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Dorothy is up on her 16.0m by 15.0m roof enjoying the view of Kansas. Suddenly, a strong wind blows down her ladder, leaving her stranded. She knows that a high wind reduces the air pressure on the roof, and that there is a danger that the atmospheric pressure inside the house will blow the roof off. As the wind reaches a speed of 37.5m/s, she calls to her Auntie Em for help. Calculate the force on the roof.
When a diver jumps into the ocean, water leaks into the gap region between the diver's skin and her wetsuit, estimate how much energy (in units of candy bars = 300 kcal) is required by this heating process
The source of a sound wave has a power of 1.60 µW. Assume it is a point source. What is the sound level at that distance
Light in a vacuum is incident on a transparent glass slab. The angle of incidence is 38.8°. What is the index of refraction of the liquid
Consider a 10-kg block resting on a frictionless plane inclined 30 o connected by a rope through a pulley to a 10-kg block hanging free. What is the direction and magnitude of the resulting acceleration of the 2-block system?
While looking into a silver Christmas ornament, If your nose is only 6.25 inches from the ornament, and the diameter of the ornament is 4.85 cm, how far behind the ornament does your nose appear
What was the temperature of the water before the insertion of the thermometer.
A dense rubber buoy is attached to a lead weight when it is accidentally lost overboard from an ocean going vessel. The density of the buoy at the surface was 661 kg/m^3.
A small insect is placed 7.90cm from a +8.00%u2212cm -focal-length lens. Calculate the position of the image
What is the maximum temperature and what is the (air-standard) thermal effiency?
Consider a group of 20 molecules with the following speeds: three have speed 1 m/s, Determine the rms speed (in m/s) of the molecules in this group at this instant in time
a record is turning at the rate of 33 r.p.m. when the 45 r.p.m. button is pressed. what is the angular acclereration of the record
A metal block of mass m slides on a horizontal surface that has been lubricated with a heavy oil so that the block suffers a viscous resistance that varies as the 3/2 power of the speed F(v)=-cv^3/2. If the initial speed of the block is v0 at x=0,..
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