It the mass of a body were doubled, its gravity would become 4 times stronger
Indicate whether the statement is true or false
FALSE
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The small piston of a hydraulic lift has a diameter of 8.0 cm, and its large piston has a diameter of 40 cm. The lift raises a load of 15,000 N
(a) Determine the force that must be applied to the small piston. (b) Determine the pressure applied to the fluid in the lift. What will be an ideal response?
A certain fuse "blows" if the current in it exceeds 1.0 A, at which instant the fuse melts with a current density of 620 A/cm2. What is the diameter of the wire in the fuse?
A) 0.45 mm B) 0.63 mm C) 0.68 mm D) 0.91 mm
Capacitors in Combination: Three capacitors are connected as shown in the figure. What is the equivalent capacitance between points A and B?
A. 12 ?F B. 4.0 ?C C. 7.1 ?F D. 1.7 ?F E. 8.0 ?F
Which of the following best explains why sweating is important to humans in maintaining suitable body temperature?
A) Functioning of the sweat gland absorbs energy that otherwise would go into heating the body. B) The high specific heat of water on the skin absorbs heat from the body. C) Evaporation of moisture from the skin extracts heat from the body. D) Moisture on the skin increases thermal conductivity, thereby allowing heat to flow out of the body more effectively.