion (Na+) from the interior of the cell
A compact disc rotates from rest up to an angular speed of 31.4 rad/s in a time of 0.892 s. What is the magnitude of the tangential acceleration
The plate seperation of a parallel plate capacitor is 1 cm. The potential on the negatively charged plate of the capacitor is zero. find the strength of the electric field in the capacitor
Flying fish are able to leap out of the water to evade predatores and typically fly a distance around 5.0.0m and have reached altitudes of 6.00m. How long is the flying fish airborne
A soccer player kicks a rock horizontally off a 34.0-m-high cliff into a pool of water. what was the initial speed given to the rock
How many cm/s2 of acceleration should correspond to 1 unit of ramp slope if: •a graph of number of paper clips needed to maintain equilibrium vs. what would be the acceleration of the cart
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