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If a feather is dropped on the moon falls 81.7cm in one second,
(a) calculate the acceleration due to gravity on the moon, expressed in m/s/s.
(b) use dimensional analysis to convert this value to ft/s/s (1 meter=3.28 feet)
(c) based on your answer, use words to describe what would happenif you tripped andfell on the moon.
The threshold of dark-adapted (scotopic) vision is 8.0 ? 10-11 W/m2 at a central wavelength of 450 nm. how many photons per second enter the eye
In the figure below, the converging lens' focal length is 14.4 cm, d = 13.6 cm, and the diverging lens' focal length is -14.1 cm. Where is the image formed by the converging lens,
To save on heating costs, the owner of a greenhouse keeps 580 kg of water around in barrels. What is the minimum ampere rating of an electric heating system
what is the maximum head-start distance the speeder can have? Measure time from the moment the police car starts.
A coffee filter of mass 1.1 grams dropped from a height of 1 m reaches the ground with a speed of 0.5 m/s. How much kinetic energy Kair did the air molecules gain from the falling coffee filter? Start from the Energy Principle and select as system..
An inductor that has an inductance of 15.0 H and resistance of 30.0 W is connected across a 100-V battery. Calculate the rate of increase of the current
Rank the voltage across each cylinder. A baseball is seen to pass upward by a window 15 m above the street with a vertical speed of 18 m/s. imagine the ball was thrown from the street. What was it's initial speed.
What is the difference in blood pressure ({rm mm-Hg}) between the top of the head and bottom of the feet of a 1.80-{rm m}-tall person standing vertically.
What is the value of the composite constant (Gmer2e), to be multiplied by the mass of the object mo in the equation above
Two stars in a binary system orbit around their center of mass. The centers of the two stars are 7.53x1011 m apart. What is the mass of the smaller star
A pulley system is used to lift a piano 3.4 m. The acceleration of gravity is 9.81 m/s2 . If a force of 2315 N is applied to the rope as the rope is pulled in 17 m, what is the efficiency of the machine
Although both stars probably formed from the same clump of gas, more massive one must have had its birth slowed so that it became a key -sequence star millions of years later than its less massive companion.
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