An ideal spring with a force constant (spring constant) of 15 N/m is initially compressed by 3.0 cm from its uncompressed position. How much work is required to compress the spring an additional 4.0 cm?

A) 0.024 J B) 0.030 J C) 0.012 J D) 0.0068 J


B

Physics & Space Science

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For an oxide to be protective, the ratio of the volume of the oxide formed to the volume of the metal atoms that formed the oxide should be approximately _________.

Fill in the blank(s) with the appropriate word(s).

Physics & Space Science

What is the origin of the lobes often observed on opposite sides of radio galaxies?

A. black holes orbiting the center B. high-speed electrons spiraling around magnetic field lines C. supernovae from massive stars D. gas ejected from the core of the galaxy E. hot planetary nebulas surrounding the galaxy

Physics & Space Science

The rate of a chemical reaction would be increased by

a. increasing the surface area of the reactants. b. increasing the concentration of the reactants. c. adding a catalyst to the reactants. d. heating the reactants. e. all of the above.

Physics & Space Science

The figure shows a cross section of three parallel wires each carrying a current of 5.0 A out of the paper. If the distance R = 6.0 mm, what is the magnitude of the magnetic force on a 2.0-m length of any one of the wires?



a.
2.5 mN

b.
3.3 mN

c.
2.2 mN

d.
2.9 mN

e.
1.7 mN

Physics & Space Science