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A yo-yo is made of two solid cylindrical disks, each of mass 0.049kg and diameter 0.074m , joined by a (concentric) thin solid cylindrical hub of mass 0.0053kg and diameter 0.010m . Use conservation of energy to calculate the linear speed of the yo-yo when it reaches the end of its 0.90m long string, if it is released from rest in m/s. What fraction of its kinetic energy is rotational?
An 800kHz radio signal is detected at a point 6.6 kmdistant from a transmitter tower. The electric field amplitude of the signal at that point is 780mV/m. What is the magnetic field amplitude of the signal at that point
You have a 77.7-cm-long copper rod with a rectangular cross section of dimensions 5.75 cm by 8.13 cm. Find the heat current through the rod
With the switch in position A, the capacitor becomes charged. After a long time, the capacitor charge approaches q = C ?. Determine the energy of the capacitor U(t) as a function of time t
A 12.6 V battery is in a circuit with a 30.0 mH inductor and a 0.150 resistor, as in Active Figure 20.27. The switch is closed at t = 0. Find the current after one time constant has elapsed
A soccer player kicks the ball toward a goal that is 27.0 m in front of him. Find the speed of the ball when the goalie catches it in front of the net
A ball starts at a point 30 m above the bottom of a dip with of 25 m/s. overlook friction, what will be the speed of the ball at the top of the next slope, which is 45 m above the bottom of the dip.
A rifle is aimed horizontally at a target 1,234.37 m away. What is the bullet's time of flight
A circular wire loop of radius 14.1 cm carries a current of 2.51 A. What is the magnitude of the torque acting on the loop
A civil engineer wishes to plan a curved exit ramp for a highway in a way that a car will not have to rely on friction to round the curve without skidding. In the other words, a car moving at the designated speed can negotiate the curve even while th..
Why must a thermom be calibrated? You have a glass bulb thermom with no markings on it, and a second one marked in degrees Celsius. Describe how you would calibrate the unmarked thermom.
find the energy in joules of the photons.
The density of Muriatic acid is 1200 kg per cubic meter. Calculate its specific gravity
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