Describe an order-of-magnitude estimate
What will be an ideal response?
A rough estimate made by rounding off all numbers to one significant figure and its power of ten, and after the calculation is made, again only one significant figure is kept.
You might also like to view...
How many constellations are on a celestial sphere? How many boundaries are on a celestial sphere? Are boundaries unique to a constellation or shared?
What will be an ideal response?
Energy Conservation With Nonconservative Forces: An object with a mass of 10 kg is initially at rest at the top of a frictionless inclined plane that rises at 30° above the horizontal. At the top, the object is initially 8.0 m from the bottom of the incline, as shown in the figure. When the object is released from this position, it eventually stops at a distance d from the bottom of the inclined plane along a horizontal surface, as shown. The coefficient of kinetic friction between the horizontal surface and the object is 0.20, and air resistance is negligible. Find the distance d.
A. 5.0 m B. 10 m C. 15 m D. 20 m E. 25 m
Galaxy A receding from Galaxy B at a velocity of 7500 km/s, from the perspective of Galaxy B. Hubble's Law says that V=H0 x D. About how far is Galaxy A from Galaxy B? Use a value of 75 km/s/Mpc for Hubble's constant.
A) 5000 Mpc B) 500,000 Mpc C) 50000 Mpc D) 100 Mpc E) 1000 Mpc
Liquid Crystal Displays (LCDs) depend upon which of the following for their operation?
A) coherence B) polarization C) diffraction D) dichroism E) thin film interference