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In a house the temperature at the surface of a window is 23°C. The temperature outside at the window surface is 6°C. Heat is lost during the window via conduction, and the heat lost per second has a certain value. The temperature outside begins to fall, while the conditions inside the house remain the same. As a result the heat lost per second increases. What is the temperature at the outside window surface when the heat lost per second doubles?
4.0kg of water at 30 C is mixed with 4.0 kg of water at 47 C in a well-insulated container. Estimate the net change in entropy of the system.
A rock is on a slope at an angle of 34.5degree, with respect to the horizontal. The mass of the rock is32.7 kg. What is the acceleration of the rock down the slope
a bobsled slides down an ice track starting at zero initial speed from the top of an 44.9 m high hill. the acceleration
For the known values of the Earth such that RE = 6.37×106m and ME = 5.97×1024kg, find the height that the satellite is orbiting above the surface
an electron is released from rest at the negative plate of a parallel plate capacitor and accelerates to the positive plate, What is the kinetic energy of the electron just as it reaches the positive plate
A can of sardines is made to move along an x axis from x = 0.36 m to x = 1.40 m by a force with a magnitude given by F = exp(-4x), How much work is done on the can by the force
a submerged scuba diver looks up towards the calm surface of a freshwater lake and notes that the sun appears to be 35
A helium-neon laser of = 633 illuminates a diffraction grating. The distance between the two m= 1 bright fringes is 36.0 cm on a screen 2.40 m behind the grating. What is the spacing between slits of the grating
Long parallel wires separated by 7.5 cm carry 3.3 Amperes each in opposite directions. What magnetic force per length acts on the wires
A sound wave of frequency 1840 Hz., propagating through air at 0 degrees Celsius, has a pressure amplitude of 15.0 Pa. What is the maximum particle speed
Find the change in the force of gravity between two planets when the distance between them is decreased by eight
Two wires are identical, except that one is aluminum and one is nichrome. The aluminum wire has a resistance of 0.16 . What is the resistance of the nichrome wire
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