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A Styrofoam bucket of negligible mass contains 1.75 kg of water and 0.455 kg of ice. More ice, from a refrigerator at -16.0 °C, is added to the mixture in the bucket, and when thermal equilibrium has been reached, the total mass of ice in the bucket is 0.768 kg. Assuming no heat exchange with the surroundings, what mass of ice was added?
An automobile having a mass of 1,000 kg is driven into a brick wall in a safety test. The bumper behaves like a spring with constant 5.55 106 N/m, What was the speed of the car before impact
A singly ionized helium atom (He+) has only one electron in orbit about the nucleus. What is the radius of the ion when it is in the excited state defined with n=4?
A Ferris wheel rotating at 20 rad/s slows down with a constant angular acceleration of magnitude 5.0 rad/s2. Obtain how many revolutions does it make while slowing down before coming to rest
What mass (in grams) of steam at 100°C must be mixed with 251 g of ice at its melting point, in a thermally insulated container, to create liquid water at 66.0°C? The specific heat of water is 4186 J/kg·K. The latent heat of fusion is 333 kJ/kg, an..
What is the amplitude of this function. What is the spatial frequency of this function? What is the spatial period (wavelength) of this function?
a large pump supplies 0.585 cumecs at 620kpa downward into a 75 degree steel bend that expands from 300mm into a 450mm
a grindstone has a radius of 6.00 cm and rotates at 7000 rpm. What is the linear speed of a point on its edge
The rails are laid on a winter day when their temperature is 1.8°C. (a) How much space must be left between adjacent rails if they are just to touch on a summer day when their temperature is 32.2°C
q1. if work function 1.85 ev wavelength 410 nm what is stopping potential and maximum speed of photoelectrons emitted
An unknown substance has a mass of 0.125 kg and an initial temperature of 77.5°C. calculate the specific heat of the unknown substance
A laser beam enters a 1.00 cm thick glass block at an angle of 51° from the normal. The index of refraction of the glass is 1.46. At what angle from the normal does the beam travel during the glass?
How fast must you project an object for it to reach a height equal to the moon's distance from the earth? Ignore the gravitational attraction of the moon
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