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In a house the temperature at the surface of a window is 22.3 °C. The temperature outside at the window surface is 2.74 °C. Heat is lost through 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 in degrees Celsius at the outside window surface when the heat lost per second doubles?
A 60 kg man is ice skating due north with a velocity of 6.0 m/s when he collides with a 38 kg child. What are the magnitude and direction of the child just before the collision
A package is dropped from a helicopter that is ascending at a steady speed of 12 m/s. How long will the package spend in the air
A piece of iron of mass 200g at temperature 80 degrees C is added to a 300g of water at temp 10 degrees C. What is the final temperature of the system?
a pair of oppositely charged parallel plates are separated by 5.25 mm. a potential difference of 600 v exists between
an iron boiler of mass 230 kg contains 900 kg of water at 23degc. a heater supplies energy at the rate of 51500 kjh.how
A telescope can be used to enlarge the diameter of a laser beam and limit diffraction spreading. what is the size of the spot this beam would make on the moon
The wave the tamer creates in the whip has an amplitude of 0.086 m, a wavelength of 0.071 m, and a speed of 97 m/s. How much power does the wave transmit? The answer in W.
A 1,699-kg satellite orbits the Earth in a circular orbit with a period of 6,016 s. How high above the Earth's surface is the satellite's orbit
two boxes connected by a light horizontal rope are on a horizontal surface. the coefficient of kinetic friction between
a softball having a mass of 0.40 kg is pitched horizontally at 120kmh . by the time it reaches the plate it may have
A double convex lens has equal curvature radii of 35 cm. What is the refrative index of the lens
In the computer-based experiment concerning rotational motion, the acceleration of a point on the rim of the large steel disk, is 8.0 cm/s2. What is the angular acceleration of the pulley
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