Buoyancy: A wooden raft has a mass of 55 kg. When empty it floats in water (density 1000 kg/m3) with 64% of its volume submerged. What maximum mass of sand can be put on the raft without sinking it?
Fill in the blank(s) with the appropriate word(s).
31 kg
You might also like to view...
In the past, Earth has been hit by many asteroids, some very large. Suppose one such asteroid approached Earth so that when it was very far away it was traveling at 6500 m/s along a line that would miss the center of Earth by 8,500,000 m
Because of the gravitational attraction of Earth, it departed from this straight line and curved towards Earth, colliding with it. What was the speed of this asteroid when it hit Earth if we ignore the effect of the sun? The mass of Earth is 5.97 × 1024 kg, its radius is 6.38 × 106 m, and G = 6.67 × 10-11 N ? m2/kg2. A) 11400 m/s B) 12900 m/s C) 13700 m/s D) 15800 m/s E) 16400 m/s
The best determination of the Hubble constant using Cepheid variables found in distant galaxies by the Hubble telescope suggests
a. that the Hubble constant is about 0.07 km/sec/Mpc. b. that the Hubble constant is about 7 km/sec/Mpc. c. that the Hubble constant is about 70 km/sec/Mpc. d. that the Hubble constant is about 700 km/sec/Mpc.
According to our theory of solar system formation, what are asteroids and comets?
A) the shattered remains of collisions between planets B) chunks of rock or ice that condensed after the planets and moons finished forming C) chunks of rock or ice that were expelled from planets by volcanoes D) leftover planetesimals that never accreted into planets
Terminal Voltage and Internal Resistance: You buy a AA battery in the store, and it is marked 1.5 V. If this marking is strictly accurate, while this battery is fresh
A. its terminal voltage will be more than 1.5 V when it is used in a circuit. B. its terminal voltage will be less than 1.5 V when it is used in a circuit. C. its terminal voltage will be 1.5 V when it is used in a circuit.