Find the tension in the wire holding up
Find the tension in the wire holding up the 80 kg sign below (assume the 30kg pole is attached to the wall with a pivot)
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A tuning fork with a frequency of 356 Hz is found to cause resonance in a closed column of air at 41.0cm and at 65 cm. Find the velocity of the sound produced by the tuning fork.
A disk with radius 0.5 m is oriented with its normal unit vector n at an angle of 30° to a uniform electric field E with magnitude 2.0 × 103 N/C. What is the flux through the disk if it is normal is parallel to E?
One of the harmonics of a column of air open at one end and closed at the other has a frequency of 448 Hz and the next higher harmonic has a frequency of 576 Hz. The speed of sound in air is 343 m/s. a) What is the fundamental frequency?
Path A is 7.0 km long heading 60.0 degrees north of east.Path B is 6.0 km long in a direction due east. Path C is 5.0 km long heading 315 degrees counterclockwise from east. Graphically add the hikers displacements in the order A,B,C and give the
George is swinging on a playground swing. The length of the swing is l, and George's weight is W. At the bottom of the swing, George's speed is v=n1 meters/sec. The value of l times g is equal to lg = n2 (meters/sec)2. If the swing is held up by
A(n) 4.02 kg sphere makes a perfectly inelastic collision with a second sphere that is initially at rest. The composite system moves with a speed equal to one-third the original speed of the 4.02 kg sphere. What is the mass of the second sphere?
A container of hot water at 80 degrees Celsius cools to 79 degrees Celsius in 15 seconds when it is placed in a 20 degrees Celsius room. Use Newton's law of cooling to estimate the time it will take for the container to cool from 50 degrees Celsiu
Calculate the change in kinetic energy ΔT, potential energy ΔU, and total energy ΔE of the charge as it travels from one plate to the other. Assume the initial speed of the electron is 0.
A 2300 kg truck moves 30 m/s for 7.5 seconds and then coasts to a stop in 72 seconds. What is the trucks acceleration and deceleration?
A massive steel cable drags a 21.0 block across a horizontal, frictionless surface. A 90.0 force applied to the cable causes the block to reach a speed of 4.10 in 1.70. What is the difference in tension between the two ends of the cable?
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