A hollow steel ball of diameter 3.0 m just barely floats in water. What is the wall thickness of the ball? (?Fe = 7.87 g/cm3, ?water = 1.00 g/cm3)
A) 6.6 cm
B) 37 cm
C) 131 cm
D) 79 cm
A
You might also like to view...
A square and a circular loop with the same area lie in the xy-plane, where there is a uniform magnetic field pointing at some angle q with respect to the positive z-direction. Each loop carries the same current, in the same direction. Which magnetic torque is larger?
1.the torque on the square loop 2.the torque on the circular loop 3.the torques are the same 4.more information is needed
A body is oscillating up and down at the end of a spring. Let's consider when the body is at the top of its up and down motion. The velocity
a. is zero c. points up b. has its largest magnitude d. points down
Life forms in the Precambrian include
A) trilobites, brachiopods and stromatolites. B) cyanobacteria and trilobites. C) the agnatha and the coelacanths. D) stromatolites and certain primitive blue-green algae.
Terminal Voltage and Internal Resistance: A 7.0-? resistor is connected across the terminals of a battery having an internal emf of 10 V. If 0.50-A current flows, what is the internal resistance of the battery?
A. 13 ? B. 20 ? C. 10.8 ? D. 27.0 ?