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At a carnival, you can try to ring a bell by striking a target with a 7.15-kg hammer. In response, a 0.411-kg metal piece is sent upward toward the bell, which is 5.43 m above. Suppose that 33.8 percent of the hammer's kinetic energy is used to do the work of sending the metal piece upward. How fast must the hammer be moving when it strikes the target so that the bell just barely rings?
q1. three capacitors are arranged as shown. c1 has the capacitance of 9 pf c2 has a capacitance of 18 pf and c3 has a
An 7.00 foot extension cord has two 18 measure copper wires, each with a diameter of 1.400 mm. At what rate is energy delivered to the resistance in the cord when it is carrying a current of 1.00 A? W. At what rate is energy delivered to the resistan..
A certain string just breaks when it is under 400N of tension. At approximately what speed will the string break
the magnitude of the net electric field. A lead ball is dropped into a lake from a diving board 6.40 above the water. After entering the water, it sinks to the bottom with a constant velocity equal to the velocity with which it hit the water.
The position of an object connected to a spring varies with time according to the expression x = (4.8 cm) sin(9.3 ?t). Find the amplitude of the motion
A 9kg object is suspended from the ceiling by a strong spring, which then undergoes simple harmonic motion with a period of 0.4s. The block is brought to rest, and the equilibrium length of the spring with the block attached is measured. By how mu..
There is a uniform magnetic field present, given by B=0.003 i + 0.004 j + 0.002 k, where i,j,k are the unit vectors along the cartesian coordinate axes in units of Tesla. Compute the y-component of the magnetic force acting on a segment of wire of..
A long solenoid with 10.0 turns/cm and a radius of 7.00 cm carries a current of 20.0 mA. What is the magnitude of the magnetic field there
A real battery is not just an emf. We can model a real 1.5v battery as a 1.5v emf in series with a resistor known as the "internal resistance", What is the potential difference between the terminals of the battery
An astronaut is being tested in a centrifuge. The centrifuge has a radius of 9.6 m and, in starting, rotates according to ? = 0.34t^2, find the magnitudes of the astronaut's angular velocity
A jet plane lands with a speed of 98 m/s and can accelerate at a maximum rate of 5.90 m/s2 as it comes to rest. (a) From the instant the plane touches the runway.
An electron is moving speed 0.78c opposite of a moving proton. Determine relative velocity of electron with respect to proton
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