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A 5.27-kg object passes through the origin at time t = 0 such that its x component of velocity is 4.95 m/s and its y component of velocity is -3.03 m/s. (a) What is the kinetic energy of the object at this time? J (b) At a later time t = 2.00 s, the particle is located at x = 8.50 m and y = 5.00 m. What constant force acted on the object during this time interval? magnitude (c) What is the speed of the particle at t = 2.00 s? m/s
Two musicians are playing two pieces of the same instrument so that the sound produced by the first musician has a frequency of 1 kHz, What is this frequency called
A tank holds a 1.44-m thick layer of oil that floats on a 0.96-m thick layer of brine. Both liquids are clear and do not intermix. what is the angle that the ray in the air makes with the vertical
A bat strikes 0.150 kg baseball. Just before impact, the ball is traveling horizontally to the right at 50.5 m/s , find the vertical component of the average force on the ball
If the polar coordinates of the point ( x , y ) are ( r , ? ), determine the polar coordinates for the following points
Consider a circuit consisting of a lightbulb and a capacitor. Part A:If the frequency of the generator is increased, does the intensity of the lightbulb increase, decrease, or stay the same? Part B:Choose the bestexplanation from among the following:
A 3.5-kg block of iron (c=0.11 kcal/kgoC) that has been brought to a temperature of 1,063oC is placed on top of a 2.5-kg block of ice (c=0.5 kcal/kgoC) that has been cooled to -50oC
A 36.0 g bullet moving at 478 m/s strikes a 3.7 kg bag of flour that is on ice, at rest. The bullet passes during the bag, leaving at 255 m/s. How fast is the bag moving when the bullet exits.
What are memory tricks, and explain in theoretical terms why they work?
A dockworker applies a constant horizontal force of 88.0N to a block of ice on a smooth horizontal floor. The frictional force is negligible. What is the mass of the block of ice
A spherically symmetric electromagnetic wave is emitted by a 1030 W source. What is the rms value of the electric field at that distance
Three point charges are arranged along the x axis. Charge q1=-4 nC is located at x=0.240m and charge q2=2.10 nC is at x=-0.350m, What is the direction of the net force on q3
A composite bar oflength L = L1 + L2 is made from a bar of material 1 and length L1 attached to a bar of material 2, Show that the coefficient of linear expansion
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