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A copper ball with a radius of 1.6cm is heated until its diameter has increased by 0.17mm. Assuming an initial temperature of 23?C, find the final temperature of the ball.
A certain star is 14 million light-years from Earth. The intensity of the light that reaches Earth from the star is 4.00 x 10-21 W/m2. At what rate does the star radiate EM energy.
What are the displacement and velocity of the point on the cord. What is the magnitude of the acceleration of one of the liners toward the other because of their mutual gravitational attraction.
Two point charges Q1 = -25 micro Coulombs and Q2 = +50 micro Coulombs, are separated by a distance of 12 cm. The electric field at the point P is zero. How far from Q1 is P?
How would you describe why we have different atmospheric pressure on different level (height) of earth's atmosphere in molecular level (molecular behaviour and what causes such behaviour).
What is eccentricity of the transfer ellipse
A point charge with charge q1 is held stationary at the origin. A second point charge q2 with charge moves from the point (x1, 0) to the point (x2,y2 ). How much work is done by the electrostatic force on the moving point charge? Express your answ..
What was an initial speed of the ball
At a grinding wheel has an angular velocity of 27. It has a constant angular acceleration of 26.0 until a circuit breaker trips at time = 1.60 . From then on, it turns through an angle 433 as it coasts to a stop at constant angular acceleration.
Two objects are maintained at constant temperatures, one hot and one cold. Two identical bars can be attached end to end, as in part a of drawing, or one on top of the other, as in part b. When either of these arrangements is placed between the hot a..
Two point charges 2.0cm apart have an electric potential energy -400?J . The total charge is 25nC, What is the lesser and larger charge
A heavy piece of machinery is raised by sliding it a distance d = 15.0 m along a plank oriented at angle ? = 30° to the horizontal, How far is it moved vertically and horizontally
A small steel ball with a mass of 80 g is releasesd from a resting height of 1.25 m above a ridgid metal plate. What is the velocity of ball before impact.
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