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When four persons with a combined mass of 300 kilogram sit down in a van, they find that the van drops 0.50 centimeter lower on its springs. Then they get out of the car and bounce it up and down. Find the frequency of the van vibration if its mass (when it is empty) is 2.0 x 103 kilogram? Hz
Suppose a manufacturing plant has an average sound intensity level of 97.0 dB created by 25 identical machines. Find the total intensity created by all the machines
bob walks 390m south then jogs 660m southwest then walks 390m in a direction 35circ east of north. a find the
What is the speed of the block while the spring is till now compressed by xf=0.14m.
It takes 1.4×106J of heat to bring a quantity of water from 14 ? C to a boil. What is the mass of the Water
A particle that has an 6.4-?C charge moves with a velocity of magnitude 4 × 105 m/s along the +x axis. It experiences no magnetic force, although there is a magnetic field present.
A concave mirror has a focal length of 32.5 centimeter. The distance between an object and its image is 46.3 centimeter. determine the image and object distance
Two radio antennas are separated by 2.0 m. Both broadcast identical 750 MHz waves. If you walk around the antennas in a circle of radius 10 m, how many maxima will you detect?
A sticky hockey puck slides along a frictionless horizontal ice surface at 75m/s in the + x-direction. what is the angle of their final velocity vector below the +x direction
A 0.58 kg toy airplane is suspended from the ceiling by a 1.6 m cord and rotates in a horizontal circle, Find the speed of the plane, Find the tension in the cord
Two identical point charges (q = +1.50 x 10-6 C) are fixed at opposite corners of a square whose sides have a length of 0.570 m. Determine the speed of the test charge when it reaches the center of the square
A closed system is observed to have 47 objects in it. Initially, the total energy of the system is 897 J. After 5.1 h have passed, how much total energy will the system contain
A stone is dropped from rest from the roof of a 100-m high building; 2.00 s after that, a second stone is thrown straight down with initial speed v0, and the second stone passes the first stone 21.6 m above ground. What are the speeds of the two s..
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