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A sphere that is a perfect blackbody radiator has a radius of 0.100 m and is at 290 degrees celcius in a room where the temperature is 31 degrees celcius. Calculate the net rate at which the sphere radiates energy.
A rifle with a barrel length of 58 fires an 11 bullet with a horizontal speed of 370. The bullet strikes a block of wood and penetrates to a depth of 15.
A competitive mini-golf player notices an opponent's ball situated 50cm in front of a wall containing two tunnels. One tunnel leads to the hole, the other to a bunker. The player skill fully putts their ball due East at the opponent's ball with a ..
A student places an object on the 5.0 cm mark of the meter stick. He places a positive lens that he knows has a focal length of 15.0 cm at the 30.0 cm mark on the meter stick. From the data what is the focal length of the negative lens
A pump is required to lift a mass of 780kg of water per minute from a well of depth 13.7m and eject it with a speed of 17.9m/s, What must be the power output of the pump
Describe the unique behavior of water (thermal expansion and specific heat capacity) that make it essential for life on Earth. 5-8 sentences
Find out the angle between the filter's polarizing axis and the direction of polarization of light necessary to increase the ratio of the clouds' intensity to that of blue sky so that it is three times the normal value.
A point charge Qpt= 10nC is surrounded by an insulating material and stuffed inside a spgerical steel shell iwth inner radius R1=1cm and outer R0=2cm; What is the net charge of the steel shell
An uncharged 20 uF capacitor is connected to a power supply set to 10 V. how much more charge flows onto the plates
If the value of the linear charge density is ? = 40.5 ?C/m and the distance between the two cables is D = 40.5 m, calculate the electric field midway between the two cables
A circus performer stretches a tightrope between two towers. He strikes one end of the rope, find the tension in the tightrope
How much horizontal force should a sprinter of mass 57.0 exert on the starting blocks to produce this acceleration.
Two point charges -2Q and +3Q are on the x-axis, -2Q at the origin and +3Q at x = D. Find two points on the x-axis within the vicinity of the charges where the electric potential is zero
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