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1. A canoe can carry a maximum load of 700 kg. The canoe itself has a mass of 37 kg. The canoe is floating in a lake. What volume of the canoe is under water if the canoe is carrying its maximum load?
2. You put a pot containing 3 quarts of soup at 95 °C on a folded dishtowel to cool. The countertop under the dishtowel is at 22 °C. 5 minutes later, the temperature of the spaghetti sauce is 89 °C. The dishtowel is inch thick when folded. The pot has a diameter of 8 inches. Calculate the thermal conductivity of the dishtowel. Assume the soup has the same specific heat as water. Ignore the effects of radiation.
3. A serving of pasta with sauce contains 60 g of carbohydrates, 13 g of fat, and 14 g of protein. "Burning" 1 g of protein releases 17 kJ of energy.
a. Calculate the energy contained in the pasta.
b. A 90 kg football player eats the pasta and goes to work out. They run up the stadium steps, reaching a maximum height of 15 m. How many times could they run up the steps on the energy contained in the pasta if their body's efficiency is 25%?
A point source of source emits a tone with a power of 45 W that has a frequency of 429 Hz. calculate the pressure amplitude in Pascals of the sound
One runner ran the 100-m dash in 11.9 s. Another runner came in secona at 12.4 s. Assuming that the runners traveled at their average speeds for the entire distance, determine the sepaaration between the two runners when the winner crossed the fin..
an other frame moves with a speed of 0.95 relative to the home frame. an object at rest in the other frame has a length
A Camera flash circuit (being used for a coil gun) with a capacitance of .180 mF is charged to a voltage of 330 volts. Calculate the energy stored in it. What resistance should be put in series with the capacitance to limit the discharging current..
A solid prism has a vertical rectangular face of height H= .90 m by width W=.5 m and a horizontal rectangular face of length L= 1.2 m, with W=.5 m also. The prism is submerged in liquid whose density is D= 1600 kg/m^3 with the horizontal face at d..
q1. a 3.988x10-26 kg mass particle with negative -1.44x10-18 c charge is initially moving at 50ms parallel to a wire
Hydroelectric power plants convert gravitational potential energy into more useful forms with flowing water downhill during a turbine system to generate electric energy. The Hoover Dam on the Colorado River is 211 m high and generates 4.00 x109 kW · ..
what is the final equilibrium temperature of the system?
A meat baster consists of a squeeze bulb attached to a plastic tube. When the bulb is released and squeezed, with the open end of the tube under the surface of the basting sauce, the sauce rises in the tube to a distance h, as the drawing shows.
a rocket rises vertically from rest with an acceleration of 3.2 ms2 until it runs out of fuel at an altitude of 870 m.
When you hit a baseball with a bat, the bat flexes and then vibrates. We can model this vibration as a transverse standing wave. Estimate the approximate distance of the sweet spot (as a fraction of the bat's length L ) from the end of the bat
The coefficient of kinetic friction between the floor and a suitcase is 0.272. determine how far can it be pushed across the level floor with 642 J of work
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