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In the figure, a block of mass m = 12 kg is released from rest on a frictionless incline of angle ? = 26°. Below the block is a spring that can be compressed 2.8 cm by a force of 330 N. The block momentarily stops when it compresses the spring by 6.9 cm. (a) How far does the block move down the incline from its rest position to this stopping point? (b) What is the speed of the block just as it touches the spring?
A compressed-air cylinder is known to fail if the pressue exceeds 100 atm. What is the pressure inside the cylinder during the fire
Light of wavelength 4.80 102 nm illuminates a pair of slits separated by 0.270 mm. find the distance between the first and second dark fringes
A 195 W (121 V) night light is turned on for an average 6.5 hr a day year round. What is the annual cost of electricity at a billing rate of $0.07 per kWh
A vertical spring has one end attached to the ceiling and a 2.50 kg weight attached to the other one. find how fast the weight is moving
q1. a 52.0 skateboarder wants to just make it to the upper edge of a quarter pipe a track that is one-quarter of a
A cafeteria tray dispenser supports a stack of trays on a shelf hangs from four identical spiral springs under tension, one near each corner of the shelf. Each tray is rectangular, 45.3 cm by 35.6cm, 0.450 cm thick, and with mass 580g. Demonstrate..
The 9 inch long elephant nose fish in the Congo River generates a weak electric field around its body using an organ in its tail. How many electrons would be required to create that charge
You decrease the angular speed of the cylinder from 4:0 rad/s to 2:0 rad/s in 20:0 revoluations at constant angular acceleration. What is the angular acceleration during this decrease
A student wants to determine the coefficients of static friction and kinetic friction between a box and a plank. What is the coefficient of static friction
A 31 μF capacitor is connected across a programmed power supply. find the power output from the power supply
If a helium nucleus with a mass of 6.68 10-27 kg, a charge of +2e, how close will the helium atom come to the gold nucleus before it stops and turns around
A uniform rod of mass 3.35×10?2kg and length 0.430m rotates in a horizontal plane about a fixed axis through its center, What is the angular speed of the rod after the rings leave it
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