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A 20.0-N block rests on a horizontal surface. The coefficients of static and kinetic friction between the surface and the block are 0.860 and 0.590, respectively. A horizontal string is attached to the block and a constant tension is maintained in the string. What is the force of friction acting on the block if the tension is 21.20 N?
A 30 N block is pulled along a horizontal surface by a 10 N force parallel to the surface. evaluate the coeffient of kinetic friction
A 128-cm-long pipe is stopped at one end. Near the open end, there is a loudspeaker that is driven by an audio oscillator, What is the lowest frequency of the oscillator that will produce resonance within the tube
The electric field midway between two equal but opposite point charges is 939N/, What is the direction of the electric field, Calculate the magnitude of the electric field
On the planet Zardem, the standard unit of time is the Zarsec, or Zs, where 1 Zs = 2.2s. how fast is the runner traveling
a ball is thrown vertically upward with a speed of 25m/s, how long does it take to reach its highest point
A projectile is launched with a launch angle of 65° with respect to the horizontal direction and with initial speed 14 m/s. what launch angle produces the longest time of flight
In a typical game of squash, two people hit a soft rubber ball at a wall until they are about to drop due to dehydration and exhaustion. What will be the temperature increase of the ball after one bounce
What is magnitude of the change in the magnetic field
A parallel plate capacitor has plates of area 2.0*10^3 and plate separation 1.0*10^4m. find the capacitance of this system if air fills the volume between the plates.
What is the resistance of the wire in the blanket? Express your answer to two significant figures and include the appropriate units. How much current does the wire carry
Two resistors, of R1 = 2.07 ? and R2 = 6.97 ?, are connected in series to a battery with an EMF of 24.0 V, Find the current I1 through the first resistor
One displacement vector A has magnitude of 2.78 km and point due north. Another displacement vector B has a magnitude of 7.40 km and also points due north. Provide diagrams and calculate the magnitude and direction of A+B, B-A, A-B.
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