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A super nova releases 1.0×1045 J of energy.It is 1670 ly from earth. If you were facing the star in question,and your face was a circle 7 cm in radius, how much energy would reach your face?
An airplane flying horizontally at a constant speed of 350 km/h over level ground releases a bundle of food supplies. Ignore the effect of the air on the bundle. find the bundle's initial vertical component of velocity
A charge of -4.26 micro-Coulombs is fixed at the center of a compass. find direction of the net electrostatic force acting on the charge
The given information is that a basketball is shot from an initial height of 2.40 m with an initial speed 14m/s directed at an angle 37 degrees above the horizontal
a 100-kg mass is pulled along a frictionless surface by a force f such that its acceleration is 6 ms2. a 20-kg mass
What diameter has the tip of the minute hand with 100mil/hr tangential speed? Illustrate what diameter has the tip of the hour hand with 100mil/hr speed?
a soccer player kicks the ball toward a goal that is 25.0 m in front of him. the ball leaves his foot at a speed of
The pilot of the spaceship measures the length of the moving ship as 30 meters. Establish its length as measured by a person on earth.
A rifle is aimed horizontally at a target 54.0m away. The bullet hits the target 2.60cm below the aim point, What was the bullet's flight time
In the system shown in figure. A horizontal force Fx with a magnitude of 100N acts on object of mass m2=6.15kg. The horizontal force is frictionless. ( Picture- a flat table with mass m2 connected with a string to a pulley and mass 1 hangs off the ta..
A fisherman notices that his boat is moving up and down periodically without any horizontal motion, How fast are the waves traveling
The sound level measured in the room by a person watching a movie in a home theatre system varies from 63 dB throughout a quiet part to 92 dB throughout a loud part. In the order of how many times louder is the latter sound.
A car (m= 2740kg)is moving at a speed of35.6m/s on the highway .the driver notices slower traffic ahead andapplies the brakes . The car slows down to a speed of 17.2 m/s in adistance of 148m due to the combination of the brakes and theair resistan..
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