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The concrete wall of a building is 0.0972 meter thick. The temperature inside the building is 17.8 °C, while the temperature outside is 0.0 °C. Heat is conducted through the wall. The outside of the wall loses the energy only due to radiation. Determine what is the emissivity of the wall?
Four point charges have the same magnitude of 2.4 x ten-12C and are fixed to the corners of a square 4.0 cm on a side. Three of the charges are positive and one is negative. Determine the magnitude of the net electric field that exists at the ce..
For the transmutation reaction 1H + 93Y -> ___ + 4He, What is the element abbreviation of the daughter atom
A stick of mass m and length L spins with frequency w around an axis, What is the tension in the string, and what is the force that the pivot applies to the stick
An 7.17 kg block drops straight down from a height of 1.21 m, Find the maximum compression of the spring
A pair of flat mirrors meet to form a right angle. A beam of light is incident on one of them at a point 11.5 cm from their point of intersection, what is the angle of incidence at the first mirror
Some air is flowing from a wider tube to narrower. There is a difference in height of the liquid in the two sides of the U-shaped tube. Why is there such a difference in height.
A sideshow barker claims that the star of the show can throw a 7.3 kilogram Olympic-style hammer faster than a speeding bullet. Find when the hammer flies off is it really moving faster than a bullet
What is the speed of the bullet.
A 31.2cm diameter coil consists of 17 turns of circular copper wire 1.70mm in diameter. The resistivity of copper is 1.68×10-8 Ohm m. Determine the current in the loop
A volleyball is spiked so that it has an initial velocity of 17.4 m/s directed downward at an angle of 48.8 ° below the horizontal. What is the horizontal component of the ball's velocity
Consider a 1.0 g sample of carbon with 14C / 12C of 1.3 x 10-12. What is the activity of the sample
The two identical pucks with masses of 300.0 g, in the figure rotate together on a frictionless, horizontal table. What is the tension in the second string
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