Assuming no change in temperature, as a freely expanding helium-filled balloon rises in the atmosphere, the buoyant force acting on it
A) increases.
B) decreases.
C) remains nearly the same.
Answer: C
You might also like to view...
On April 8, 2005, observers off New Zealand observe an annular eclipse at sunrise, and those in Columbia see an annular eclipse at sunset
Yet in the middle of the path, off the Galapagos Islands, cruise ships are advertising that they will show their guests a total solar eclipse. How can this be possible?
If we allow for moisture loss due to a moist greenhouse effect, the inner boundary of the Sun's habitable zone would be
A) just inside the orbit of the Earth B) roughly halfway between the orbits of Venus and Mercury C) roughly halfway between the orbits of the Earth and Venus D) just outside the orbit of the planet Mercury
The acceleration of a ball as it rolls down a ramp is 4 m/s2 . The ball is referred to 2 s after it starts to roll. The velocity acquired after starting from rest is __________
Fill in the blank(s) with correct word
Consider two identical and symmetrical wave pulses on a string. Suppose the first pulse reaches the fixed end of the string and is reflected back and then meets the second pulse. When the two pulses overlap exactly, the superposition principle predicts that the amplitude of the resultant pulses, at that moment, will be what factor times the amplitude of one of the original pulses?
a. 0 c. 2 b. 1 d. 4