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It takes 25 turns to drive a screw completely into a block of wood. Because the friction force between the wood and the screw is proportional to the contact area between the wood and the screw, the torque required for turning the screw increases linearly with the depth that the screw has penetrated into the wood. If the maximum torque is 15 N m when the screw is completely in the wood, what is the total work (in J) required to drive in the screw?
Four identical springs support equally tghe weight of a 1300 kg car. the car driver goes over a speed bump, find the oscillation period
Assume all angles to be exact. A certain crystal gives a deflection angle of 25 degree for the first-order maximum of monochromatic X-rays with a frequency of 4.5×10^17
The magnetic field between the poles of an electromagnet is 2.17 T. A coil of wire is placed in this region so that the field is parallel to the axis of the coil. How many turns are there in the coil
It has been claimed that an insect called the froghopper (Philaenus spumarius) is the best jumper in the animal kingdom. How long did it take to reach that velocity
A child pulls on a wagon handle at an angle 37° above the horizontal with a force of 45 N. what is the mass of the wagon
The drawing shows a rectangular block of glass (n = 1.52) surrounded by a liquid with n = 1.73. At what angle does the ray leave the glass at point B
1. the ground state ofnbsp has jpi 32-1 the first excited state at 67.4 kev has jpi 12-1 and the second excited state
Two tugboats pull a disabled supertanker. Each tug exerts a constant force of 1.8×106 one at an angle 17 degrees west of north, What is the total work they do on the supertanker
A gardener opens a hose and water is ejected horizontally at the speed of 6m/s. The diameter of the hose is 2cm and the density of water is 1000kg/m^3.
Describe the components in the atom. Indicate the charge on each of the species and their location
The radius of the circle traced out by the second hand on a clock is 6.00 cm. Determine the value of t in seconds
Scientists want to place a 4200 kg satellite in orbit around Mars. What is the force of attraction between Mars and the satellite
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