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eight bricks, each 6.0 cm thick with mass 1.5 kg lie flat on a table. how much work is required to stack them one on top of another?
A sealed glass bottle at 27°C contains air at atmospheric pressure and has a volume of 30 mL. It is then tossed into an open fire. When the temperature of the air in the bottle reaches 200°C,
A train sounds its horn as it approaches an intersection. The horn can just be heard at a level of 54 dB by an observer 10 km away. What is the average power generated by the horn
A person wearing a seat belt can withstand an acceleration of -3.0 x 10^2 m/s^2. Explain how thick should barriers be to safely stop a car that hits a barrier at 110 km/h?
A visual binary system is at a distance of 5.0 pc. The distance between the two stars subtends an angle of 4.5 arcseconds. What is the mass of each of the stars
A helicopter, starting from rest, accelerates straight up from the roof of a hospital. The lifting force does work in raising the helicopter. What is the average power generated by the lifting force
A 0.500 kg stone is moving in a vertical circular path attached to a string that is 75.0 cm long. find The magnitude and direction of the velocity of the stone
An eagle is flying horizontally at 4.8 m/s with a fish in its claws. It accidentally drops the fish. How much time passes before the fish's speed doubles
The velocity of the wave traveling on a string is higher if you increase the length of the string (keeping the kind of string, and the tension of the string, unchanged)
The vibration of an o2 molecule has a wavenumber of 1580.4 cm^-1 Calculate the energy (in joules) of the first excited state?
A plane of a 5.0 cm x 8.0 cm rectangular loop of wire is parallel to a 0.19 T magnetic field. The loop carries a current of 6.2 A. What is the magnetic moment of the loop
Determine how many times greater heat loss occurs through a glass window thats 80.0 cm high, 70 cm wide, and 0.300 cm thick (k = 0.791 W/m°C) than a electrical supply line running outside to an exterior mounted light.
A box is sliding up an incline that makes an angle of 27.7 ° regarding the horizontal. The coefficient of kinetic friction between the box and the surface of the incline is 0.113. The initial speed of the box at the bottom of the incline is 2.27 m/s...
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