In the terminology "a 500-N block", the "500-N" refers to the block's:
a. mass.
c. weight.
b. force.
d. None of the above.
C
You might also like to view...
A 1200 kg car travels at 25.0 m/s and collides head-on in a perfectly inelastic collision with a stationary 2400 kg truck. The kinetic energy lost in the collision is
A. 330,000 J. B. 250,000 J. C. 125,000 J. D. 95,000 J. E. 75,000 J.
Why are Uranus and Neptune so blue?
A. The planets are very hot, so their blackbody spectra peak at blue wavelengths. B. Hydrogen appears blue when it reflects sunlight. C. Methane in their atmospheres absorb red light and reflect blue light. D. They reflect blue light from their moons.
What observational evidence supports the conclusion that most of the mass of the Milky Way is in the form of dark matter?
A) There is no observational evidence; it is only a theoretical idea based on computer models indicating that the Milky Way could not have formed unless it had much more mass than it contains in stars and gas. B) Although dark matter emits no visible light, we have detected it with radio telescopes. C) We can see the dark matter as dark blotches in the sky, such as the dark lanes that are visible within the Milky Way in the night sky. D) The orbital speeds of stars and gas clouds far from the galactic center are surprisingly high, suggesting that these stars and gas clouds are feeling gravitational effects from unseen matter.
What is the main factor that drives Darwinian evolution?
A) the competition for finite resources B) the need to have sex C) the ability of an organism to harness the energy of the Sun D) the size of an organism