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An archer shoots an arrow toward a 300 g target that issliding in her direction at a speed of 2.00 m/s on a smooth, slippery surface. The 22.5 garrow is shot with a speed of 35.0 m/sand passes through the target, which is stopped by the impact. What is the speed of the arrow after passing through the target?
Sun is falling towards a supermassive black hole in the centre of a galaxy. At some point, the star will start to be torn apart; for what black hole mass M(crit) does this happen at the event horizon?
A child in a boat throws a 5.45-kg package out horizontally with a speed of 10.0 m/s. Calculate the velocity of the boat immediately after, assuming it was initially at rest
Six electrons are confined to a 2-dimensional square infinite potential well with sides of length L. What is the ground state energy of the system
A 25 cm Diameter coil consists of 50 turns of circular copper wire 2.5 mm in diameter. Determine the rate at which tyhermal energy is produced
A steel ball is dropped onto a hard floor from a height of 1.55 m and rebounds to a height of 1.52 m. Calculate its acceleration during contact with the floor if that contact lasts 0.0800 ms
A sample containing beryllium (atomic mass 9 u), aluminum (27 u), and an unknown element is placed in a mass spectrometer. What is the mass of the unknown element
A nickel crystal is used as a diffraction grating for x-rays. Then the same crystal is used to diffract electrons. what is the kinetic energy of each electron
A person with perfect pitch sits on a bus bench listening to the 450{\rm Hz} horn of an approaching car. how fast is the car moving
As a baseball is being caught, its speed goes from 43 to 0 m/s in about 0.003 s. What is the baseball's acceleration in m/s2
An object is placed 19cm from a certain mirror. The image is half the size of the object, inverted, What is the radius of curvature of the mirror
A quantity of heat is removed from a hot reservoir at absolute temperature T and then is added to a cold reservoir at absolute temperature T/2. The cold reservoir experiences an entropy increase S. What is the change in the entropy of the universe..
Lemur and Chimp find a 200-kg treasure chest filled with gold plated bananas. What is the speed of the treasure chest after sliding 30 m down the incline
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