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The brightest star in the night skyis Sirius, which is at a distance of 8.30×1016 m.When we look at this star, how far back in time are we seeing it?Express your answer in years.
An object (3.7kg) is lifted 4.6 m above the ground and thendropped to the ground. What is the object's Pe at the top ofthe lift, How much work did gravity do on the object
A 7.80-g bullet moving at 550 m/s penetrates a tree trunk to a depth of 6.1 cm. Use work and energy considerations to find the average frictional force that stops the bullet
A physics student playing with an air hockey table (a frictionlesssurface) finds that if she gives the puck a velocity of 3.85 m/salong the length (1.78 m) of the table at one end, What is the angle of inclination
Next, a beaker of water is placed so that the iron block is submerged in the beaker not touching the bottom. What mass (in kg) is now necessary to balance the scales
a series rcl circuit includes a resistance of 281 an inductive reactance of 860 and a capacitive reactance of 606. the
1.research to find equations that would help you find g using a pendulum. design an experiment and test your design
A single force acts on a 4.4 kg particle-like object in such a way that the position of the object as a function of time is given by x = 3.8t - 4.6t2 + 1.3t3
A toy airplane is tied to the ceiling with a string. When the airplane's motor is started, it moves with a constant speed of 1.03m/s in a horizontal circle. If the angle the string makes with the vertical is 27°, and the tension of the string is 1N.
A certain orthodontist uses a wire brace to align a patient's crooked tooth as in the figure below. The tension in the wire is adjusted to have a magnitude of 21.1 N. Find the magnitude of the net force exerted by the wire on the crooked tooth.
Consider the Sun to be at the origin of an xy-coordinate system. A telescope spots an asteroid in the xy-plane at a position given (1.8xe11 meters, 2.9xe11 meters) with a velocity given (-9.7xe3 m/s, -6.8xe3 m/s). What will be the magnitude of the as..
Water has a mass per mole of 18.0 g/mol, and each water molecule (H2O) has 10 electrons. What is the net charge of all these electrons
A 117Kg (including all the contents) rocket has an engine that produces a constant vertical force (the thrust) of 1820N. When it has reached an altitude of 120m how hard does the floor push on the power supply
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