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A layer of ice has formed on a small pond. The air just above theice is at -5.99 °C, the water-ice interface is at 0 °C, andthe water at the bottom of the pond is at 4.03 °C. Ifthe total depth from the top of the ice to the bottom of the pondis 1.21 m, how thick is the layer of ice? Note:The thermal conductivity of ice is 1.60 W/(m*°C) and that ofwater is 0.600 W/(m*°C).
A slit of width 0.19mm is illuminated with monochromatic light of wavelength 632.8 nm. At what angle will the first minimum occur
A 10.0-g bullet traveling horizontally at 755 m/s strikes a stationary target and stops after penetrating 14.5 cm into the target. What is the average force of the target on the bullet
A basketball player grabbing a rebound jumps 70 cm vertically. How much total time (ascent and descent) does the player spend (a) in the top 11.9 cm of this jump and (b) in the bottom 11.9 cm.
Calculate the per capita energy use for China and India. The populations of each country should be obtained from reliable sources. Express your final answer in units of kcal per day per person.
A string is attached to the center of a solid cylinder. The cylinder sits on a horizontal surface made of concrete and rolls without slipping. find the magnitude of the static friction acting on the cylinder
Two skaters, one with mass 65 kg and the other with mass 80 kg, stand on an ice rink holding a pole of length 9 m and negligible mass. How far does the 80 kg skater move
A long straight wire carries a current of 6.2 A. The wire is horizontal in the plane of the page (screen), Calculate the force that acts on the electron
calculate the speed of the block at the instant the dielectric leaves the capacitor assuming it starts at rest and that the voltage across the capacitor after the dielectric is removed is measured to be 900 V.
The position of a particle moving along an x axis is given by x = 17t2 - 6.0t3, What is the maximum positive coordinate reached by the particle
A movie camera with a (single) lens of focal length 70 mm takes a picture of a person standing 29 m away. what is the height of the image in millimeters on the film
As an electron in a cold hydrogen atom "flips" to align its magnetic moment with the B-field that surrounds its proton, Calculate the frequency and energy of this photon
two blocks are connected by a horizontal rope. block 1 has a mass of 20kg and block 2 has a mass of 12kg. determine the acceleration of each block
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