If it takes 8.0 N to stretch a spring 6.0 cm, and if the spring is then cut in half, what force does it take to stretch one of the halves 3.0 cm?
a. 2.0 N
c. 8.0 N
b. 4.0 N
d. 16 N
C
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Equilibrium: A 10-m uniform beam weighing 100 N is supported horizontally by two vertical ropes at its ends. If a 400-N person sits at a point 2.0 m from the left end of the beam, what is the tension in each rope?
What will be an ideal response?
Distinguish between a metal and a metal-containing compound
A) There is no distinction between the two. B) Only one of these contains ionic bonds. C) Only one of these contains covalent bonds. D) Only one of these occurs naturally.
Eddy current in conductors
A. step up voltages. B. dissipate energy. C. increase currents in circuits. D. decrease net charges. E. increase net charges.
If the sum of the external torques exerted on an object is zero, then the sum of the external forces exerted on it must also be zero
A) True B) False