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a) A sidewalk is to be constructed around a swimming pool that measures (10.0 ± 0.1) m by (17.0 ± 0.1) m. If the sidewalk is to measure (1.00 ± 0.01) m wide by (9.0 ± 0.1) cm thick, what volume of concrete is needed, and what is the approximate uncertainty of this volume?
b) A child throws vertically a pebble into the air with initial speed vi. Another child drops a ball at the same instant. Compare the accelerations of the two objects while they are in flight.
c) Is it possible for the velocity and the acceleration of an object to have opposite signs? If not, state a proof. If so, give an example of such a situation and sketch a velocity vs. time graph to prove your point.
If an object is moving with constant momentum ‹ 8, ?14, ?4 › kg · m/s, What is the net force acting on the object
Briefly describe how the resulting interference pattern will differ for the various types of particles passing through: protons, electrons, neutrinos (mass close to zero) and photons. Assume that the distribution of particle energies is the same f..
Suppose your body was able to use the chemical energy in gasoline. How far could you pedal a bicycle at 15 km/hr on the energy in 2.0 gal of gas? ( 1 gal of gas has a mass of 3.2 kg )
An elevator at the CN Tower in Toronto, Canada, is able to lift 2000 kg (including the load and the car) to a height of 350 m in 60.0 s. find the minimal power required for the motor of the elevator
A thermos contains 170 cm3 of coffee at 85° C. To cool the coffee, you drop two 14-g ice cubes into the thermos. What is the final temperature of the coffee
A 1200 kg car carrying four 84 kg people travels over a rough washboard dirt road with corrugations 4m apart which causes the car to bounce on its spring suspension.
Gas is confined in a tank at a pressure of 11.7 atm and a temperature of 30.0°C. If two-thirds of the gas is withdrawn and the temperature is raised to 77.0°C, what is the pressure of the gas remaining in the tank? atm
A thin rod of length 0.84 m and mass 190 g is suspended freely from one end. find how far above that position the center of mass rises
A flywheel in a motor is spinning at 530 rpm when a power failure suddenly occurs. The flywheel has mass 40.0kg and diameter 75.0cm. how many revolutions would the wheel have made during this time
A steel tank contains 301 g of ammonia gas (NH3) at a pressure of 1.35 ? 106 Pa and temperature of 71°C. What is the volume of the tank
An arrow is placed 28.7 cm in front of a convex lens (f=15.0 cm). The convex lens is followed by a concave lens (f= 21.5 cm) 12.8 cm fro the convex lens. obtain the magnification of the image
A parallel-plate capacitor has square plates of edge length 2.4 cm and a plate spacing of 0.017 mm. If the gap between the plates is a vacuum
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