A block of wood is floating in water with 2/3 of its volume below the water line. The density of the wood is
A. equal to 3/2 the density of water
B. equal to 2/3 the density of water
C. equal to 1/3 the density of water
D. equal to the density of water since it is floating
B. equal to 2/3 the density of water
You might also like to view...
A softball player determines her pitching speed by throwing a ball horizontally from an elevation of 5 m above the ground. The ball lands 20 m downrange. What is her pitching speed?
A) 5 m/s B) 10 m/s C) 20 m/s D) 25 m/s E) none of the above
The density of the cosmos at the end of the lepton epoch was comparable to iron, about ten times denser than water
Indicate whether the statement is true or false
Light of the same wavelength passes through two diffraction gratings. One grating has 4000 lines/cm, and the other one has 6000 lines/cm. Which grating will spread the light through a larger angle in the first-order pattern?
A) the 4000-line grating B) the 6000-line grating C) Both gratings spread the light the same.
A child throws a ball with an initial speed of 8.00 m/s at an angle of 40.0° above the horizontal. The ball leaves her hand 1.00 m above the ground and experience negligible air resistance
(a) What is the magnitude of the ball's velocity just before it hits the ground? (b) At what angle below the horizontal does the ball approach the ground?