A bulldozer drags a log weighing 500. N along a rough surface. The cable attached to the log makes an angle of 30.° with the ground. The coefficient of static friction between the log and the ground is 0.50
What minimum tension is required in the cable in order for the log to begin to move?
2.9 × 102 N
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What causes the outward gas pressure that balances the inward pull of gravity in a main-sequence star?
a. the rapid outward flow of gas
b. the rapid inward flow of the gas
c. the high temperature of the gas
d. the high density of the gas
e. the high temperature and the high density of the gas
The density of lead is greater than that of iron, and both are denser than water. Compared to a solid iron object of the same dimensions, the buoyant force acting on a solid lead object is be
1.greater. 2.equal. 3.less.
The Cassini mission to Saturn consists of ________
A) an orbiter that orbits Saturn and a probe that descended to the surface of Titan B) a spacecraft that orbits Saturn and a sample return mission that landed on Titan, scooped up a surface sample, and will return it to Earth C) a large spacecraft that flew by Saturn on its way to other planets D) an orbiter that orbits Saturn and a probe that descended into Saturn's atmosphere
A triangle has sides of length 7 cm and 11 cm. If the triangle is a right triangle, which of the following could be the length of the third side, to the nearest centimeter?
a. 11 cm b. 8 cm c. 16 cm d. 17 cm e. 7 cm